‘Snow Day’ Forecast: Freezing Rain Risk & Thick Fog on Friday May Give Some Students in Southern Ontario an Early Start to the Weekend

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A conditional freezing rain risk is expected to develop across parts of Southern Ontario during the evening on Thursday, with areas of drizzle continuing overnight into Friday morning. The greatest risk for icing currently appears to be around the western Greater Toronto Area and along the northern shoreline of Lake Ontario. However, there remains considerable uncertainty with the temperature forecast, which will ultimately determine how much ice is able to accumulate on surfaces.

If temperatures remain just above freezing, most of the precipitation will fall as plain rain or drizzle with minimal impacts. However, if temperatures dip even slightly below freezing, that drizzle could freeze on contact and produce slick road conditions across untreated surfaces.

In addition to the freezing rain risk, there are also indications that patches of fog could develop across parts of Southwestern Ontario overnight and linger into Friday morning. Fog can significantly reduce visibility on rural roads and highways, which may create hazardous travel conditions for the early morning commute.

When it comes to the potential impact on school buses, the timing of the freezing rain makes this a challenging forecast. Most of the precipitation is expected to taper off around or shortly after midnight for many areas. That would provide several hours for road crews to treat and clear surfaces before buses begin operating Friday morning.

However, localized icy patches could still linger, particularly in rural areas with untreated backroads. In addition, freezing drizzle is notoriously difficult for models to capture. Even after the main precipitation ends, light freezing drizzle could continue into the early morning hours, creating new icy spots that are difficult to anticipate in advance.

Because of these uncertainties, the highest probability for bus cancellations is focused on the more rural school boards north of Lake Ontario, where road conditions can take longer to improve.

At this time, we have assigned a toss-up probability of 50 percent for Northumberland County under the Kawartha Pine Ridge District School Board, as well as Belleville, Prince Edward County, South Lennox and Addington, and Kingston under Tri-Board Student Transportation Services. These areas are positioned close to where temperatures may hover near the freezing mark overnight, increasing the potential for icy conditions to develop on untreated roads.

A slight chance of 25 percent extends into surrounding regions, including Clarington and Peterborough County under the Kawartha Pine Ridge District School Board, and Central Hastings, Central Lennox and Addington, and South Frontenac under Tri-Board Student Transportation Services.

We have also assigned a slight chance for several regions within the Golden Horseshoe where some freezing rain may occur this evening. This includes North Niagara under the Niagara Region District School Board, Hamilton under the Hamilton-Wentworth District School Board, northern Halton under the Halton District School Board, Wellington County under the Upper Grand District School Board, and North Peel under the Peel District School Board.

These areas may experience some icing overnight if temperatures drop enough. However, their more urban nature, combined with the fact that precipitation is expected to end earlier in the night, makes it uncertain whether conditions will still be severe enough by Friday morning to warrant cancellations.

Because fog may also become an issue overnight in parts of Southwestern Ontario, we have included a separate slight chance for fog-related transportation disruptions. The highest probability we assign for fog events is 25 percent due to the localized nature of fog development.

This fog-related zone includes Oxford, Elgin and Middlesex counties under the Thames Valley District School Board, all regions within the Avon Maitland District School Board, Lambton County and Chatham Kent under the Lambton Kent District School Board, and Essex County under the Greater Essex County District School Board. If dense fog develops in these areas overnight, some rural transportation providers may choose to cancel or delay buses due to reduced visibility.

Across the remainder of Southwestern Ontario, Central Ontario, Eastern Ontario, and the rest of the Golden Horseshoe, we have assigned a widespread low to very low chance of cancellations.

While most areas in this zone are expected to have a normal school day on Friday, a few surprise cancellations cannot be completely ruled out. Localized freezing drizzle overnight, combined with falling temperatures, could allow earlier rainfall to freeze on road surfaces, producing isolated patches of black ice by the morning commute.

Ultimately, conditions will vary significantly from one community to another, and any decisions will come down to local road conditions early Friday morning.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow (Fog) Day’ Forecast for Thursday, March 5, 2026

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Thick fog is expected to redevelop across portions of Southwestern Ontario on Wednesday evening, with some of that fog potentially lingering into the early hours of Thursday morning.

This comes after dense fog led to widespread school bus cancellations across several rural school boards in the region on Wednesday morning. While the fog tonight does not appear to be as widespread or intense as last night, it may still be enough to cause visibility issues in some communities by Thursday morning.

Because of this, there remains the possibility that a few school boards could opt to cancel buses or delay service if visibility is significantly reduced during the early morning hours.

At this time, the most likely areas where a potential “fog day” could occur include Lambton County and Chatham-Kent under the Lambton Kent District School Board, Middlesex County under the Thames Valley District School Board, and all regions within the Avon Maitland District School Board.

These areas have historically shown a willingness to cancel buses when dense fog significantly reduces visibility along rural transportation routes. However, fog can be extremely difficult to forecast with precision. Conditions may be dense in one community while remaining relatively clear just a few kilometres away.

Because of this uncertainty, the highest probability we assign to fog-related cancellations is 25 percent. While cancellations are certainly possible in these regions, confidence is not high enough to suggest anything more widespread.

Elsewhere across Southwestern Ontario, we have assigned a low to very low chance of cancellations. Some patchy fog could still develop outside of the main fog-prone areas, but the likelihood of it becoming dense enough to trigger transportation decisions appears limited.

A similarly low probability extends into parts of Eastern Ontario along the northeastern shoreline of Lake Ontario. In particular, localized fog patches may develop near Kingston and surrounding rural communities under Tri-Board Student Transportation Services. However, the fog in this area is expected to be scattered and not widespread enough to pose a significant concern for school transportation.

