January 29, 2025

Thursday's Snowfall in Alberta Just a Precursor to a Larger Storm That Will Close Out January and Start February

January 29, 2025/ Alannah Campbell

***NOTE: YOU CAN CLICK ON THE MAP TO OPEN A ZOOMABLE IMAGE***

Enjoy the mild temperatures will they last, with the return of more winter-like conditions in Central and Southern Alberta expected to finish the month of January. Things will kick off with a band of snow crossing parts of Northern and Central Alberta on Thursday, followed by a much larger system that will impact a greater portion of Alberta and moving through the Prairies beginning Friday morning.

Light, patchy snow will begin later Wednedsay evening in the Grande Cache area and will slowly spread eastward towards Edmonton overnight and through Thursday morning and early afternoon. The snow will start to dissipate in the late afternoon from east to west, and likely spread a bit southward closer to the Rockies, before completely tapering off around midnight. This pattern will result in widespread 5-10cm, but greater snowfall accumulations, above 10cm, are expected in areas like Edson and Whitecourt and less than 5cm towards the Saskatchewan border.

To the north, in the Peace River region, an additional area of snow will develop in the pre-dawn hours Thursday and settle over the area until the mid-afternoon, leading to up to 10cm of accumulation before tapering off as well.

This brief snowfall event can be considered an appetizer to the main event that is set to begin early Friday morning and continue in Alberta until late Sunday or early Monday. A detailed forecast will be issued Thursday afternoon.

January 28, 2025

Up to 20cm of Fresh Snow On Its Way For the Maritimes Wednesday and Thursday

January 28, 2025/ Alannah Campbell

On the heels of some strong winds and a bit of snow Monday night and throughout the day Tuesday, it appears that snow and colder temperatures will close off the month of January for the Maritimes.

An incoming system will push into the region Wednesday morning, bringing snow to Western Nova Scotia and Southern New Brunswick shortly after sunrise. The snow will spread eastward through the morning and afternoon, reaching Cape Breton and PEI by the late afternoon.

This initial band of snow will be light to moderate, resulting in widespread amounts of roughly 5cm of snow across Nova Scotia and PEI as well as into Southern New Brunswick. Meanwhile, some scattered light snow is expected throughout the day across Central and Northern New Brunswick, which will also lead to up to 5cm of accumulation.

A second round of slightly heavier snowfall will move into Western Nova Scotia and Southern New Brunswick in the evening and make the commute home tricky, especially in the western half of the province. This snow will spread eastward through the remainder of the evening and overnight, leading to an additional 5-10cm of accumulation and up to 20cm overall.

The snow will taper off in the early morning hours, but there could be some flurries lingering throughout Thursday morning, especially in Eastern Nova Scotia and PEI. While not as windy as Monday night and Tuesday, wind gusts up to 50km/h are expected on Thursday which along with the cold air settling in, could drive windchill values closer to -25°C.

January 28, 2025

Another Dumping of Snow as an Alberta Clipper Targets Southern Ontario With Up to 20cm of Snow by Wednesday

January 28, 2025/ Brennen Perry

As January 2025 draws to a close, Southern Ontario’s weather has varied greatly depending on the region.

Snowbelt areas near Lake Huron and Georgian Bay have been bombarded by persistent lake-effect snow over the past couple of weeks. Meanwhile, Eastern and Deep Southwestern Ontario have seen little snow this month, as no significant systems have impacted those areas.

That pattern is about to shift, with an Alberta Clipper poised to bring a widespread snowfall event across Southern Ontario. This system is expected to deliver 10 to 20 cm of snow to Eastern, Central, and Southwestern Ontario over the next 24 hours, including the snowbelt regions.

In addition to the clipper, snow squalls are forecast to develop Wednesday afternoon and continue into the evening. Combined system snow and lake effect snow could bring an additional 20 to 30 cm to areas east of Lake Huron between Tuesday and Wednesday.

**PRECIPITATION TYPE** - MAP FROM WEATHERBELL

Snowfall from the clipper has already begun moving into Southwestern Ontario near Lake Huron as of late Tuesday afternoon.

Moderate to heavy snow will spread eastward through the evening, with the heaviest snow expected in the Greater Toronto Area (GTA) and Central Ontario during the late afternoon and early evening.

Localized heavier snow is likely along the Lake Huron and Georgian Bay shorelines, particularly over the Bruce Peninsula, where lake enhancement will add extra moisture to the system.

For Southwestern Ontario, snowfall will begin to taper off by the evening and should exit areas southwest of Lake Simcoe by midnight.

Central and Eastern Ontario will continue to see snow through the early overnight hours, with the Ottawa Valley potentially experiencing snowfall until Wednesday morning, tapering off around sunrise.

**HOURLY SNOWFALL RATE/intensity** - MAP FROM WEATHERBELL

Following the system’s departure, lake effect snow is expected to ramp up over Lake Huron and Georgian Bay.

Models indicate disorganized snow bands developing off Lake Huron on Wednesday afternoon, impacting areas like Grey, Bruce, Huron, and Perth counties. These bands may occasionally extend as far as Kitchener and Hamilton.

Additionally, a snow squall may form southeast of Georgian Bay, bringing heavy snow to the Barrie and Innisfil areas Wednesday afternoon. The intensity and duration of this squall remain uncertain.

By Wednesday evening, activity over Lake Huron may consolidate into a stronger squall targeting the corridor between Southampton and Kincardine, potentially extending to the Hanover area. This squall could lead to rapid snowfall accumulation before gradually weakening after midnight.

The highest snowfall totals over the next 24 hours are expected in the Grey-Bruce region.

Communities such as Port Elgin, Kincardine, Owen Sound, Chatsworth, Mildmay, and Hanover are forecast to receive 10 to 15 cm of snow from the clipper and an additional 10 to 20 cm from lake effect snow on Wednesday.

This could bring total accumulations to 20 to 30 cm, with isolated pockets potentially exceeding 30 cm.

Across Central and Eastern Ontario, Alberta Clipper snowfall is generally expected to range from 10 to 15 cm. Areas southeast of Georgian Bay, including Barrie, may see near 20 cm due to the added snow from Wednesday afternoon’s localized squalls.

Lower totals are expected in the GTA and Niagara regions, as the system’s moisture will primarily focus further north, and lake enhancement will not play a role.

Snowfall amounts in the GTA are expected to range from 4 to 8 cm, with Hamilton and the Niagara corridor seeing even less at 2 to 4 cm.

Deep Southwestern Ontario, including Windsor, Chatham, Sarnia, and London, will see little to no snow from this system. London could receive a few centimetres, while Windsor may only see a trace.

Looking ahead, we are monitoring a potential system moving in on Friday, which could bring snow and freezing rain to parts of Southern Ontario. Stay tuned for updates.

January 27, 2025

Blowing Snow Could Be a Concern Overnight and Into Tuesday Morning as Strong Winds Move Through the Maritimes

January 27, 2025/ Alannah Campbell

***Model Image showing the location of snow at 3AM Tuesday, January 28th, 2025***

We are continuing to track the intense squall line that is making its way across parts of Ontario and Quebec. Luckily, the strongest winds and blasts of heavy snow will pass through New England, but the Maritimes won’t be completely spared.

We’re already beginning to see the winds ramp up in New Brunswick and PEI, ahead of the squall line. Wind gusts are expected in the 60-80km/h range across the two provinces for the remainder of the evening and into the early morning. The strong winds will make their way into the Western half of Nova Scotia at around 9pm and will spread across the province overnight and continue through the morning.

These strong winds are expected to whip up the snow that is already on the ground, leading to localized white-out conditions and drifting snow. This will make travel in some areas difficult so make sure to take extra caution out on the roads during these conditions.

The snow associated with the squall line will follow the strong winds, moving into Northern New Brunswick after midnight. It will spread southeastward across the region throughout the morning, reaching Prince County, PEI just after sunrise and the Annapolis Valley and Cumberland County, Nova Scotia shortly after. This snowfall will be moderate and only last for a couple of hours, leading to isolated pockets of 5-10cm across the region, but it won’t be too impactful.

January 26, 2025

Damaging Wind Storm Sweeps Into Ontario With Gusts Over 90 km/h and Blizzard Conditions on Monday

January 26, 2025/ Brennen Perry

The final week of January is shaping up to start with turbulent weather across Southern Ontario, as a damaging windstorm is set to impact the region on Monday.

Wind gusts are forecasted to reach 80 to 90 km/h across much of Southern Ontario during the day on Monday, with some localized pockets potentially seeing gusts exceeding 100 km/h.

Power outages are a significant concern for the hardest-hit regions, along with other types of wind-related damage, such as fallen tree branches and unsecured objects being blown around. In addition, the strong winds may create another hazard along the Great Lakes shoreline, where ice could be pushed ashore, causing damage to property along the lakes.

Adding to the danger, a sharp cold front is expected to sweep through Ontario over the next 24 hours, bringing a blast of wintry weather, including an intense frontal snow squall. Combined with the strong winds, some areas could experience blizzard-like conditions starting late Monday afternoon and lasting into the evening.

While this event isn’t expected to bring significant snowfall totals to Southern Ontario, accumulations could range from 5 to 15 cm, depending on the location.

However, areas east of Lake Superior in Northern Ontario may see higher amounts, with localized totals reaching 20 to 30 cm, while a broader area of Northeastern Ontario is expected to receive 10 to 20 cm.

The windstorm is expected to begin early Monday morning across Southern Ontario, with wind speeds gradually increasing through mid-morning.

Southwestern Ontario, particularly areas along the Lake Huron shoreline, will experience the strongest winds first, around sunrise. These conditions will then spread east and north by early afternoon.

The strongest winds are anticipated during the early to mid-afternoon hours, with widespread gusts ranging from 70 to 90 km/h across the region.

Areas such as the Dundalk Highlands, Niagara region, Northern Lake Erie shoreline, and Prince Edward County could see slightly higher wind gusts due to their exposure to the lakes and elevated terrain. Gusts in these areas may exceed 100 km/h, possibly reaching 105 to 110 km/h near Collingwood along the Georgian Bay shoreline.

Other locations, including Goderich, Kincardine, Owen Sound, Wiarton, Tobermory, Guelph, Kitchener, Hamilton, Brantford, Britt, Parry Sound, Belleville, Kingston, and Brockville, could experience wind gusts between 90 and 100 km/h. This range represents the greatest potential for wind damage, including localized power outages.

