Northern Ontario: Winter Weather Hazards Outlook for Saturday, March 19, 2022
/Forecast Discussion
Inclement weather isn’t currently expected in the forecasted region on this day.
Inclement weather isn’t currently expected in the forecasted region on this day.
Inclement weather isn’t currently expected in the forecasted region on this day.
Inclement weather isn’t currently expected in the forecasted region on this day.
A potential winter storm could bring accumulating snow and freezing rain to Southern Ontario for Monday into Tuesday. More details on Sunday once we get more confidence.
Strong to damaging wind gusts up to 80-100km/h are possible across Southern Ontario on Sunday. A wind gust forecast will be issued on Saturday.
Inclement weather isn’t currently expected in the forecasted region on this day.
A system is expected to move into Southern Ontario early Tuesday morning bringing a messy mix of precipitation just in time for the Tuesday morning commute. For Southwestern Ontario through the GTA along the Lake Ontario shoreline, it will come down as mostly rain with a slight risk of some freezing drizzle. There could still be some flooding here as we’re expecting 10-20mm of rain throughout the day on Tuesday.
Further to the north and west, there will be some more persistent cold air over K/W, Orangeville, Barrie and Peterborough allowing for more sustained freezing rain. A few hours of freezing rain is possible before switching over to regular rain later in the morning as temperatures climb above the freezing mark.
There is some uncertainty regarding the exact speed of the warm-up through Central and Eastern Ontario. Some models show the below-freezing temperatures holding on for hours through the afternoon and early evening. This would allow for a very sustained period of freezing rain through Muskoka, Bancroft, Algonquin Park and the Ottawa Valley from Tuesday morning lasting throughout the day. The transition would only start to happen around the dinner hour and could last even longer for the Ottawa Valley.
However, other models show a faster switchover and only show significant ice over Algonquin Park and the Ottawa Valley. Those further south would see the switchover during the afternoon, but still, 2-6mm of ice accretion is possible from the freezing rain in the morning. The Ottawa Valley could experience quite the freezing rain event with up to 12mm of ice accretion. This would cause quite an impact on the region, especially with it lasting for 6-12 hours. Be prepared for some power outages and icy road conditions through the affected regions
Most of Southern Ontario should have switched over to rain by late Tuesday morning allowing for some melting. But there is the potential for a flash-freezing Wednesday morning as temperatures plunge below the freezing mark. For Northeastern Ontario, it will come down as sleet with some snow as well as accumulating snow north of Sudbury.
A snowfall accumulation forecast for Northern Ontario will be issued on Monday once we get a better idea of the sleet and snow dividing line. We will also have a more detailed freezing rain risk map after we figure out the speed of the switchover through Central Ontario.
Extreme cold temperatures are possible for Saturday morning however exactly how cold is uncertain at this point. If needed, an extreme cold forecast will be issued on Friday.
Cold temperatures return to Southern Ontario on Wednesday morning. An extreme cold temperature forecast will be issued on Tuesday.
Extremely cold temperatures are expected to start the day on Friday with temperatures between -25°C and -30°C for much of Central and Eastern Ontario. More details on Thursday.
Inclement weather isn’t currently expected in the forecasted region on this day.
Very cold temperatures are possible through Central and Eastern Ontario during the morning on Sunday. Some areas could see temperatures near or below -35°C. A special outlook will be issued on Saturday once we have more data on exactly how cold it will get.
Extremely cold temperatures of -30 or colder are possible through much of Northern Ontario on Saturday morning. More details on Friday.
Very cold temperatures are possible through Central and Eastern Ontario during the morning on Saturday. Some areas could see temperatures near or below -30°C. A special outlook will be issued on Friday once we have more data on exactly how cold it will get.
Extremely cold temperatures of -30 or colder are possible through much of Northern Ontario on Friday morning. More details on Thursday.
There is the potential for extremely cold temperatures through parts of Central and Eastern Ontario on Tuesday morning. More details to come in an outlook on Monday.
Inclement weather isn’t currently expected in the forecasted region on this day.
Inclement weather isn’t currently expected in the forecasted region on this day.
Strong to damaging wind gusts are expected to develop around Lake Superior early Wednesday. There will also be some extremely cold temperatures further north with the temperature near -30°C for some areas. A forecast will be issued on Tuesday.