Across the remainder of Southern Ontario, including the Golden Horseshoe, Central Ontario, and the Ottawa Valley, no impactful weather is expected during the school day on Thursday.

As a result, school bus cancellations are not expected in these regions, and most students across the province should be heading to school as usual.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow (Fog/Ice) Day’ Forecast for Wednesday, March 4, 2026

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Localized patches of thick fog are expected to develop across parts of Southern Ontario late Tuesday night and persist into Wednesday morning. In some areas, this fog could become quite dense, reducing visibility significantly during the early morning hours when school transportation decisions are typically made.

Adding to the concern is the potential for temperatures to hover near the freezing mark overnight. Where this occurs, freezing fog may develop, allowing tiny droplets of moisture to freeze on contact with cold surfaces. This can lead to a light glaze of ice forming on untreated roads, sidewalks, and rural backroads.

Because of the combination of reduced visibility and the possibility of icy patches, there is a chance that some school boards may opt to cancel buses or implement delayed starts on Wednesday morning. However, forecasting fog-related cancellations is notoriously difficult because fog can be extremely localized. One community may experience dense fog while a nearby town remains completely clear.

For that reason, no single region stands out as having a guaranteed chance of cancellations. Instead, the forecast leans toward scattered and localized decisions depending on where the fog becomes thickest and whether freezing fog creates slick road conditions.

As a result, the highest probability we are assigning anywhere in the region is a 25 percent chance.

This widespread 25 percent zone includes areas under the Greater Essex County District School Board, Chatham-Kent and Lambton County under the Lambton Kent District School Board, Middlesex, Oxford and Elgin counties under the Thames Valley District School Board, all regions within the Avon Maitland District School Board, and the southern portion of the Bluewater District School Board.

These areas are expected to see the most widespread fog development overnight and into early Wednesday morning. Many of these boards also cover large rural transportation zones where dense fog has historically prompted cancellations or delays due to safety concerns for bus drivers.

Outside of these regions, a broader low to very low chance extends across the remainder of Southwestern Ontario and into parts of Central Ontario. In these areas, patchy fog or localized freezing drizzle may still develop, potentially leading to isolated slick spots on untreated roads. However, confidence in widespread impacts is low, so these regions have been assigned only around a 5-10 percent chance of cancellations.

Across the Golden Horseshoe and the Ottawa Valley, conditions are expected to remain largely manageable. Urban school boards in these regions tend to have a much higher threshold for weather-related cancellations, and current forecasts do not suggest visibility or icing conditions will reach that level.

Because of this, bus cancellations are not expected across the Greater Toronto Area, Hamilton area, or Ottawa on Wednesday morning.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow Day’ Forecast for Tuesday, March 3, 2026

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No impactful winter weather is expected across Southern Ontario throughout the school day on Tuesday.

As a result, all regions have a less than 5 percent chance of school bus cancellations.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow Day’ Forecast for Monday, March 2, 2026

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No impactful winter weather is expected across Southern Ontario throughout the school day on Monday. While a cold warning is in effect for some areas, wind chills aren’t expected to reach the threshold to prompt cancellations.

As a result, all regions have a less than 5 percent chance of school bus cancellations.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow Day’ Forecast for Friday, February 27, 2026

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No impactful winter weather is expected across Southern Ontario throughout the school day on Friday.

As a result, all regions have a less than 5 percent chance of school bus cancellations.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow Day’ Forecast for Thursday, February 26, 2026

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Scattered lake effect snow continues this evening east of Lake Huron and Georgian Bay, with bands still producing localized bursts of heavier snow and reduced visibility in traditional snowbelt communities. The good news is that most of this activity is expected to weaken and shift offshore well before the Thursday morning commute.

For the majority of Southern Ontario, impacts to school transportation should be minimal by daybreak. However, given the nature of lake effect snow, which can be highly localized and stubborn, we can’t completely rule out a few surprise cancellations where bands linger a little longer than expected.

If we do see any cancellations on Thursday, the most likely location would be the Bruce Peninsula under the Bluewater District School Board. There is still the potential for a narrow band of snow squall activity to persist into the mid-morning hours in that area. That said, confidence in the exact placement and intensity of those bands is fairly low. Because of that uncertainty, we’ve assigned a 25 percent chance of bus cancellations for the Bruce Peninsula under BWDSB.

Elsewhere east of Lake Huron, including the remainder of BWDSB, along with nearby rural boards across Central Ontario, cancellations are very unlikely but not completely off the table. This includes areas under the Avon Maitland District School Board, the Simcoe County District School Board, the Trillium Lakelands District School Board, and the Near North District School Board, where light residual snow or drifting could leave a few untreated backroads slick early in the morning.

For these regions, we’ve gone with a 5 to 10 percent chance to account for the possibility of isolated, localized decisions based purely on road conditions rather than active weather. These would be true surprise cancellations and would depend entirely on how conditions look at the time decisions are made. In other words, don’t count on it.

Outside of the snowbelt and adjacent rural areas, no significant winter weather is expected during the school day on Thursday. Conditions across the Golden Horseshoe, Deep Southwestern Ontario, and Eastern Ontario should be quiet and manageable.

As a result, all other regions across Southern Ontario have been given a less than 5 percent chance of a snow day on Thursday. At this point, a regular school day is expected for nearly everyone, so yes, that means do your homework!