The remainder of Southern Ontario—excluding Deep Southwestern Ontario and the Ottawa Valley—can expect gusts between 80 and 90 km/h, with occasional stronger gusts. Deep Southwestern Ontario and the Ottawa Valley are likely to see slightly weaker winds, with maximum gusts of 70 to 80 km/h.

For those with properties along the Great Lakes, particularly Lake Erie, the risk of ‘ice shoves’—where winds push broken ice onto shore—is a concern. This phenomenon can cause significant damage and flooding along the shoreline. Residents in affected areas should prepare for this potential over the next 24 hours.

Wind speeds are expected to diminish somewhat later in the afternoon and into Monday evening, though they will remain strong, ranging from 60 to 90 km/h. This coincides with the arrival of a pocket of moderate to heavy snow in Central Ontario during the late afternoon.

The snowfall is expected to begin affecting the Parry Sound and Muskoka regions between 2:00 and 4:00 PM, leading to blowing snow and possible blizzard conditions lasting several hours into the evening.

Travel during this time will likely be hazardous, with significantly reduced visibility and potentially closed roads. While snowfall rates won’t be overwhelming, at a few centimetres per hour, the strong winds will make conditions dangerous.

Travel should be avoided unless absolutely necessary. Fortunately, conditions are expected to improve within a few hours.

By dinnertime, widespread snowfall is likely across most of Central Ontario, portions of Eastern Ontario, and areas east of the Lake Huron shoreline.

The worst conditions are expected early in the event, as the snow begins and winds are strongest, with gradual improvement into the later evening hours.

The greatest risk of blizzard conditions will be across Grey-Bruce, the Georgian Bay shoreline, Muskoka, and Parry Sound, where the heaviest snow and strongest winds are forecasted to overlap.

An intense, narrow band of snow is also expected to develop along the cold front as it moves through Southern Ontario in the evening.

This frontal snow squall could bring a sudden burst of heavy snow almost everywhere in Southern Ontario, lasting less than an hour.

The squall is expected to reach Central and Eastern Ontario by mid to late evening, while the Greater Toronto Area and Niagara region may not experience it until closer to midnight.

This squall is not expected to produce significant snowfall totals, as it will pass through quickly. However, it could bring 2 to 5 cm of snow within 15 to 30 minutes, along with brief but intense blowing snow.

Although conditions may feel like a blizzard during this time, they likely won’t meet the official criteria, which require blizzard conditions to last at least four hours. That criteria is more likely to be met around the Lake Huron and Georgian Bay shoreline as the snow starts earlier in the day.

By the end of Monday, the highest snowfall totals are expected in the higher elevations of Central Ontario, including Huntsville, Sundridge, Algonquin Park, and North Bay, where accumulations of 10 to 20 cm are likely, though closer to the lower end of that range.

For the rest of Central Ontario and areas east of Lake Huron, including Hanover, Orangeville, and Collingwood, this event is expected to bring 5 to 10 cm of fresh snowfall.

Eastern Ontario and the Lake Huron shoreline should see 2 to 5 cm, primarily from the passing snow squall.

The Golden Horseshoe and Deep Southwestern Ontario are likely to receive less than 2 cm of snow.

In Northern Ontario, snow will begin late Sunday night and continue through much of Monday.

The heaviest accumulations will occur east of Lake Superior, where lake enhancement and embedded snow squalls could push totals to 20 to 30 cm in areas like Wawa and Sault Ste. Marie.

Blizzard conditions are possible during the morning and afternoon in these regions, with wind gusts reaching 70 to 90 km/h near the shoreline.

The rest of Northeastern Ontario, stretching from North Bay to Cochrane along the Quebec border, is expected to receive 10 to 20 cm of snow by the end of Monday.

Sudbury, which may find itself in a dry pocket, is forecasted to see 5 to 10 cm, closer to the lower end of that range, while Elliot Lake should receive less than 5 cm.

January 25, 2025

Snow Squalls Return to Southern Ontario This Weekend With Up to 20cm of Snow; Potential Wind Storm on Monday

January 25, 2025/ Brennen Perry

Southern Ontario has been gradually climbing out of the deep freeze earlier this week, which brought wind chills plunging into the -30s. This temporary reprieve has also slowed down the lake-effect snow machine.

However, a fresh surge of cold air over the next 24 hours will reignite the potential for snow squalls, particularly around Georgian Bay.

The good news is that this round of snow squall activity should be relatively short-lived. The squalls are expected to drift rather than anchor in one spot, which will help limit overall snowfall accumulation.

By the end of Sunday, areas along the eastern Georgian Bay shoreline and the Bruce Peninsula are forecast to receive between 10 and 20 cm of snow.

Despite the shorter duration, these squalls could still create hazardous conditions. Wind gusts will likely lead to blowing snow, further reducing visibility on roads and making travel potentially dangerous.

Looking ahead, once the snow squalls subside late Sunday, attention shifts to a potentially significant windstorm developing across Southern Ontario starting Monday morning and lasting through the day.

Based on the latest data, wind gusts could approach or even exceed 100 km/h in some regions.

This powerful wind event will coincide with the arrival of a weather system bringing widespread snowfall to Southern Ontario beginning Monday afternoon.

While snowfall totals from the system are expected to range between 5 and 15 cm, the combination of strong wind gusts and falling snow could lead to blowing snow and, in some areas, blizzard conditions.

Driving conditions during Monday’s evening commute are expected to be very poor, with a high risk of power outages in areas that experience the strongest wind gusts.

Be prepared for possible heating disruptions if outages occur, as temperatures are forecast to drop sharply Monday night.

The cold front responsible for these changing conditions will sweep through Southern Ontario on Saturday evening. While surface temperatures will remain relatively stable, colder air aloft will fuel the lake-effect snow machine.

As a result, heavier snow pockets may develop east of Georgian Bay, particularly in the Parry Sound and northern Muskoka regions, aided by lake enhancement.

Snow squalls could also form within this setup, bringing locally higher snowfall amounts. Current projections suggest 5 to 15 cm of accumulation by Wednesday morning, but totals could reach up to 20 or even 25 cm if conditions align perfectly.

High-resolution models show a significant snow squall developing over the southern Bruce Peninsula on Sunday morning.

This squall may extend across Georgian Bay, reaching Simcoe County and parts of Kawartha Lakes. It appears likely to linger for several hours between Orillia and Barrie, producing intense snowfall with rates approaching 5 cm per hour.

As the squall moves into Simcoe County during the afternoon, it is expected to weaken, leading to reduced snowfall rates. Additionally, weaker bands of lake-effect snow could develop off Lake Huron, potentially affecting areas like Kincardine, Hanover, and even parts of the Greater Toronto Area.

However, these bands are less certain and may only persist for a few hours on Sunday morning.

By Sunday evening, snow squall activity will likely shift northward into Muskoka and Parry Sound, intensifying briefly and delivering heavy snow to areas like Port Carling and Bracebridge.

Organized lake-effect snow activity should taper off by midnight, although minor flurries may linger into early Monday morning.

Because the squalls are expected to move frequently, snowfall will be spread across a wider area rather than concentrating in one location.

Most regions along the eastern Georgian Bay shoreline, including Barrie, Muskoka, and Parry Sound, are forecast to receive between 10 and 20 cm of snow by Sunday evening. This also applies to the Bruce Peninsula and areas like Owen Sound and Meaford.

Localized amounts exceeding 20 cm are possible, particularly in the corridor between Orillia and Barrie, where intense snow squalls are expected on Sunday morning. However, the current data does not support widespread totals in the 20-30 cm range.

Outside the primary snowbelt areas, regions such as Haliburton, Lindsay, Keswick, and Flesherton are likely to see 5 to 10 cm of snow, depending on the placement of snow squalls and how far inland they extend.

For the rest of Southern Ontario, snowfall amounts will generally be less than 5 cm, with most of the snow falling on Saturday evening and overnight.

The windstorm on Monday is expected to bring the strongest gusts to higher elevations, including the Dundalk Highlands, Collingwood, and Orangeville.

Wind gusts in these areas could reach 100 to 110 km/h, with similar strength expected along the escarpment, down into Hamilton, and across the Niagara region along the Lake Erie shoreline.

In Southwestern Ontario, gusts could exceed 90 km/h in areas east of Lake Huron, extending into Kitchener and the western Greater Toronto Area.

Elsewhere across Southern Ontario, gusts will likely range from 80 to 90 km/h, while Central and Eastern Ontario could see slightly weaker gusts of 70 to 80 km/h.

The addition of widespread snowfall on Monday afternoon and evening will exacerbate the impact of the wind. Blowing snow could create whiteout conditions, and some areas may experience blizzard-like conditions, especially in Southwestern Ontario.

While snowfall totals from this system aren’t expected to be excessive, with 5 to 15 cm possible across Southwestern and Central Ontario, the combination of snow and strong winds will make travel extremely challenging.

Further details on timing and accumulation specifics will be shared in a forecast update on Sunday. Stay tuned!

January 19, 2025

High-Impact Snow Squall Event Could Bring Up to 100 cm and Blizzard Conditions to Southern Ontario’s Snowbelt Starting Monday

January 19, 2025/ Brennen Perry

*MAP UPDATED @ 3:30 PM - JANUARY 20, 2025 -* ***NOTE: YOU CAN CLICK ON THE MAP TO OPEN A ZOOMABLE IMAGE***

Chilly Arctic air has begun sweeping into Southern Ontario this weekend, marking the return of lake-effect snow activity off the Great Lakes. While snow squalls on Sunday have been relatively limited, they are expected to organize and intensify as the evening progresses.

Intense snow squalls are set to impact areas around Lake Huron and Georgian Bay from Monday through Tuesday. Portions of the Niagara region and Prince Edward County may also experience squalls driven by activity off Lake Ontario and Lake Erie.

Moderate wind gusts of 50-60 km/h are likely to develop on Monday morning. When combined with heavy snow, these winds could cause blowing snow and localized blizzard-like conditions in some areas. Poor travel conditions are anticipated, with road closures possible throughout Monday and into Tuesday.

The Bruce Peninsula is expected to bear the brunt of these squalls. A prolonged and intense squall is likely to lock in over the region from Monday afternoon through Tuesday, with snowfall totals potentially approaching 100 cm.