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

‘Snow Day’ Forecast: Widespread School Bus Cancellations Possible on Wednesday Across Southern Ontario Due to Alberta Clipper

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For an updated list of school bus cancellations & school closures, please visit our live article: https://instantweatherinc.com/article/2026/2/25/bus-cancellations

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An Alberta Clipper is forecast to move across Southern Ontario late Tuesday and continue into Wednesday morning. While overall snowfall totals are not expected to be extreme, generally in the 5 to 10 cm range, the timing of this system could still create travel headaches.

Snow is expected to fall overnight and linger into the early morning hours, which means roads may still be snow-covered during the Wednesday commute. On top of that, gusty winds may lead to areas of blowing snow, briefly reducing visibility and causing drifting on exposed rural routes.

Adding another layer of concern, lake effect snow is expected to redevelop through the day on Wednesday, particularly downwind of Lake Huron and Georgian Bay. That could bring another round of locally heavier snow to traditional snowbelt communities, with squalls potentially ramping up into the afternoon.

Because of the overnight system snow and the potential for lake effect snow to continue into the day, there is a realistic chance that some school boards will opt to cancel buses on Wednesday.

That said, confidence is not especially high. Snowfall totals in the 5 to 10 cm range are often manageable, and in many cases would not automatically meet cancellation thresholds. Much will depend on how quickly road crews are able to clear routes overnight and whether snowfall ends before decisions are made early Wednesday morning. Small shifts in timing or totals could easily change the outcome.

Our highest confidence for cancellations is focused on areas expected to see both system snow and continued lake effect impacts. This includes all regions under the Bluewater District School Board, as well as Parry Sound under the Near North District School Board. These areas sit closest to Lake Huron and Georgian Bay and are more likely to see persistent blowing and drifting snow. Because of this combined risk, we have assigned a 75 percent chance of bus cancellations.

Our toss-up zone is fairly large, reflecting the uncertainty surrounding this event. We have assigned a 50 percent chance to all regions under the Avon Maitland District School Board, Wellington and Dufferin counties within the Upper Grand District School Board, the Simcoe West and Simcoe North weather zones under the Simcoe County District School Board, Muskoka, Haliburton and North Kawartha Lakes under the Trillium Lakelands District School Board, East Parry Sound under the Near North District School Board, Peterborough County under the Kawartha Pine Ridge District School Board, North and Central Hastings, North and Central Lennox and Addington, and North, Central and South Frontenac under Tri-Board Student Transportation Services, along with the Madawaska region under the Renfrew County District School Board.

These are predominantly rural school boards where even 5 to 10 cm of fresh snow, combined with wind and lingering lake effect, could be enough to tip the balance toward cancellations. However, with totals not expected to be particularly high, it could just as easily result in a normal school day.

We have assigned a 25 percent chance to Middlesex and Oxford counties under the Thames Valley District School Board, the Waterloo Region District School Board, Guelph under the Upper Grand District School Board, the Simcoe Central and Simcoe South weather zones under the Simcoe County District School Board, Georgina under the York Region District School Board, North Durham under the Durham District School Board, South Kawartha Lakes under the Trillium Lakelands District School Board, Northumberland County under the Kawartha Pine Ridge District School Board, the remaining Tri-Board regions, the Upper Canada District School Board, the remainder of the Renfrew County District School Board, North Bay under the Near North District School Board, and all regions under the Rainbow District School Board.

These areas are expected to see lighter snowfall totals and fewer lake effect impacts. While we are leaning toward a regular school day in most of these regions, isolated surprise cancellations are still possible, particularly in parts of Eastern Ontario where snow may still be falling into the late morning.

Low to very low chances of cancellations extend across Deep Southwestern Ontario and the more urban school boards around the Greater Toronto Area, as well as Ottawa. Urban boards typically have a higher threshold for cancellations due to greater road treatment capacity and less reliance on long rural bus routes. At this point, this system does not appear strong enough to meet those higher urban thresholds.

Overall, Wednesday’s snow day potential will hinge on overnight cleanup and how quickly lake effect snow intensifies. While not a major storm by totals alone, the combination of timing, wind and localized squalls keeps the door open for scattered cancellations across parts of Southern Ontario.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow Day’ Forecast for Tuesday, February 24, 2026

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No impactful winter weather is expected across Southern Ontario throughout the school day on Tuesday.

As a result, all regions have a less than 5 percent chance of school bus cancellations.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow Day’ Forecast for Monday, February 23, 2026

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No impactful winter weather is expected across Southern Ontario throughout the school day on Monday.

As a result, all regions have a less than 5 percent chance of school bus cancellations.

While there is some lingering snow on Sunday evening, it should mostly dissipate by morning. With no major accumulation expected, it’s unlikely to have any impact on school buses on Monday morning.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

‘Snow (Fog) Day’ Forecast: School Bus Cancellations Possible in Eastern Ontario on Friday Due to Afternoon Snowfall

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For an updated list of school bus cancellations & school closures, please visit our live article: https://instantweatherinc.com/article/2026/2/20/bus-cancellations

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MAP UPDATED AT 7:45 PM BASED ON LATEST DATA

Another messy system is set to move across Southern Ontario on Friday, with the main focus this time shifting toward Central and Eastern Ontario. Widespread snowfall is expected to develop early Friday afternoon and continue into the evening hours, with general totals in the 10 to 15 cm range by the time it wraps up.

While these snowfall amounts are not extreme for mid-winter, they are certainly enough to create difficult travel conditions, especially during the afternoon commute. Roads could become snow-covered quickly, and visibility may be reduced at times as snowfall rates pick up.