Other areas along the Lake Huron shoreline, as well as parts of Simcoe County and Muskoka, could see snowfall accumulations of 25-50 cm by the end of Tuesday.

This forecast also extends to the southern tip of Prince Edward County, south of Picton, where a Lake Ontario squall could drift across the county before moving into New York State.

As of Sunday evening, a pocket of heavy snow over Lake Ontario is affecting northern Niagara. Meanwhile, a squall over Lake Huron has diminished but is expected to reorganize by midnight.

According to the latest model data, a very narrow yet intense squall is likely to develop over the Goderich area overnight. Snowfall rates could reach 10-15 cm per hour, with higher ratios due to colder temperatures.

This could result in rapid snow accumulation across Huron County, particularly in the Goderich region, through Monday morning.

There is some uncertainty regarding how far inland this squall will extend. However, it could potentially stretch into the Kitchener area, through Burlington and Hamilton, and become further enhanced as it moves back onshore over the Niagara region via Lake Ontario.

By Monday afternoon, a shift to more westerly winds is expected, pushing the Lake Huron squall towards the Bruce Peninsula. The squall is predicted to stall over the northern and central parts of the peninsula by Monday evening.

Wind gusts will strengthen throughout Monday afternoon and evening, reaching 50-60 km/h in some areas. These winds are likely to create blowing snow and near-zero visibility, making travel nearly impossible east of Lake Huron. While conditions may not officially meet blizzard criteria, they will be very close.

Model projections diverge on the squall's movement after it crosses Georgian Bay. Canadian models suggest a variable wind direction could cause the squall to curve northward into Muskoka and Parry Sound instead of continuing east.

Meanwhile, the American model indicates a more southerly trajectory, targeting Midland, Honey Harbour, and Washago. This model also suggests secondary squall activity could impact southern Bruce-Grey areas, including Port Elgin and Owen Sound.

Both models agree that upper-level winds will likely keep the squall close to the Georgian Bay shoreline. This may spare inland areas like Bracebridge, Gravenhurst, and Orillia from the heaviest snowfall, though the squall's reach could still surprise some locations.

There is also uncertainty regarding squalls over Lake Ontario and Lake Erie. While these squalls may drift northward into Fort Erie and southern Prince Edward County, they could remain concentrated south of the border.

Snow squall activity is expected to remain stationary through Monday night into Tuesday morning, with snowfall rates of 5-10 cm per hour possible.

The Bruce Peninsula squall may gradually drift southward on Tuesday afternoon, although it is expected to weaken slightly as wind directions shift. Despite this, squalls will likely persist over the Grey-Bruce region throughout Tuesday.

Snow squalls are anticipated to continue into Wednesday, although their intensity and direction remain uncertain. Southwesterly winds may develop, which could direct squalls over the Bruce Peninsula and extend into the Parry Sound region.

UPDATED FORECAST (3:30 PM - JAN 20, 2025)

Muskoka, before you grab a pitchfork to take out your snow frustrations, you might want to trade it in for a snow shovel—you’re going to need it. 😉

The latest model data this morning doesn’t bring good news for those in Muskoka hoping for a break from the snow. How does another 50-100 cm sound?

In our initial forecast, we mentioned that model data suggested snow squall activity would stay primarily along the Georgian Bay shoreline. This meant that areas further inland, such as Bracebridge, Port Carling, and Gravenhurst, could avoid the brunt of the snow.

Unfortunately, the newest data paints a different picture. This morning’s updates indicate that snow squalls will push much further inland than originally expected. The models also show an increase in the intensity of these squalls, starting late this afternoon and continuing all day through Tuesday.

As a result, we’ve made adjustments to our forecast, extending the zone of heavy snow further inland east of Georgian Bay. Additionally, we’re now introducing a 50-100 cm snowfall zone for Muskoka, similar to what was previously focused over the Bruce Peninsula.

Locations such as Port Carling, Rosseau, Port Sydney, and Bracebridge are now directly in the crosshairs, with the potential for up to 100 cm of snow by the end of Tuesday. Meanwhile, the forecast for the Bruce Peninsula—covering Tobermory, Lion’s Head, and Wiarton—remains unchanged, with totals still expected to reach 50-100 cm.

For the rest of Muskoka, including Huntsville and Gravenhurst, as well as Parry Sound and Midland, snowfall accumulations of 25-50 cm are likely. This range also applies to the Owen Sound, Meaford, and Port Elgin areas.

You might notice a slight reduction in the forecast east of Lake Huron. This adjustment reflects snowfall that already occurred last night and early this morning, especially in areas like Goderich. These regions are expected to see an additional 15-25 cm of snow by the end of Tuesday.

Our forecast for Fort Erie and Prince Edward County remains unchanged. Squall activity off Lake Erie and Lake Ontario could bring 15-25 cm of snow to the southern Niagara region, including Fort Erie. Meanwhile, southern Prince Edward County, particularly south of Picton, could see totals ranging from 25-50 cm.

See below for our Lake Ontario and Lake Erie forecast.

PREVIOUS FORECAST:

Given the frequent mention of the Bruce Peninsula in this forecast, it’s no surprise that this region is expected to receive the most snowfall from this event.

Accumulations of 50-100 cm are projected for areas including Tobermory, Lion’s Head, and Wiarton. Some locations may even exceed 100 cm if the squall remains stationary for an extended period.

Along the Lake Huron shoreline, areas such as Goderich, Point Clark, Kincardine, Port Elgin, Chatsworth, Owen Sound, and Meaford are likely to see 25-50 cm of snowfall by Tuesday’s end. As with most snow squalls, localized variations in totals are expected based on the squall's exact path.

Similar snowfall amounts of 25-50 cm are possible along the eastern Georgian Bay shoreline, including Midland and MacTier. However, these totals will be highly localized, as the squall’s path is still uncertain.

Further inland, areas east of Lake Huron, such as Listowel, Hanover, and Flesherton, are forecasted to receive 15-25 cm of snow. Western Muskoka and Simcoe County, including Port Carling, Bala, Washago, and Gravenhurst, could also see 15-25 cm.

Brief periods of heavy snow are possible in the western GTA, Kitchener, Barrie, and parts of Muskoka, leading to localized accumulations of 5-15 cm. Most areas will likely remain on the lower end of this range, but isolated pockets could approach 15 cm.

The St. Catharines and Niagara-on-the-Lake regions are currently experiencing locally heavy snow, which is expected to continue overnight. By Monday morning, total snowfall, including amounts already fallen, could range from 15-25 cm.

Fort Erie may also see 15-25 cm of snow if the Lake Erie squall edges far enough north. However, there is a possibility that the squall will remain south of the border, resulting in minimal accumulation on the Canadian side.

In Prince Edward County, the southernmost tip exposed to Lake Ontario could see 25-50 cm of snow. Slight shifts in the squall’s position could significantly impact snowfall totals, with Picton potentially receiving 15-25 cm under favourable conditions.

The rest of Southern Ontario is expected to see less than 5 cm of snow from this event. The Ottawa Valley and areas in deep southwestern Ontario will likely experience the least snowfall, with accumulations of less than 2 cm by Tuesday.

January 18, 2025

Frosty Start Early This Week as Extreme Cold Brings Intense Snow Squalls in Parts of Southern Ontario

January 18, 2025/ Brennen Perry

Get ready for a blast of Arctic air across Southern Ontario this week! A surge of polar air will cause temperatures to plummet over the weekend and into early this week.

This extreme cold is also expected to trigger a multi-day snow squall event, which could result in significant snowfall for the usual snowbelt regions.

Dangerous wind chills approaching -30°C by Monday night, combined with intense snowfall rates, will create hazardous travel conditions. The hardest-hit areas are likely to be along the Lake Huron shoreline, including Grey, Bruce, and Huron counties.

Moderate wind gusts of 40-60 km/h could lead to blowing snow, with localized blizzard-like conditions possible. Non-essential travel in these regions should be avoided, as the extreme cold could quickly turn life-threatening if you become stranded.

While exact snowfall totals remain uncertain, the cold temperatures will enhance snowfall ratios, resulting in higher-than-usual snowfall rates for the same amount of moisture. Portions of Grey and Bruce counties along the shoreline could see snowfall accumulations exceeding 50 cm.

Lake Ontario and Lake Erie may also see localized lake-effect snow starting Sunday night and continuing through Tuesday. The Niagara region and Prince Edward County could receive 25-50 cm of snow in some areas, though accumulations will be highly localized.

TIMING

The event will begin with light snow across Southwestern Ontario and the Golden Horseshoe on Monday evening. Lake enhancement along the Lake Huron shoreline and parts of the Western GTA and Northern Niagara region is expected.

However, it’s unclear how far these snow bands will extend inland, with some models suggesting they’ll remain close to the shoreline.

For example, high-resolution Canadian models show an intense but narrow squall near the Goderich region that doesn’t stretch far inland.

Similarly, a Lake Ontario squall may take an unusual path through Grimsby, St. Catharines, and Niagara-on-the-Lake, staying close to the shoreline.

Overnight Sunday into Monday morning, a more stable wind direction could allow a Lake Huron squall to push farther inland, potentially affecting Kitchener, Hamilton, and Burlington.

These areas could see a few hours of heavy snow during the morning commute.

By late Monday morning, the squall may gradually drift northward, reducing snowfall around Goderich as the wind shifts westerly. The Grey-Bruce region is likely to bear the brunt of the snow squalls at this point.

The Toronto area might see the edge of the squall by late morning, but snow intensity there remains uncertain.

On Monday evening, a persistent squall is expected to form across the Bruce Peninsula and extend over Georgian Bay into Muskoka.

However, it may struggle to reach far inland, confining the heaviest snow to shoreline areas like Parry Sound, MacTier, and Bala. Bracebridge and Gravenhurst might avoid the worst of the snow—a welcome break after this winter’s relentless storms.

Lake Erie and Lake Ontario squalls will also intensify Monday night, with the Lake Erie squall drifting north into Port Colborne and Fort Erie.

Meanwhile, the Lake Ontario squall could impact southern Prince Edward County. Unfortunately, these squalls are unlikely to shift much overnight, meaning sustained snowfall and high winds could create treacherous conditions.

As Tuesday morning approaches, the Lake Huron squall may refocus on southern Bruce County, including Owen Sound, Sauble Beach, Kincardine, and Hanover. These areas could face significant snowfall throughout the day.

The Lake Erie squall may drift southward, offering some relief to the Niagara region, though Fort Erie could remain under heavy snow. For Prince Edward County, the Lake Ontario squall may persist through much of Tuesday, delivering relentless snowfall.

A wind shift late Tuesday should end snow squalls off Lakes Erie and Ontario, but activity off Lake Huron may reposition toward the Bruce Peninsula and Muskoka.

Details for snow squall activity beyond Tuesday night will be covered in future updates.

THE BIG CHILL

The big factor fueling these squalls is the frigid air moving over the relatively warm Great Lakes.

Temperatures could drop to -20°C by Monday night, with wind chills in the -30s for many parts of Southern Ontario, including the southwest.

This dangerous combination of extreme cold and heavy snow could lead to life-threatening conditions if you get stranded outdoors.

That’s why it’s critical to avoid travel during this period and stay home whenever possible.

School bus cancellations are likely on Monday and Tuesday due to both extreme cold and snow squalls.

HOW MUCH TO EXPECT

As always with snow squalls, their narrow and shifting nature makes forecasting totals challenging. Some areas may see just 1 cm, while others a short distance away could be buried under 50 cm.

Model data suggests that Bruce County will be hardest hit, particularly along the Bruce Peninsula, Port Elgin, Kincardine, and Point Clark, where over 50 cm of snow is possible.

Huron and Grey counties, including Owen Sound, Chatsworth, Hanover, Wingham, and Goderich, could see up to 50 cm in places.

Inland areas like Kitchener and Orangeville may get up to 25 cm, while the Eastern Georgian Bay shoreline, including Muskoka, could see similar totals.

The Niagara region, especially along its northern and southern edges, may get up to 25 cm of snow between Monday night and Tuesday. In Prince Edward County, localized totals of 50 cm are possible, especially in southern areas.

Kingston could see up to 10 cm, while eastern Ontario and deep southwestern Ontario will likely receive no more than 5 cm.

Stay tuned for updates as high-resolution models refine snowfall predictions.

For now, it’s clear that this storm will bring a mix of extreme cold, heavy snow, and treacherous travel conditions to Southern Ontario. Stay safe and stay prepared!

January 16, 2025

Arctic Blast Across Canada With Potentially Coldest Air in Years; Dangerous Wind Chills Near -40°C Possible Next Week

January 16, 2025/ Brennen Perry

Get ready for a major Arctic chill as some of the coldest air in over a year is set to spread across much of Canada over the next week.

This icy blast will originate in the Arctic and surge into Central and Eastern Canada, causing temperatures to plummet to dangerously low levels. Wind chills could drop to between -30°C and -40°C—or even lower—in several regions by early next week.

This extensive polar plunge will impact much of Canada and even stretch into parts of the United States. Over the next five to seven days, nearly everyone will feel the chill in some capacity.

The Prairies will be the first to experience this frigid air as it arrives late Friday into Saturday. By early next week, the cold will spread eastward into Ontario, Quebec, and Atlantic Canada, blanketing nearly all of the country in sub-zero temperatures. The cold snap is expected to last for a few days, but relief will arrive with more seasonal air by mid to late next week.

SATURDAY

In Alberta, Saskatchewan, and Manitoba, the cold will start to settle in Friday night and intensify into Saturday morning. Temperatures will plunge below -20°C and could approach -30°C in some areas, even before factoring in the wind chill.

The coldest conditions will hit northern areas like Fort McMurray and Thompson, where wind chills could make it feel like -40°C to -45°C.

Most of Saskatchewan and Manitoba, excluding Winnipeg, will see wind chills between -35°C and -40°C. Winnipeg and Edmonton will feel slightly less severe, with wind chills in the low to mid -30s, while Calgary will range from -25°C to -30°C.

Northern Ontario will also begin to feel the chill, with wind chills making it feel close to -30°C in places like Thunder Bay by Saturday morning.

Meanwhile, Southern Ontario will enjoy one last relatively mild day on Saturday, with temperatures near the freezing mark. However, the arrival of the Arctic air could bring a flash freeze late Saturday in Northeastern and Southern Ontario. Rapidly dropping temperatures may lead to icy road conditions, so caution is advised.

SUNDAY

By Sunday morning, the cold air will deepen across the Prairies, bringing wind chills into the -40s for much of Saskatchewan and Manitoba. This includes locations like Edmonton, Fort McMurray, Saskatoon, Regina, and Thompson.

Winnipeg and Calgary will be slightly less frigid, with wind chills closer to -30°C to -35°C, though colder temperatures are expected by Monday morning.

Ontario will also see temperatures drop sharply by Sunday morning. Northern Ontario will experience bitterly cold air, with actual temperatures between -20°C and -30°C and wind chills closer to -40°C in the northernmost areas.

Southern Ontario will see temperatures ranging from -10°C to -20°C, with the coldest air in Central and Eastern Ontario. Wind chills in Northern sections of Southern Ontario could approach -30°C, while Southwestern Ontario and the Golden Horseshoe will feel like -20°C to -25°C.

The arrival of Arctic air could also reignite lake-effect snow squalls early next week. Snowbelt regions around Lake Superior, Lake Huron, and Georgian Bay could see heavy snowfall as a result. More details on this will be provided in a separate forecast.

STAYING SAFE IN THE EXTREME COLD

(Forecast continues below)

Extreme cold can pose significant risks to safety and health, especially when wind chill intensifies the freezing temperatures. Even moderate wind speeds can dramatically lower the "feels like" temperature, increasing the risk of frostbite.

When wind chill drops below -27°C, exposed skin can freeze in 30 minutes or less. At extreme levels, such as -40°C or colder, frostbite can occur in as little as 5-10 minutes.

To protect yourself and your loved ones, limit time spent outdoors during these dangerous conditions. If you must go outside, dress in multiple layers of loose-fitting, insulated clothing.

Make sure to cover all exposed skin with hats, scarves, gloves, and insulated boots. A windproof outer layer is essential to reduce the effects of cold winds.

Pay attention to frostbite warning signs, including numbness, tingling, or a loss of colour in fingers, toes, nose, or ears. If you suspect frostbite, immediately move to a warm location and avoid rubbing the affected area, as this can worsen tissue damage.

Hypothermia is another serious concern; symptoms include shivering, confusion, and slurred speech. Seek medical attention if hypothermia or frostbite is suspected.

For those driving during extreme cold, always keep an emergency kit in your vehicle with essentials such as blankets, extra clothing, food, and water.

Ensure your phone is fully charged, and let someone know your travel plans. Avoid leaving pets outdoors for extended periods, as they are equally susceptible to frostbite and hypothermia.

MONDAY

The worst of the cold will likely occur Monday morning, especially in the west, with Arctic air entrenched across much of Central and Eastern Canada. Temperatures near or below -30°C will stretch from Alberta to Western Quebec.

Wind chills could make it feel like -40°C or colder across Saskatchewan, Manitoba, Northern Ontario, and parts of Eastern Alberta and Western Quebec. Calgary and Edmonton will escape the worst, but wind chills will still hover around -35°C.

In Southern Ontario, most areas will see temperatures near -20°C, with Central and Southwestern Ontario experiencing the coldest air. Wind chills will make it feel like -25°C to -35°C, a pattern also expected in Montreal and Quebec City.

Atlantic Canada will begin to feel the polar plunge by Monday morning. Wind chills will drop to around -25°C in Northern New Brunswick, while Prince Edward Island and Nova Scotia will remain slightly milder, with wind chills ranging from -5°C to -15°C.

TUESDAY

By Tuesday morning, the coldest air will shift further east, bringing some relief to the Prairies. Alberta will see temperatures climb back into the single digits, with wind chills in the teens.

Eastern Saskatchewan will remain colder, with wind chills near -25°C to -30°C, while western regions warm slightly. Manitoba will also improve, though wind chills will still range from -30°C to -35°C, particularly near the Ontario border.

Tuesday is likely to be the coldest day for Ontario, as the Arctic air peaks over the province. Northern Ontario will see temperatures between -30°C and -40°C, with wind chills plunging well into the -40s.

Southern Ontario will experience temperatures from -20°C to -30°C, with wind chills making it feel like -35°C to -40°C in Central Ontario and the Ottawa Valley, and -30°C to -35°C elsewhere.

Montreal and Quebec City will endure similarly bitter conditions, with wind chills of -35°C or lower. Central and Western Quebec will feel even colder, with wind chills dropping below -40°C.

Atlantic Canada will also face its coldest morning on Tuesday. Wind chills will range from -35°C in Northern New Brunswick to the -20s in Nova Scotia and Prince Edward Island.

WEDNESDAY

Wednesday morning will bring one final bitterly cold start for much of Eastern Canada, but signs of improvement will begin to appear.

Southwestern Ontario, including Windsor, Sarnia, and London, could see wind chills near -35°C or even -40°C. Northern Ontario will finally climb above -30°C wind chills for the first time in days, marking the beginning of a warming trend.

Quebec will remain very cold, with wind chills near -40°C in some areas, while Montreal and Quebec City will continue to see wind chills of -35°C.

Atlantic Canada will face another cold morning, with wind chills between -20°C and -35°C.

Most of Eastern Canada will see a reprieve from the extreme cold by Thursday morning. However, this may only be temporary, as long-range models suggest another Arctic surge could arrive late next week into the weekend. Stay tuned for updates.

January 12, 2025

Intense Snow Squalls Return to Parts of Southern Ontario on Monday; Possible Deep Freeze for Late January

January 12, 2025/ Brennen Perry

⬇️ ZOOMED IN MAP CAN BE FOUND FURTHER DOWN ⬇️

The first half of January is almost behind us, and in Southern Ontario, the weather has shifted significantly compared to December. Colder temperatures have dominated, leading to several bouts of snow squall activity off Lake Huron and Georgian Bay. These events have primarily impacted regions southeast of the lakes.

The threat of snow squalls is set to return this week, with the heaviest snow expected east of Lake Huron and Georgian Bay. A predominant westerly flow will target areas such as Parry Sound, Bracebridge, Gravenhurst, and parts of Grey and Bruce counties. This pattern is reminiscent of what we experienced in early December, with heavy snow focused in the snowbelt regions east of Georgian Bay.