When it comes to school bus cancellations, the timing of this event makes the forecast a little less straightforward. Most of the accumulating snow is expected to begin late in the morning or early in the afternoon, which means the morning bus run may occur before conditions significantly deteriorate.

Environment Canada has issued a special weather statement for parts of Central and Eastern Ontario, highlighting the potential for up to 10 cm of snow beginning late morning or early afternoon. That amount sits right near the threshold where many school boards begin to consider cancellations. However, without a formal snowfall warning in place, some boards may hesitate to act proactively.

Because of this, the presence or absence of upgraded alerts by Friday morning will likely play a major role in decision-making. If the special weather statement is upgraded to a snowfall warning before buses hit the road, the probability of cancellations would increase considerably.

For now, we are placing the more rural and historically proactive boards into the toss-up category with a 50 percent chance. This includes Peterborough County under the Kawartha Pine Ridge District School Board, North & Central Hastings, North & Central Lennox and Addington, and North, Central & South Frontenac under Tri-Board Student Transportation Services, as well as the Madawaska region under the Renfrew County District School Board. These areas rely heavily on rural routes and are more likely to cancel in anticipation of worsening afternoon conditions.

Surrounding regions carry a slightly lower probability at 25 percent. This includes all regions under Trillium Lakelands District School Board, Northumberland County under the Kawartha Pine Ridge District School Board, the rest of Tri-Board Student Transportation Services, the Upper Canada District School Board, the remainder of the Renfrew County District School Board.

In these areas, snowfall is expected, but the timing may allow for buses to run in the morning before conditions decline. We are leaning toward a normal school day for most of these boards, but a few may choose to cancel proactively based on forecast conditions and the active special weather statement.

We’ve also given a slight chance to Dufferin County under the Upper Grand District School Board. This is due to the possibility of freezing rain in higher elevation areas with slightly colder temperatures than the surrounding areas.

Farther west, we have assigned a widespread low chance, around 10 percent, for rural school boards in Southwestern Ontario. Some patchy fog may develop overnight and linger into Friday morning, which could reduce visibility on exposed rural roads. However, current indications suggest fog will not be as widespread or as dense as on previous mornings, keeping confidence too low to go higher than a low chance.

There is also a low chance for areas around Lake Simcoe, as there might be some icy conditions if temperatures are slightly colder than expected.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

‘Snow (Ice/Fog) Day’ Forecast: Persistent Freezing Drizzle Could Prompt Another Day of School Bus Cancellations in Southern Ontario on Thursday

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For an updated list of school bus cancellations & school closures, please visit our live article: https://instantweatherinc.com/article/2026/2/19/bus-cancellations

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As expected, Wednesday’s high-impact winter storm led to widespread school bus cancellations and even a handful of full school closures across Southern Ontario.

A messy mix of freezing rain, snow and ice pellets created hazardous travel conditions through much of the day, particularly across Southwestern Ontario and into parts of the Golden Horseshoe where icing was the dominant concern.

While the bulk of the steady precipitation has tapered off as we head into Wednesday evening, the story is not quite over yet.

An area of patchy freezing drizzle continues to linger across portions of Southwestern Ontario and around the Golden Horseshoe. With temperatures holding below freezing in many communities, that drizzle is freezing on contact, adding a fresh glaze of ice to untreated roads, sidewalks and driveways.

Even a thin layer of additional ice accretion can quickly undo progress made by road crews earlier in the day, especially along rural routes and backroads.

This freezing drizzle is expected to persist through much of the overnight and may not fully taper off until early Thursday morning. That means icy patches are likely to remain a concern for the morning commute, particularly outside of the major urban centres.

At the same time, areas that rise slightly above freezing overnight, including Deep Southwestern Ontario and regions near Lake Huron and Lake Erie, are likely to see the development of thick fog. In some locations, visibility could be reduced significantly during the pre-dawn and early morning hours. While fog does not always lead to cancellations, it has triggered bus delays or localized cancellations in more rural school boards in the past.

Because of this combination of freezing drizzle and fog, there is a realistic chance that some school boards opt to cancel buses on Thursday, or at a minimum, delayed service during the morning when visibility is at its worst.

The highest probability for bus cancellations is focused in the higher elevations of Southwestern Ontario and other rural areas where freezing drizzle is expected to have the greatest impact. This includes Wellington and Dufferin counties under the Upper Grand District School Board, Hanover, Meaford, Owen Sound and the Bruce Peninsula under the Bluewater District School Board, and Perth County under the Avon Maitland District School Board.

These regions rely heavily on rural bus routes, many of which are more difficult to treat quickly during light icing events. While there is a good chance of cancellations here, there is still uncertainty regarding how widespread and persistent the freezing drizzle will be. For that reason, we are capping these areas at a 50 percent chance. It truly could go either way, depending on local road conditions by morning.

A broader swath of Southwestern Ontario extending into portions of Central Ontario carries a slight 25 percent chance of cancellations. This includes the West, Central and South weather zones under the Simcoe County District School Board, Northern Peel Region under the Peel District School Board, Northern Halton Region under the Halton District School Board, Guelph under the Upper Grand District School Board, the Waterloo Region District School Board, the Grand Erie District School Board, and Oxford County under the Thames Valley District School Board.

These regions are also expecting some freezing drizzle overnight, but many of these boards cover more urban routes or have shown a higher threshold for cancellation decisions this season. While slick conditions are possible, it remains uncertain whether they will be widespread enough to justify cancellations.

There is also a separate slight 25 percent chance tied primarily to fog development. This includes Elgin and Middlesex counties under the Thames Valley District School Board, the Lambton Kent District School Board, the Greater Essex County District School Board, Huron County under the Avon Maitland District School Board, and Kincardine and Southampton under the Bluewater District School Board.