Snow squalls are forecasted to develop Monday afternoon and further intensify into the evening and overnight hours. Rapid snowfall accumulation and near-zero visibility are likely, especially late Monday into early Tuesday.

By the time the squall activity tapers off on Tuesday afternoon, some localized areas in the Muskoka and Parry Sound regions could see totals between 25 and 50 cm.

A brief reprieve from lake-effect snow is expected after Tuesday as milder air moves into Southern Ontario. However, another Arctic plunge is anticipated by early next week, potentially bringing some of the coldest air of the season.

Wind chills could make it feel like -30°C or even -40°C, especially in Central and Eastern Ontario!

This upcoming cold snap could also reignite intense lake-effect snow activity, with several rounds of squalls likely to impact the snowbelt regions throughout the rest of January.

BREAKING DOWN THE TIMING OF THE SQUALLS

Before the snow squalls begin Monday, a weak clipper system is forecasted to move across Southern Ontario late Sunday into early Monday morning. While this system will lack significant moisture, it may bring light snowfall of 2 to 5 cm in most areas, with localized pockets potentially reaching up to 5 cm.

In the wake of the clipper, lake-effect snow is expected to ramp up east of Georgian Bay on Monday afternoon. Initially, the snow may be disorganized, spreading moderate to heavy snowfall across Muskoka and parts of Grey and Bruce counties.

By Monday evening, forecast models indicate the formation of a more organized snow squall. This band is expected to stretch from the Bruce Peninsula across Georgian Bay and inland between MacTier and Parry Sound.

The squall could remain stationary overnight, leading to rapid snowfall accumulation at rates of 5 to 10 cm per hour.

Model projections differ slightly regarding the exact placement of the most intense squall. The American model places the heaviest snow over Parry Sound, Pointe au Baril, Sprucedale, and Burk’s Falls.

Meanwhile, the Canadian model suggests the squall may shift south after midnight, targeting areas such as Port Carling, Rosseau, Port Sydney, and Bracebridge for the heaviest snowfall.

Both models agree that the squall will gradually sink southward by late Tuesday morning, bringing heavy snow to northern Simcoe County, including Midland and Orillia.

However, there is uncertainty about the intensity and duration of the squall as it moves further south into Barrie.

While Georgian Bay will see the most intense squalls, Lake Huron is also expected to generate less intense snow bands Monday evening into Tuesday morning. These bands could impact Owen Sound, Kincardine, and Hanover, with bursts of heavy snow.

As the wind shifts southward, areas like Goderich and London may briefly experience lake-effect snow Tuesday morning into the afternoon.

WHO COULD GET BURIED IN SNOW

As is typical with lake-effect snow, snowfall totals will vary widely depending on where the narrow bands persist. The highest accumulations are expected in Parry Sound, Rosseau, Port Carling, Port Sydney, Bracebridge, and Gravenhurst, where 25 to 50 cm of snow is possible by Tuesday afternoon.

In some areas, totals could exceed 50 cm if the squall remains stationary for an extended period.

Surrounding areas such as Midland, Washago, Coboconk, Minden, Huntsville, and Sprucedale may see snowfall totals of 15 to 25 cm.

The Grey-Bruce region, including Kincardine, Port Elgin, Wiarton, Lion’s Head, Tobermory, Owen Sound, Chatsworth, Hanover, and Meaford, is expected to receive 15 to 25 cm, with localized totals of 30 to 40 cm if squalls intensify.

Elsewhere in Central and Southwestern Ontario, snowfall amounts will range from 5 to 15 cm, combining accumulation from the weak clipper system and lake-effect snow. Most areas will see closer to 5 cm, with lake-effect zones reaching 10 to 15 cm.

Less than 5 cm is expected for the rest of Southern Ontario.

SNOW SQUALL WATCH ISSUED BY ENVIRONMENT CANADA

CURRENT ENVIRONMENT CANADA ALERTS AS OF SUNDAY EVENING

Environment Canada has issued snow squall watches for areas around Lake Huron, Georgian Bay, and Lake Superior.

The highest totals in these watches match our forecast, with 20 to 40 cm expected for Parry Sound and Muskoka and 15 to 25 cm for the Grey-Bruce region.

Northern Ontario, including Sault Ste. Marie and Manitoulin Island could see localized snowfall of 10 to 20 cm from Monday evening into Tuesday morning.

LOOKING AHEAD TO THE REST OF JANUARY

The persistence of lake-effect snow this far into January may seem unusual, but the Great Lakes remain relatively ice-free and warmer than usual due to a mild fall and warm start to winter. This provides ample moisture for snow squalls when Arctic air moves in.

**ICE COVERAGE MAP AS OF JANUARY 11, 2025** - source: NOAA

Colder weather in recent weeks has helped cool the lakes and increased ice coverage, particularly in shallower areas like Lake Erie and the shorelines of Lake Huron and Georgian Bay.

Ice coverage has risen from 1% at the start of January to over 10% as of January 11.

**TEMPERATURE ANOMALY** - MAP FROM WEATHERBELL

Looking ahead, a significant Arctic blast is expected during the January 20–24 period, with temperatures 10 to 20 degrees below seasonal norms across much of Southern Canada and the northern U.S.

Southern Ontario could experience lows well below -20°C, potentially nearing -30°C in some areas. Wind chills could make it feel as cold as -35°C to -40°C, particularly in Central and Eastern Ontario.

This intense cold will likely bring additional snow squalls and accelerate ice formation on the Great Lakes. If current trends continue, lake-effect snow activity could diminish significantly by the end of the month as ice coverage increases, shutting off the moisture source for squalls.

For snowbelt residents weary of lake-effect snow, relief may finally be on the horizon!

January 09, 2025

Widespread Snowfall to End the Week Across Southern Ontario on Friday; Up to 5-10cm Possible

January 09, 2025/ Brennen Perry

While 2025 began with heavy snow across parts of Southern Ontario, most of the activity so far has been confined to traditional snowbelt regions. That’s about to change, as a new system is set to bring the first widespread snowfall of the year to much of Southern Ontario starting Friday.

Most of Southwestern, Central, and Eastern Ontario can expect snowfall totals of 5 to 10 cm between Friday afternoon and Saturday morning. However, areas along the Lake Huron shoreline and into the Bruce Peninsula may see enhanced snowfall, with totals reaching 10 to 20 cm due to lake-effect activity and embedded snow squalls.

As the system moves out, additional snowfall is likely over the weekend. Lake-effect snow squalls developing southeast of Lake Huron and Georgian Bay could bring localized accumulations of 20 to 30 cm from Saturday afternoon into Sunday.

SNOWFALL TIMING

The system-related snowfall will begin spreading into Southwestern Ontario late Friday afternoon, with regions near Lake Huron, including Deep Southwestern Ontario, seeing snow first.

Through the dinner hours, the snow will advance northeast, gradually reaching the Golden Horseshoe and portions of Central Ontario by Friday evening. By midnight, snow will cover most of Southern Ontario, extending into Eastern Ontario.

The most intense period of snowfall is expected overnight Friday into early Saturday morning. While the snow will generally be light, it could lead to several hours of steady accumulation, potentially impacting travel.

Exercise caution if you plan to drive during this time, and remember to adjust your speed to match road conditions.

For areas along the Lake Huron shoreline and into the Bruce Peninsula, lake-enhanced snowfall could intensify during the evening and overnight hours on Friday, resulting in heavier accumulations compared to surrounding areas.

Snowfall from this system will taper off from west to east starting early Saturday morning in Southwestern Ontario, with Eastern Ontario holding onto snow until late morning.

Flurries may linger into Saturday afternoon, especially in some regions.

As the system exits, lake-effect snow squalls may develop off Lake Huron and Georgian Bay by Saturday afternoon. Forecast models currently show some uncertainty about how organized these squalls will be and whether they will lock into specific areas for prolonged periods.

Higher-resolution models are just coming into range, so a detailed forecast for snow squall activity will be issued on Friday.

HOW MUCH SNOW TO EXPECT

In terms of totals, most of Southern Ontario will see 4 to 8 cm of snowfall, with slightly higher amounts of up to 10 cm possible in localized areas. This includes the east end of the Greater Toronto Area (GTA), such as Oshawa, and parts of Southwestern Ontario due to minor lake enhancement from Lake Ontario and Lake Huron.

The Golden Horseshoe and Ottawa Valley are expected to see slightly lower snowfall amounts, closer to 3 to 6 cm.

A zone along the Lake Huron shoreline—including Grand Bend, Goderich, Kincardine, and the Bruce Peninsula—could see locally higher accumulations by Sunday afternoon. Current estimates suggest 10 to 15 cm for these areas, with up to 20 cm possible for the Bruce Peninsula.

WEEKEND SNOW SQUALL PREVIEW

Environment Canada has identified areas near Barrie, Goderich, and London as hotspots for the most intense snow squalls over the weekend.

Here’s Environment Canada’s weekend outlook:

Saturday, January 11, 2025: “Lake effect snow squalls off Lake Huron and Georgian Bay are expected to develop Saturday afternoon. Local snowfall amounts of 10 to 15 cm are possible along with reduced visibility in heavy snow.”
Sunday, January 12, 2025: “Lake effect snow squalls off Lake Huron and Georgian Bay are expected to continue on Sunday. Local snowfall amounts of 10 to 15 cm are possible along with reduced visibility in heavy snow.”

As always, stay tuned for updates, especially if you’re in areas likely to experience lake-effect snow. Stay safe, and plan ahead for winter driving conditions!

January 07, 2025

Retrograding Storm Returns to the Maritimes, Bringing Up to an Additional 30cm of Snow

January 07, 2025/ Alannah Campbell

It seems as though the storm from the weekend isn’t quite finished with the Maritimes. There have been scattered flurries across the region throughout the day Tuesday, but more organized bands of snow are on their way.

The snow will move into Northern New Brunswick from the north early Wednesday morning and spread southward into the region. By sunrise, the snow will reach Prince County, PEI and then Northern Nova Scotia by the early afternoon. This band of snow will last for up to 12 hours, but the snow will be light and come in bursts, resulting in up to 5cm of accumulation.

In the late afternoon and early evening, a second band of snow will push southward into Northern New Brunswick and following the same path as the first. This round will bring another 12 hours of steady snow across the region before starting to dissipate early Thursday morning. There will be pockets of heavier snow in this second wave, which will drive snowfall totals above 10cm in some parts of the Maritimes.

The snow will taper off throughout Thursday morning, but in the late morning to early afternoon, one final round of precipitation will move in. This third and final round will arrive after temperatures climb above freezing, resulting in mostly rain falling, but a bit of snow mixed in, across the Maritimes Thursday afternoon and into early Friday morning.

From these three rounds of precipitation, we’re looking at widespread snowfall totals of 5-20cm across the Maritimes. There will be areas where the snow will persist into late Thursday morning from the second round of snow, particularly the Annapolis Valley and at higher elevations in Northern New Brunswick. There will also be areas where more snow than rain will fall in the third round, namely the Northumerland Shore and the Cape Breton Highlands. The Highlands will see the most snow, up to 30cm, due to steady and often heavy snowfall over the duration of this event.

January 07, 2025

Mid-Week Squalls Could Dump Up to 25-50cm of Snow to Parts of Southwestern Ontario by Thursday

January 07, 2025/ Brennen Perry

The New Year has certainly started on a frigid note across Ontario, as Arctic air has firmly settled over the region in recent days. These cold temperatures, combined with open lakes, have created the perfect conditions for lake-effect snow. Late last week and into the weekend, parts of the province experienced significant snowfall, with totals southeast of Georgian Bay reaching or exceeding 50 cm.

Over the past 24 hours, the lake-effect machine has largely taken a break, aside from some minor activity south of Lake Huron and Georgian Bay. However, that respite will be short-lived. Beginning Tuesday evening, snow squalls are expected to return with a vengeance as wind directions realign and even colder air moves into the region. These squalls are anticipated to persist through Wednesday and into early Thursday before tapering off.

This round of lake-effect snow will likely target areas that were largely spared during the last event. The focus this time will be on regions southeast of Lake Huron and along the southern shoreline of Georgian Bay. Some of the hardest-hit areas could include London and Collingwood, with snowfall totals potentially ranging from 25 to 50 cm over the next 48 hours.

As for the timing, models differ slightly on the intensity and precise placement of the squalls. The latest data suggests snow squalls could begin organizing as early as Tuesday evening. The squall off Georgian Bay is expected to impact the Collingwood and Blue Mountain area, stretching inland toward Creemore, Alliston, and Shelburne. It may also affect the Highway 400 corridor just south of Barrie.

Meanwhile, activity off Lake Huron could produce multiple squalls developing between Kincardine and Grand Bend, with bands extending inland in a southeasterly direction. This puts portions of Huron, Perth, and Middlesex counties in the crosshairs.

The Georgian Bay squall appears to be somewhat weaker than its Lake Huron counterpart, likely due to the smaller lake surface area supplying moisture. That said, it is expected to remain relatively stationary through the overnight hours into Wednesday, resulting in steady snowfall accumulation and reduced visibility.

Travel in this area will likely be challenging from Tuesday night into Wednesday, with little improvement expected until the activity begins to subside overnight.

Lake Huron squalls, on the other hand, are expected to shift around more frequently, spreading out snowfall accumulations. By Wednesday morning, the primary squall is forecasted to come ashore around Grand Bend, extending inland toward Lucan, Strathroy, and London.

There is still some uncertainty about whether the squall will directly impact the City of London or remain just northwest. Western parts of the city are likely to see the heaviest snowfall, while eastern areas may receive lighter accumulations.

Scattered snow squalls east of Lake Huron are expected to continue affecting Huron and Perth counties throughout Wednesday. These squalls may vary in intensity, and if one becomes particularly organized and stalls over an area, rapid snowfall accumulation could occur.

The most intense conditions are expected during the day on Wednesday, extending into the evening and overnight hours.

By midnight, the lake-effect activity is expected to become more localized. The Georgian Bay squall will likely retreat closer to the shoreline, while the Lake Huron squalls may consolidate into a narrower band near Grand Bend, extending into the London area.

While this will reduce the overall impact, areas caught under these more focused squalls could experience increased snowfall rates for several hours overnight into early Thursday morning.

By pre-dawn Thursday, the lake-effect activity is anticipated to taper off, with the Georgian Bay squall dissipating before sunrise and the Lake Huron squall following a few hours later.

Snowfall totals from this round of snow squalls will vary widely, as is typical with these events. This forecast is particularly tricky due to discrepancies in model data regarding the intensity of the snow bands, which will significantly affect accumulation.

Based on the current environment and dynamics, there is potential for 25 to 50 cm of snow in areas such as London, Lucan, Grand Bend, Clinton, and Collingwood. However, these totals are not guaranteed, as exact amounts will depend on where the bands set up.

For London, in particular, snowfall accumulations will likely be heavier in the northwest, while eastern areas may only see totals between 10 and 25 cm.

Surrounding areas like Goderich, Point Clark, Mitchell, Strathroy, and St. Thomas could see localized accumulations of 15 to 25 cm, depending on the positioning of the bands. Similarly, areas southwest of Barrie, including Angus, Alliston, and Beeton, may receive 10 to 20 cm as the Georgian Bay squall extends inland.

Outside these regions, significant snowfall is not expected due to the highly localized nature of lake-effect activity. However, portions of Eastern Ontario near the U.S. border and areas east of Ottawa may see 5 to 10 cm of accumulation on Wednesday due to a separate system lingering over Quebec.

January 04, 2025

First Major Winter Storm of the Year is Taking Aim at Cape Breton Island With Over 50cm of Snow Possible

January 04, 2025/ Alannah Campbell

The new year is starting off with a bang in parts of the Maritimes with the arrival of a major winter storm. While Newfoundland will feel the brunt of the storm, Eastern Nova Scotia and Prince Edward Island can expect a significant amount of snow and strong winds throughout the day Sunday and into Monday. The rest of the Maritimes, meanwhile, will experience little to no impacts from the storm.

The storm has been rapidly intensifying during its approach towards Atlantic Canada throughout the day Saturday, meeting the criteria of a bomb cyclone (a drop in internal pressure of at least 24mb in 24 hours).

The western edge of the storm will briefly skim along the far eastern coast of Cape Breton Island early Sunday morning as the storm surges north towards Newfoundland, bringing snow and wind gusts of 70-90km/h. The storm will continue to grow in size as it gains latitude, which will push the snowfall and intense winds deeper into Cape Breton as the morning progresses.

By the mid-morning, the storm is expected to shift and start moving along a more northwesterly track, which will bring the snow and strong winds into Eastern Mainland Nova Scotia, across Prince Edward Island, and briefly to the eastern tip of the Acadian Peninsula. Blowing snow will greatly reduce visibility across the area throughout the day and could even lead to blizzard conditions.

The storm will gradually lose momentum later in the afternoon before completely stalling for several hours in the late evening and overnight. This will result in the impacted areas of PEI and Nova Scotia seeing snow quickly accumulate and the strong winds continuing while also limiting how far westward into the rest of the Maritimes that the snow spreads.

***Model run showing Snow (Blue) and Rain (green) at 11pM on Sunday, January 5th***

At around sunrise on Monday morning, the storm will start to fall apart, with the snow tapering off and the winds dying down across PEI and Mainland Nova Scotia throughout the morning. By the early afternoon, the only snow falling will be in the Cape Breton Highlands, where it will continue until the late evening.

The Cape Breton Highlands will be the hardest hit area and heavy snow is expected to fall for 24 hours at up to 5cm/hr, leading to over 50cm of accumulation here. This area will also see the strongest wind gusts from the storm, up to 100km/h, making travel very treacherous and possibly resulting in power outages.

January 03, 2025

Snow Squall Blast Continues This Weekend as Parts of Southern Ontario Could See an Additional 25-50cm of Snow

January 03, 2025/ Brennen Perry

The New Year has certainly started on a snowy note for parts of Ontario's snowbelt regions. A multi-day snow squall event is underway around Lake Huron and Georgian Bay, with some areas already receiving over 50 cm of snow. Locations east of Lake Huron, Simcoe County, and parts of Kawartha Lakes have been among the hardest hit so far.

While the activity off Georgian Bay weakened somewhat on Friday evening, it's expected to ramp up again by Saturday afternoon and continue through Sunday. Snow squalls will also persist east of Lake Huron Friday night into Sunday, though the bands will shift around multiple times during this period.

By the end of the weekend, some areas could see an additional 25 to 50 cm of snow, with localized totals reaching as high as 75 cm. Combined with the snow that has already fallen, totals in the hardest-hit regions could exceed one meter (100 cm). This includes parts of Simcoe County, where 50 to 75 cm of snow has already accumulated over the past two days.

As of Friday evening, multiple discrete squalls off Lake Huron are bringing heavy snow to areas stretching from Bayfield to Kincardine and as far inland as Woodstock, Kitchener, and Guelph. This activity is expected to continue through the night, with southern squalls gradually merging northward by early Saturday morning.

The New Year has certainly started on a snowy note for parts of Ontario's snowbelt regions. A multi-day snow squall event is underway around Lake Huron and Georgian Bay, with some areas already receiving over 50 cm of snow. Locations east of Lake Huron, Simcoe County, and parts of Kawartha Lakes have been among the hardest hit so far.

While the activity off Georgian Bay weakened somewhat on Friday evening, it's expected to ramp up again by Saturday afternoon and continue through Sunday. Snow squalls will also persist east of Lake Huron Friday night into Sunday, though the bands will shift around multiple times during this period.

By the end of the weekend, some areas could see an additional 25 to 50 cm of snow, with localized totals reaching as high as 75 cm. Combined with the snow that has already fallen, totals in the hardest-hit regions could exceed one meter (100 cm). This includes parts of Simcoe County, where 50 to 75 cm of snow has already accumulated over the past two days.

As of Friday evening, multiple discrete squalls off Lake Huron are bringing heavy snow to areas stretching from Bayfield to Kincardine and as far inland as Woodstock, Kitchener, and Guelph. This activity is expected to continue through the night, with southern squalls gradually merging northward by early Saturday morning.

By Saturday morning, an intense squall is expected to form between Sauble Beach and Kincardine, extending inland to areas such as Hanover, Dundalk, and Orangeville. This band may stretch as far east as the western GTA, including Mississauga and Brampton.

While overall accumulations in the GTA should remain around 5 cm or less, these squalls could still lead to near-zero visibility and hazardous travel conditions due to blowing snow.