Fog-related cancellations are notoriously difficult to forecast, as visibility can vary dramatically over short distances. When fog does become dense enough, however, some rural boards have shown a willingness to cancel buses. Because of that unpredictability, 25 percent is the highest probability we assign to fog-driven events.

Elsewhere across Southern Ontario, the chance of bus cancellations drops to low or very low. We are not expecting the freezing drizzle to be significant enough to prompt cancellations in the urban core of the Greater Toronto Area. However, a low chance remains simply due to localized icy patches.

Similarly, no widespread cancellations are expected across Eastern Ontario or northern sections of Central Ontario, where precipitation has largely ended, and conditions should steadily improve overnight.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

‘Snow (Ice) Day’ Forecast: School Bus Cancellations Almost Certain Across Southern Ontario With Major Winter Storm on Wednesday

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For an updated list of school bus cancellations & school closures, please visit our live article: https://instantweatherinc.com/article/2026/2/18/bus-cancellations

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A major winter storm is set to take aim at a wide swath of Southern Ontario on Wednesday, bringing the threat of significant freezing rain in some regions and heavy snow in others.

The most hazardous conditions are expected to occur right at the height of the morning commute. That timing alone makes school bus cancellations and potentially even school closures highly likely in the hardest hit areas.

The highest confidence for bus cancellations is focused across Southwestern Ontario, particularly west of the Golden Horseshoe, where the most strongly worded alerts are currently in place from Environment Canada.

An orange-level freezing rain warning has been issued for this region, highlighting dangerous travel conditions and the potential for prolonged power outages. Freezing rain of this magnitude almost always leads to widespread cancellations, especially across rural routes where untreated roads can quickly become impassable.

Because of this, we have assigned a 90 percent chance of a snow day to all regions covered by the Bluewater District School Board, most areas within the Avon Maitland District School Board with the exception of southern Huron County, all of the Upper Grand District School Board, and the Waterloo Region District School Board. In these areas, it would be surprising to see buses operate given the expected severity of the icing.

The next tier carries a 75 percent chance of cancellations. This includes southern Huron County under the Avon Maitland District School Board, Oxford County under the Thames Valley District School Board, the Hamilton-Wentworth District School Board, northern Halton under the Halton District School Board, North Peel Region under the Peel District School Board, all regions within the Simcoe County District School Board, Kawartha Lakes under the Trillium Lakelands District School Board, Peterborough and Northumberland counties under the Kawartha Pine Ridge District School Board, and Central Hastings, Belleville and Prince Edward County under Tri-Board Student Transportation Services.

These areas either have a history of not being proactive with cancellations, as is often the case with urban boards in the Golden Horseshoe and Simcoe County, or they sit just outside the most intense freezing rain zone, where conditions could still be severe enough to justify cancellations. However, there remains enough uncertainty regarding whether it will reach the threshold for cancellations to keep them from being put in the 90% zone.

The forecast becomes more complicated across the core of the Greater Toronto Area. In our toss-up category, with a 50 percent chance, we have included the York Region District School Board, North Durham under the Durham District School Board, the Toronto District School Board, southern Peel Region under the Peel District School Board, and southern Halton under the Halton District School Board.

We believe that conditions will likely deteriorate enough to warrant cancellations in at least some of these areas. However, these boards cover more urban routes and have a higher threshold for cancellation decisions. The Toronto District School Board, in particular, tends to cancel only during the most extreme events due to its limited reliance on bused students. This makes proactive decisions less certain, even if conditions are forecasted to be hazardous.

Farther south, we have also assigned a 50 percent chance to the District School Board of Niagara, the Grand Erie District School Board, and London and Middlesex County under the Thames Valley District School Board. In these areas, less freezing rain is expected overall, and temperatures may rise above freezing during the morning. Whether cancellations occur here will depend heavily on actual surface conditions at decision time.

In Central Ontario, the toss-up zone also includes southern Muskoka and Haliburton under the Trillium Lakelands District School Board, as well as North Hastings, and North, Central and South Lennox and Addington under Tri-Board Student Transportation Services. These areas sit on the edge of the heavier snowfall zone associated with the storm. Some are currently under snowfall warnings calling for 10 to 15 cm. However, with totals not expected to be extreme and with TLDSB’s stricter approach to snow days this season, it remains uncertain whether thresholds will be met.

A slight 25 percent chance has been assigned to Chatham-Kent and Lambton County under the Lambton Kent District School Board, Elgin County under the Thames Valley District School Board, North Muskoka under the Trillium Lakelands District School Board, Parry Sound and East Parry Sound under the Near North District School Board, the remaining Tri-Board regions, and the Madawaska region under the Renfrew County District School Board.

We are leaning toward a regular school day in most of these areas. However, surprises are still possible, particularly in parts of Central Ontario if school boards opt for system-wide cancellations rather than region-by-region decisions. With no major winter weather warnings currently in effect for many of these regions, confidence in cancellations remains limited.

We have also included a slight chance for areas covered by the Rainbow District School Board, primarily due to Manitoulin Island being under a snowfall warning. Sudbury itself carries a lower probability and is expected to see a normal school day.

Elsewhere across Southern Ontario, the chance of school bus cancellations drops to low or very low. This includes Deep Southwestern Ontario, where precipitation is expected to fall mainly as rain, and the Ottawa Valley, which is forecast to avoid the worst of this storm altogether.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

‘Snow (Ice/Fog) Day’ Forecast: Freezing Drizzle & Fog May Extend Family Day Weekend for Some Students in Southern Ontario on Tuesday

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For an updated list of school bus cancellations & school closures, please visit our live article: https://instantweatherinc.com/article/2026/2/17/bus-cancellations

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Icy conditions are expected to develop across parts of Central and Eastern Ontario late Monday into Tuesday morning as freezing drizzle moves into the region. At the same time, areas of thick fog are forecast to form across parts of Southwestern Ontario, which could locally reduce visibility to near zero in some communities.

This combination of freezing drizzle and fog has the potential to create hazardous travel conditions for the Tuesday morning commute. As a result, we are likely to see at least some school bus cancellations, with the greatest risk focused on Eastern Ontario, where the most widespread icing is expected.

Although Environment Canada has only issued a freezing drizzle advisory for the Ottawa area at this time, the latest forecast data suggests that the freezing drizzle may be more widespread than currently indicated. If that materializes, much of Central and Eastern Ontario could wake up to icy roads, untreated surfaces and slippery rural routes that linger into the morning.

Our highest confidence for cancellations is centred on the more rural school boards of Eastern Ontario. This includes areas covered by the Upper Canada District School Board, the Renfrew County District School Board, including the Madawaska region, and North Hastings, North Lennox and Addington, and North and Central Frontenac under Tri-Board Student Transportation Services.

These areas rely heavily on rural and secondary roads, which are typically the slowest to improve when freezing drizzle develops overnight. We have assigned these regions a 75 percent chance of school bus cancellations. While cancellations appear likely, there is still some uncertainty regarding how widespread and persistent the icing will be, which keeps these boards just below the highest confidence tier.

In the toss-up category, we have Ottawa, where the urban nature of the school board creates more uncertainty about whether freezing drizzle will meet cancellation thresholds. We have also assigned a 50 percent chance to the remaining Tri-Board regions, excluding Prince Edward County, Pembroke under the Renfrew County District School Board, Peterborough County under the Kawartha Pine Ridge District School Board, and Haliburton under the Trillium Lakelands District School Board.

In these areas, the timing of the precipitation is less certain, and some locations may see freezing drizzle taper off earlier in the night, allowing for potential cleanup before morning. Decisions in these regions will likely come down to local road conditions and how quickly crews can respond overnight.

A slight chance, around 25 percent, extends into regions farther west and south of the core freezing drizzle zone. This includes areas covered by the Near North District School Board, Muskoka and Kawartha Lakes under the Trillium Lakelands District School Board, Northumberland County under the Kawartha Pine Ridge District School Board, and Prince Edward County within Tri-Board Student Transportation Services. We are leaning toward buses running in most of these areas, but localized icy patches cannot be ruled out depending on how much freezing drizzle falls and how quickly temperatures stabilize.

Meanwhile, thick fog is expected to develop across portions of Southwestern Ontario overnight into Tuesday morning. In the past, some rural school boards have chosen to cancel buses or implement delays when fog significantly reduces visibility, particularly on exposed country roads.

However, fog can be highly localized and difficult to forecast precisely. Because of that uncertainty, we have capped the highest probability at 25 percent for areas covered by the Avon Maitland District School Board, as well as Oxford, Elgin and Middlesex counties under the Thames Valley District School Board.

Outside of the freezing drizzle and fog risk zones, the chance of school bus cancellations drops to low or very low. At this time, no cancellations are expected across the urban school boards of the Greater Toronto Area.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow Day’ Forecast for Friday, February 13, 2026

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No impactful winter weather is expected across Southern Ontario throughout the school day on Friday.

As a result, all regions have a less than 5 percent chance of school bus cancellations.

Some heavy snow is expected to move into Central Ontario later on Friday, but it isn’t expected to start until the late afternoon, so it should have no impact on the school day.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow Day’ Forecast for Thursday, February 12, 2026

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Scattered lake effect snow east of Lake Huron has continued to impact portions of Grey, Bruce, Huron and Perth counties throughout the day on Wednesday. While snowfall rates have not been particularly intense, localized blowing snow has created pockets of reduced visibility, especially on exposed rural routes.

This activity is expected to persist overnight and into Thursday morning. However, significant additional accumulation is not anticipated, with most areas seeing only light to moderate snowfall.

Even without heavy new snowfall, the combination of existing snow on the ground and gusty winds could still create locally treacherous travel conditions in parts of the Lake Huron snowbelt. Because of this, there remains a chance that a few school boards may opt to cancel buses on Thursday morning.

The strongest probability is focused on southern Bruce County within the Bluewater District School Board and northern Huron County under the Avon Maitland District School Board. These areas are most exposed to Lake Huron and are more susceptible to blowing and drifting snow. We have assigned these regions a 50 percent chance of school bus cancellations. With no major accumulation expected, the final decision will likely hinge on how intense the blowing snow is during the early morning hours. Current forecasts suggest winds may begin to ease overnight, which keeps this scenario uncertain.

The remainder of the Avon Maitland District School Board, along with central Bruce County and southern Grey County within the Bluewater District School Board, has been assigned a slight 25 percent chance. While some localized blowing snow may occur, confidence is higher that buses will be able to operate normally in these regions, given that they are outside the most intense snowfall bands tonight.

Outside of the Lake Huron shoreline and adjacent snowbelt areas, no impactful winter weather is expected on Thursday. As a result, school bus cancellations are unlikely across the rest of Southern Ontario.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

‘Snow Day’ Forecast: Localized School Bus Cancellations Possible on Wednesday in Parts of Southern Ontario

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While the heavier snow that impacted parts of Eastern Ontario earlier on Tuesday has begun to wind down, lingering impacts may still be felt into Wednesday morning. This will be especially true in rural areas, where secondary roads and backroads may remain snow-covered or poorly cleared by the time buses are scheduled to be on the road.