For Georgian Bay, lingering lake-effect activity will continue Friday night into Saturday morning, though no significant squalls are expected until later in the day.

By mid to late Saturday afternoon, the Lake Huron squall is expected to shift northward as wind directions change. This will allow it to cross over the southern Bruce Peninsula and connect with Georgian Bay, bringing heavy snowfall to Simcoe County, particularly in the Barrie-Orillia corridor.

This squall may also extend into parts of northern York and Durham regions, as well as the Kawartha Lakes region.

As seen earlier in this event, the squall is expected to lock in place, leading to intense snowfall rates of 5 to 10 cm per hour late Saturday through Sunday. Driving conditions will deteriorate rapidly, and non-essential travel should be avoided due to the potential for road and highway closures.

By late Sunday morning, the Georgian Bay squall is expected to sink southward, bringing an end to the snow for areas southeast of the bay. Moderate to heavy lake-effect snow may persist in parts of Grey and Bruce counties throughout Sunday, with activity finally tapering off overnight into Monday morning.

The heaviest snowfall totals are expected in areas such as Wiarton, Owen Sound, Kincardine, Hanover, Meaford, Collingwood, Wasaga Beach, Midland, Barrie, Orillia, and Beaverton. These regions could see an additional 25 to 50 cm of snow by the end of the weekend, depending on the squall locations.

Surrounding areas, including Goderich, Woodstock, Stratford, Kitchener, Guelph, Angus, Bradford, Lindsay, and Port Perry, may also see significant snowfall if the squalls align. These areas could receive 15 to 25 cm of snow, though amounts will vary widely due to the localized nature of snow squalls. Our forecast is intentionally broad to account for potential shifts in squall placement.

Snowfall amounts will drop off quickly outside the snowbelt regions. However, parts of the northern and western GTA could see 5 to 10 cm, with isolated amounts up to 15 cm. Even Toronto might get a few centimeters of brief, heavy snow as the bands shift inland.

Eastern and Deep Southwestern Ontario are not expected to see any significant snowfall from this event.

January 03, 2025

A Brief Skiff of Snow Expected Across Parts of Southern Alberta & Saskatchewan for the First Weekend of the New Year

January 03, 2025/ Alannah Campbell

It’s been fairly quiet across the Prairies for the past few weeks and that trend has continued so far in the beginning of the new year. As we approach the first weekend of the year, there’s enough snow expected for parts of Southern Alberta and Saskatchewan over the next 24 hours to warrant a forecast.

The snow will begin to fall along the American border in Alberta early this evening and it will gradually spread north and eastward overnight and early Saturday morning. It is only going to reach as far north as Calgary and into Southwest Saskatchewan before the system starts to fall apart before sunrise Saturday morning. The snow will gradually taper off throughout the morning and into the early afternoon.

The snow is expected to be light throughout the duration of the event, leading to most of the area receiving 5-10cm of accumulation. As the system falls apart Saturday morning, the snow is expected to linger over parts of Southeast Alberta and Southwest Saskatchewan, resulting in over 10cm of snowfall here.

January 01, 2025

Snowy Start to 2025 in Ontario’s Snowbelt; Squalls Could Deliver Up to 50cm of Snow by End of Week

January 01, 2025/ Brennen Perry

As we kick off the New Year across Ontario, we’re starting off with a blast of cold Arctic air that moved into the region over the past 24 hours. With this chilly air comes the inevitable return of lake-effect snow in the traditional snowbelt areas surrounding Lake Huron, Georgian Bay, and Lake Superior.

Strong snow squalls are anticipated to develop Wednesday evening and are likely to persist through Thursday and into Friday. These squalls are expected to bring intense snowfall rates of 5-10 cm per hour, along with near-zero visibility that will make travel nearly impossible in the hardest-hit areas.

The main focus for this lake effect activity will be in parts of Huron, Perth, Grey, Bruce, and Simcoe counties. Depending on where these narrow snow bands establish, localized accumulations could approach or exceed 50 cm by week’s end, with additional snowfall possible through the weekend as the lake effect machine remains active.

Disorganized squalls are expected to begin forming off Lake Huron and Georgian Bay late Wednesday evening or around midnight. According to the latest data, multiple bands could develop off Lake Huron, with one possibly targeting areas south of Owen Sound.

Another band may stretch from Goderich inland towards Stratford and St. Marys, just north of London. However, there remains some uncertainty about where exactly these squalls will set up, which will determine the heaviest snowfall locations.

For Georgian Bay, models show differing timelines. One suggests squall activity could begin just after midnight, while another predicts development near sunrise on Thursday. If squalls form, areas like Wasaga Beach and Barrie could be affected overnight.

Overnight, the bands that do form may shift around and dissipate periodically, spreading snowfall over a broader area. If a squall locks into place unexpectedly, snowfall can accumulate rapidly in a short time.

The event is expected to intensify by mid to late Thursday morning as the northern squall off Lake Huron drifts northward, potentially crossing the Bruce Peninsula and reconnecting over Georgian Bay. This setup could lead to a rare "multi-lake connection," allowing the squall to draw moisture from a long stretch of open water.

The result would be heavy snowfall affecting areas such as Owen Sound, Collingwood, Wasaga Beach, and Barrie, with possible extensions into Durham Region and southern Kawartha Lakes.

Another squall off Lake Huron could extend inland into Huron and Perth counties, with potential impacts as far as Kitchener-Waterloo. While intense snowfall could occur, squalls are notoriously narrow, and not all areas will be directly affected.

By late Thursday afternoon, snow squalls off Lake Huron may weaken as the wind shifts more westerly, reducing the available lake surface from which the squalls can pull moisture. The Georgian Bay squall, however, could continue intensifying and shift northward, potentially impacting areas like Midland and Orillia while giving Barrie a break.

There remains uncertainty regarding the squall's position, with some models suggesting it may remain south of Orillia. If the squall locks in place overnight, areas such as Simcoe County and southern Kawartha Lakes could see prolonged periods of heavy snow, leading to extremely poor travel conditions, potential road closures, and significant snowfall accumulations.

By late Friday morning, shifting winds are expected to push the Georgian Bay squall southward, potentially dissipating it by midday. However, lake effect activity off Lake Huron may persist southeast of the lake into areas like Kitchener and London through Friday afternoon and evening.

The hardest-hit regions from this event will likely include Grey-Bruce and southern and central Simcoe County, including Wasaga Beach and Barrie. Snowfall totals in these areas could range from 25 to 50 cm by Friday night.

Some localized spots, particularly between Barrie and Orillia, may see totals exceeding 50 cm, with the potential for as much as 75 to 100 cm. However, model disagreement prevents us from confidently forecasting such extreme totals.

It’s important to note that snow squalls are highly localized phenomena, often only a few kilometres wide. While our forecasts aim to highlight the most likely zones, the reality is that squalls can shift unexpectedly, meaning not every location in a forecasted zone will see the same impacts.

Surrounding areas, including Orillia, Lindsay, Fenelon Falls, and Port Perry, could see localized snowfall of 15-25 cm from the Georgian Bay squall, with totals tapering quickly outside of this zone. Peterborough and areas along the Lake Ontario shoreline between Oshawa and Brighton may see 5-15 cm.

For regions east of Lake Huron, a narrow band from Goderich to Wingham and Listowel could see 25-50 cm of snow, with some extension into Kitchener, where totals may approach 15-20 cm. However, the exact setup will depend on the squall’s inland reach.

Elsewhere, the Golden Horseshoe could see a few centimeters of snow from brief, heavy bursts of lake effect activity, but no significant accumulations are expected. Areas north of Bracebridge, east of Peterborough, and south of Woodstock are likely to see little to no snow.

As always, lake effect snow forecasts carry inherent uncertainty. While many areas may receive less snow than forecasted, those directly in the path of these intense squalls could see the full brunt of the snowfall. Be prepared for rapidly changing conditions, and avoid non-essential travel in the hardest-hit zones.

Snow squalls are also expected to affect regions east and southeast of Lake Superior in Northern Ontario starting Wednesday evening. These squalls will continue to persist throughout the day on Thursday before shifting south of the border.

The Sault Ste. Marie region appears to be in the bullseye and could see localized snowfall totals between 25 to 50cm by the time the snow tapers off late Thursday.

December 31, 2024

Heavy Snow Could Impact New Year’s Eve Celebrations in Southern Ontario With Up to 10-20cm of Snow

December 31, 2024/ Brennen Perry

After a brief return to milder weather accompanied by heavy rain to cap off the final weekend of the year, a snowy blast is on the horizon to kick off the first few days of 2025.

A system is expected to move into Southern Ontario starting Tuesday afternoon, bringing a mix of precipitation that will gradually transition to snow as we ring in the New Year at midnight. For those heading out to celebrate New Year’s Eve, road conditions may become hazardous, particularly later in the evening as temperatures drop below freezing.

Snowfall is expected to continue throughout New Year’s Day on Wednesday, with the heaviest accumulation focused on parts of Central and Eastern Ontario. By the time the snow tapers off late Wednesday, some areas could see snowfall totals nearing 10 to 20 cm in the hardest-hit regions.

In the wake of this system, frigid Arctic air is set to return, dominating the weather pattern for at least the first week of 2025. With the Great Lakes still largely unfrozen, the lake-effect snow machine is expected to roar back to life, potentially resulting in a multi-day snow squall event.

Starting Thursday and continuing into the weekend, some areas in the traditional snowbelt regions near Lake Huron and Georgian Bay could see significant snowfall, with totals approaching 50 cm by the end of the weekend.

The New Year’s Eve system is forecast to bring the first scattered bands of precipitation into the region from the south and west during the early to mid-afternoon hours on Tuesday. Areas in Deep Southwestern Ontario and near the Lake Erie shoreline will be affected first, with the precipitation gradually spreading across Southern Ontario by the dinner hour.

At this time, most regions are expected to hover near or just above the freezing mark, particularly in the Golden Horseshoe, where temperatures are likely to range between 3 and 5°C. As a result, the precipitation will likely begin as scattered rain or drizzle in many areas.

However, higher elevations northwest of the Greater Toronto Area (GTA) and into Central Ontario may see a mix of rain, ice pellets, and wet snow as temperatures there will be closer to freezing.

By the evening, the heaviest precipitation is expected to be concentrated east of Lake Huron, extending into Central Ontario. This will increasingly fall as wet snow as temperatures cool. Meanwhile, regions near the shores of Lake Ontario and Lake Erie will see less sustained precipitation, with rain continuing to dominate, especially near the lakeshore.

As the clock strikes midnight to welcome the New Year, heavy snow will continue in Central & Southwestern Ontario, while moderate to heavy rain will likely persist along the Lake Ontario and Lake Erie shorelines, dampening New Year’s Eve celebrations in the GTA and Niagara region.

Overnight, the precipitation is expected to transition to heavy, wet snow across most areas as colder air moves in behind the system. However, areas close to the Lake Ontario shoreline, including Hamilton, Toronto, and Kingston, may continue to experience rain into the early hours of Wednesday. Wet snow may mix in later in the morning, but periodic rain is likely as temperatures hover near freezing throughout Wednesday afternoon.

Moderate to heavy snow is forecast to persist through Wednesday in Eastern and Central Ontario, tapering off in Southwestern Ontario by the evening. In Eastern Ontario, steady snow could continue past midnight, finally ending early Thursday morning. Some lake-effect snow may develop off Lake Huron and Georgian Bay as early as Thursday morning.

Snowfall totals are challenging to predict for this system due to temperatures hovering close to freezing, which could significantly impact snow accumulation. A slight shift in temperatures could cause the system to overperform or underperform expectations.

The highest snowfall totals are expected in higher elevations of Central and Eastern Ontario, including Sundridge, Huntsville, Algonquin Park, North Bay, Deep River, and Bancroft. These areas could see between 10 and 20 cm of fresh snow by Thursday morning.

A wide swath of Southern Ontario, including much of Eastern Ontario, the Lake Simcoe region, and parts of Southwestern Ontario, is forecast to receive between 5 and 10 cm of snow. Localized areas may exceed 10 cm and approach 15 cm.

Around 2 to 5 cm of snow is expected for Ottawa, Brockville, Kingston, Belleville, and the northern GTA (away from the shoreline), where mixing will reduce overall snowfall amounts.

Limited accumulation is expected near the shorelines of Lake Ontario and Lake Erie, as well as in Deep Southwestern Ontario, including Windsor and Chatham, where temperatures will likely remain too mild for significant snow accumulation.

After the system snow, attention will shift to the risk of snow squalls beginning Thursday and lasting several days into the weekend. Snow squalls are highly localized events, often producing intense snowfall within narrow bands only a few kilometres wide which can make it hard to pinpoint exactly who will see the worst conditions.

Current models suggest a dominant northwesterly wind direction for much of this period, historically favouring heavy snowfall in parts of Grey and Bruce counties off Lake Huron. Squalls off Georgian Bay are expected to target Simcoe County (Midland, Orillia, Barrie), Muskoka (Bracebridge, Gravenhurst), and the Kawartha Lakes region.

Locations such as Orillia, Midland, Wasaga Beach, Wingham, Mildmay, Hanover, Chatsworth, Owen Sound, and Flesherton could see up to 50 cm of snow by the end of the weekend. However, not all areas will experience these extreme totals due to the localized nature of snow squalls.

Stay tuned for updates as higher-resolution models provide more precise forecasts. For now, be aware that travel in snowbelt regions could be significantly impacted starting Thursday, with the potential for rapid snowfall accumulation and blowing snow leading to near-zero visibility and possible road closures.

December 23, 2024

One Last Pre-Holiday Blast of Winter Could Make Travel Difficult in the Maritimes with up to 30cm of Snow

December 23, 2024/ Alannah Campbell

There’s more snow on the way for the Maritimes following the storm over the weekend. The next system that will hit tomorrow, Christmas Eve, and continue into Christmas morning, will once again negatively impact the holiday travel plans for many across the region.

New Brunswick

The snow will start to push into Western New Brunswick around midnight tonight and spread eastward across the province before sunrise tomorrow. By that point, the snow will already have tapered of in the Northwest, leading to less than 5cm of accumulation in this area. As we progress through the morning, the snow will start to gradually diminish across western parts of Northern and Central New Brunswick as the system tracks southeastward.

Meanwhile, a bit of intensification is expected, leading to much of the province receiving over 10cm of snow by the end of the day. Pockets of particularly heavy snow are likely through the afternoon along the Fundy Coast, with the snow falling at up to 5cm/hr. This is expected to bring snowfall totals to over 20cm for this area, including Saint John, and over 30cm locally in areas of higher elevation.

The system will continue tracking southeastward across the province throughout the afternoon and early evening, at which time the entire system starts to fall apart. This will lead to scattered flurries lingering overnight and the early morning in Southeast New Brunswick.

Prince Edward Island

The snow will start in PEI a couple of hours before sunrise in Prince County, spreading across the rest of the Island throughout the morning and into the early afternoon. By the time the snow reaches the eastern edge of Kings County in the mid to late afternoon, this area will see snowfall for only a few hours before the system starts to break down. As a result, this area can expect less than 5cm of snow while the rest of the Island will receive upwards of 10cm.

There could be some lingering flurries for PEI overnight and into Christmas morning, but these will only add on another centimetre or two to the final snowfall totals.

***Model run showing Snow (Blue) and Rain (green) at 4pM on Tuesday December 24th***

Nova Scotia

The snow will make its way into both Northern and Western Nova Scotia from the northwest starting in the early morning before sunrise. It will push deeper across the province through the morning and early afternoon, but it is not expected to cross very far into Cape Breton, if at all. Isolated flurries can’t be completely ruled out here so our forecast is for up to 2cm of snow for this area.

The temperatures will rise throughout the day with the arrival of the storm and will climb above freezing in parts of Western Nova Scotia. Those living inland will see temperatures of 1°C, resulting in the buildup of heavier, wet snow. On the other hand, coastal communities in Yarmouth, Shelburne, and Queens Counties are expected to get up to 3°C and the snow will transition to rain, limiting overall snowfall totals to 5-10cm.

In the evening, the system will fall apart, leading to pockets of precipitation occurring across the Mainland for a few hours. Later into the evening and overnight, the snow is expected to persist over Western Nova Scotia and with temperatures remaining a degree or two above freezing, the snow that falls will be very wet and mixed with some rain. This will bring snowfall totals closer to 20cm and locally higher for parts of the Annapolis Valley.

This system is unfortunately very ill-timed and will really impact the plans that many people have to travel and visit family over the next couple of days. Thankfully, most of the snow will be finished by Christmas morning so day-of holiday travel shouldn’t be too tough.

Wind gusts should top out at about 50km/h on Tuesday, with the strongest gusts expected in Southern New Brunswick and Western Nova Scotia so visibility could be limited at times with brief whiteouts, but we won’t be at risk for full blizzard-like conditions.

Since the chances for a White Christmas across the Maritimes seem fairly obvious at this point, with Guysborough County and Southern Cape Breton just hitting the 2cm threshold along with the arrival of even more snow on Christmas Eve, we will not be updating our preliminary White Christmas Forecast. Enjoy your White Christmas everyone!

December 22, 2024

A Nightmare Before Christmas as Snowstorm Targets Southern Ontario on Monday With Up to 10-20cm of Snow

December 22, 2024/ Brennen Perry

Are you dreaming of a White Christmas? Well, it looks like luck is on your side as a snowy system is poised to sweep across Southern Ontario just days before Christmas. However, this snowfall won’t come without consequences, as it is expected to bring a significant amount of snow to some areas and could disrupt holiday travel plans right before Christmas.

Snow is anticipated to start early Monday and persist throughout the day, bringing moderate to heavy snowfall across a wide area of the region. Central and Eastern Ontario are likely to bear the brunt of this storm, with total snowfall amounts ranging from 10 to 20cm expected by early Tuesday morning.

In contrast, Deep Southwestern Ontario and areas along the Lake Ontario shoreline, including the Greater Toronto Area GTA, are expected to experience lesser impacts from this system. This is primarily due to the majority of the precipitation staying further north, and any moisture reaching the south being met with slightly warmer air, resulting in wetter snow and reduced accumulation.

According to the latest data, initial bands of snow are projected to move into the Bruce Peninsula and Georgian Bay areas by mid to late morning on Monday. The snow will then spread eastward, encompassing Eastern Ontario and all regions by early afternoon.

The heaviest snowfall is likely to be concentrated east of Georgian Bay, possibly enhanced by minor lake effects. By late afternoon, snowfall will also begin in Southwestern Ontario, with a chance of some mixing, including ice pellets and wet snow, particularly in Deep Southwestern Ontario around Windsor.

The most challenging conditions are expected during the afternoon and evening hours, as steady snow covers much of Southern Ontario. Occasional moderate wind gusts up to 40 km/h may lead to blowing snow and reduced visibility. If travel is necessary during this time, exercise extreme caution, and consider postponing travel until Tuesday when conditions are expected to improve significantly.

Temperatures are forecasted to gradually warm up during the evening, approaching the freezing mark around Lake Ontario and Lake Erie. This may cause existing snow to transition to a mix of wet snow and rain, potentially resulting in lower snowfall totals in these areas.

Light snow will continue past midnight into early Tuesday morning but will diminish in intensity as the night progresses. Western regions should see snow taper off shortly after midnight, while Eastern Ontario may experience lingering snow until late morning.

Overnight, there is concern about rain mixing in along the Golden Horseshoe as temperatures rise further, potentially melting any earlier snow and jeopardizing the chances of a White Christmas in those areas. We will closely monitor this development as it unfolds.

Snowfall accumulation is expected to range from 10-20cm across Central and Eastern Ontario, including areas like Grey-Bruce, Barrie, Orillia, Huntsville, North Bay, and the Ottawa Valley. Some localized spots, particularly east of Georgian Bay and into the Ottawa Valley, could see up to 25cm of snow.

Further south and west, 5-10cm of snow is anticipated east of Lake Huron, extending into the Golden Horseshoe away from the shoreline, including cities like London, Woodstock, Kitchener, Guelph, Mississauga, and Orangeville.

Toronto, Oakville, Burlington, Hamilton, the Niagara region, and Deep Southwestern Ontario, such as Chatham, Sarnia, and Windsor, are expected to receive less than 5cm of snow. Windsor may see minimal snow if the transition to rain occurs earlier than anticipated. There remains a possibility for the GTA to exceed forecasted amounts if cold air persists and prevents mixing.

Weather Forecasts & Articles