Behind this departing system, attention turns back to the lakes. Some scattered lake effect snow is expected to redevelop east of Lake Huron overnight and continue into Wednesday morning. Gusty winds, at times reaching 50 to 60 km/h, may combine with this snow to produce areas of blowing and drifting snow. This setup could lead to locally reduced visibility and difficult travel conditions through portions of Grey Bruce and extending into Huron and Perth counties.

Because of this, the strongest chance for school bus cancellations on Wednesday is focused on southern Bruce County within the Bluewater District School Board. This region is most directly exposed to Lake Huron and typically sees stronger wind gusts when lake effect activity is present. Even lighter snowfall amounts can quickly become problematic here due to blowing snow on rural routes.

That said, there is still some uncertainty with this setup. Ice coverage on Lake Huron has increased substantially, which can limit how organized and intense the lake effect snow becomes. We have seen several recent events underperform, likely due to forecast models overestimating the available moisture from a partially frozen lake. Because of this uncertainty, and with no active Environment Canada alerts currently in place, we have capped the probability at 50 percent for southern Bruce County, as it could genuinely go either way.

A slight chance, around 25 percent, has been assigned to the remainder of the Bluewater District School Board, as well as northern sections of Huron and Perth counties, under the Avon Maitland District School Board. In these areas, significant new snowfall is not expected. However, strong winds could still lead to localized blowing and drifting snow, which may be enough to prompt a few cancellations, particularly on exposed rural routes.

We have also extended a 25 percent chance into parts of rural Eastern Ontario. This includes areas covered by the Upper Canada District School Board, North and Central Frontenac, North Lennox and Addington, and North Hastings under Tri-Board Student Transportation Services, as well as the Madawaska region under the Renfrew County District School Board.

While active snowfall should be over by Wednesday morning in these regions, experience has shown that backroads can take longer to fully clear when snow tapers off the evening before. That lingering cleanup concern keeps a few of these boards in play for isolated cancellations.

Outside of these areas, the probability drops off quickly. A widespread low to very low chance has been assigned across adjacent school boards through Central Ontario and into the rest of Eastern Ontario.

While the odd surprise cancellation cannot be completely ruled out based on local road conditions, we are not expecting any widespread issues, and most school boards should see a normal return to classes on Wednesday.

Across Deep Southwestern Ontario, along the Lake Erie shoreline and throughout the Golden Horseshoe, school bus cancellations are not expected. Conditions in these regions should remain manageable, with no significant snowfall or blowing snow anticipated overnight or into the morning.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

‘Snow Day’ Forecast: Up to 10-20cm of Snow on Tuesday Could Bring Widespread Bus Cancellations to Parts of Southern Ontario

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For an updated list of school bus cancellations & school closures, please visit our live article: https://instantweatherinc.com/article/2026/2/10/bus-cancellations

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Widespread snow is expected to spread across much of Central and Eastern Ontario overnight and continue into Tuesday morning. This system will bring a steady period of snowfall that is likely to create hazardous travel conditions through the morning and into the early afternoon, with reduced visibility and snow-covered roads becoming an issue during the busiest travel periods of the day.

While snowfall totals are not expected to be extreme, most areas will see general accumulations in the 10 to 15 cm range, with localized totals approaching 20 cm where snowfall rates remain steadier. The bigger concern with this event is not the total amount of snow, but rather the timing, as the worst conditions are expected to coincide with the morning commute and linger well into the afternoon.

Because of this, there is a meaningful chance that some school boards will opt to cancel buses on Tuesday, particularly in regions where snow is actively falling at the time decisions are made early in the morning.

At this time, Environment Canada has opted to issue a special weather statement rather than a snowfall warning, citing slightly lower totals than what some models are suggesting. This adds an extra layer of uncertainty, as many school boards are less likely to act proactively without a formal warning in place. Should this be upgraded to a snowfall warning by Tuesday morning, confidence in bus cancellations would increase quickly.

Our highest confidence for school bus cancellations is focused on areas where snow is expected to be ongoing during the decision window. This includes Parry Sound and East Parry Sound under the Near North District School Board. With steady snowfall expected through the early morning hours and limited time for cleanup, we have given these regions a 75% chance of bus cancellations on Tuesday.

In the next tier, we have a broad toss-up zone with a 50% chance, where outcomes could genuinely go either way. This includes Muskoka and Haliburton under the Trillium Lakelands District School Board, North Bay within the Near North District School Board, North Hastings, North Lennox and Addington, and North and Central Frontenac under Tri-Board Student Transportation Services, along with the Madawaska region under the Renfrew County District School Board.

Confidence is lower in these areas for a few reasons. In the case of TLDSB, this school board has been particularly strict with bus cancellations this season and may decide that this event does not meet their threshold without a snowfall warning. In Eastern Ontario, snowfall may not begin until later in the morning, meaning boards would need to be proactive based on forecast conditions rather than what is occurring at decision time. Regions that historically tend to act more cautiously have been placed into this 50% category.

A wider group of regions has been assigned a slight chance, around 25%. This includes the Bruce Peninsula under the Bluewater District School Board, the Simcoe North weather zone under the Simcoe County District School Board, North Kawartha Lakes under the Trillium Lakelands District School Board, Peterborough County under the Kawartha Pine Ridge District School Board, the remaining Tri-Board regions, the Upper Canada District School Board, and the remainder of the Renfrew County District School Board. These areas sit just outside the zone of heaviest snowfall during the school day, making it questionable whether conditions will deteriorate enough to prompt cancellations.

For Ottawa, we have gone with a 10 percent chance. While some snow is expected, this system is not currently forecast to be intense enough to meet the higher threshold typically required for cancellations in a large urban school board. We have also extended a very low to low chance into parts of the Golden Horseshoe, particularly rural sections that could see a brief risk of freezing rain during the afternoon. If Environment Canada issues an alert for freezing rain by Tuesday morning, probabilities would increase, but confidence is not high enough at this point to go beyond a low chance.

No school bus cancellations are expected across Deep Southwestern Ontario or the urban school boards of the Greater Toronto Area. Snowfall in these regions will be minimal, and some areas may even climb above the freezing mark during the day on Tuesday, further reducing the likelihood of travel disruptions.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

Southern Ontario: ‘Snow/Cold Day’ Forecast for Monday, February 9, 2026

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While no precipitation is expected across Southern Ontario on Monday, there is still a slight chance of school bus cancellations tied to extreme cold in some parts of the region.

The coldest conditions are expected to be found across portions of Central and Eastern Ontario, where overnight lows combined with wind chills could make it feel near -40°C. Actual air temperatures in these areas may dip into the -25 to -30°C range by Monday morning. This places temperatures very close to the threshold that typically prompts cold-related bus cancellations.

That said, confidence is not particularly high. Some forecast guidance keeps temperatures just warm enough to stay below that cancellation threshold, while other models suggest a slightly colder outcome. With cold events like this, even a difference of a couple of degrees can make a big difference when it comes to school board decisions.

Because of this uncertainty, we have assigned a 25 percent chance of cold-related bus cancellations to Muskoka and Haliburton under the Trillium Lakelands District School Board, Parry Sound and East Parry Sound within the Near North District School Board, North Hastings, North Lennox and Addington, and North and Central Frontenac under Tri-Board Student Transportation Services, as well as the Madawaska region within the Renfrew County District School Board. If any cold day cancellations are announced on Monday, they are most likely to occur within this group of school boards.

Outside of these areas, the probability drops off quickly. We have extended a low to very low chance into parts of rural Southwestern Ontario and around the Golden Horseshoe. While temperatures here are not expected to reach cold-day thresholds, it cannot be completely ruled out if overnight lows end up a few degrees colder than forecast, particularly in more exposed rural areas.

For the remainder of Southern Ontario, school bus cancellations are not expected on Monday. Conditions elsewhere should remain cold but manageable, staying below the level that would typically lead to widespread cold-related disruptions.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.

‘Snow Day’ Forecast: Blast of Heavy Snow on Friday Afternoon May Lead to School Bus Cancellations in Parts of Southern Ontario

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For an updated list of school bus cancellations & school closures, please visit our live article: https://instantweatherinc.com/article/2026/2/6/bus-cancellations

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A messy weather setup is expected across Southern Ontario on Friday, as a burst of heavy snow moves into the region later in the day. Strong winds combined with falling snow are expected to create areas of blowing snow and reduced visibility, particularly through the afternoon and early evening hours. This has prompted Environment Canada to issue a widespread blowing snow advisory across much of Southwestern Ontario.

When it comes to impacts on school transportation, however, the situation is less straightforward. The worst conditions are expected to develop after the school day is already underway, with the most hazardous travel lining up closer to the afternoon commute rather than the morning bus run.

There may be some light snow around during the morning hours, but at this point, it does not appear to be enough on its own to meet the threshold that typically leads to school bus cancellations. Because of this timing, school boards would need to be proactive and factor in rapidly deteriorating conditions later in the day, rather than what is occurring at decision time in the early morning.

Given the blowing snow advisory from Environment Canada and the potential for travel conditions to worsen quickly while buses are on the roads in the afternoon, we have gone with a 50 percent chance for school bus cancellations for regions covered by the Bluewater District School Board, the Avon Maitland District School Board, and Middlesex County under the Thames Valley District School Board. This is very much a borderline scenario and could genuinely go either way. If this system were arriving a few hours earlier, confidence in cancellations would be much higher.

A second tier of regions carries a slight chance, around 25 percent, for a snow day on Friday. This includes areas covered by the Greater Essex County District School Board, the Lambton Kent District School Board, Elgin and Oxford counties under the Thames Valley District School Board, Wellington and Dufferin counties within the Upper Grand District School Board, the Near North District School Board, and the Rainbow District School Board. These areas are more rural in nature and are likely to see snow begin during or just ahead of the afternoon bus run. While most of these regions are expected to operate normally, a few localized decisions to cancel buses cannot be ruled out.

Outside of these zones, probabilities drop off further. We have assigned a widespread low to very low chance across rural school boards around the Golden Horseshoe and extending into parts of Central and Eastern Ontario. In these areas, the bulk of the snow is expected to arrive closer to the dinner hour, which greatly reduces the likelihood of school boards cancelling buses earlier in the day.

That said, if Environment Canada expands blowing snow advisories farther east or begins highlighting particularly poor travel conditions during the afternoon commute, some of the more weather-sensitive school boards could opt to cancel buses as a precaution.

For the more urban school boards, including those across the Greater Toronto Area and the Ottawa region, we are not expecting any school bus cancellations on Friday. Conditions in these areas are not forecast to come anywhere near the threshold that typically prompts cancellations, and travel should remain manageable through the school day.

Disclaimer: Instant Weather has zero authority when it comes to bus and school closures.

It is completely up to the school boards, bus companies, local authorities, and parents to decide what is best for their children. This is our best guess based on our forecast.