Sunday, February 28th 2021, 8:29 pm - Cooler temperatures will arrive in southern Ontario on Monday along with strong wind gusts and snow
March will kick off with chilly temperatures in Ontario due to winds shifting to the northwest and bringing down a shot of colder air. The winds will be quite blustery and potentially damaging, as 60-80+ km/h gusts are possible for shorelines near Lake Huron and Georgian Bay. Lake-effect snow is expected throughout the region and travel will likely be impacted in areas where the snow and winds create low visibility on the roads. The good news is the temperatures will rebound by mid-next week. Details and timing, below.
- Potentially damaging winds on Monday, coupled with lake-effect snow
- Temperatures take a dip before rebounding by mid-next week
MONDAY: TEMPERATURES DROP, LAKE-EFFECT SNOW, WINDS RAMP UP
March will begin with wintry weather as temperatures dip and snow returns. While many regions saw above seasonal temperatures on Sunday, such as 12°C in Windsor and 4°C in both Ottawa and Toronto, temperatures will feel well below zero degrees across southern Ontario due to the shifting winds.
The cold air aloft, paired with the strong northwesterly winds over the open lake waters will allow for some late season lake-effect snow to develop in the morning on Monday and continue throughout the day.
The snowfall will be a short-lived event, so accumulations will be minimal for most areas. However, 5-10 cm is possible for parts of eastern Ontario and cottage country. Between 2 to 5 cm is anticipated for areas near Lake Huron and Georgian Bay, but localized higher amounts are possible within stronger bands.
Winds will restrengthen in southern Ontario on Monday afternoon. Winds gusting from 60 to 80 km/h will be possible and could be damaging, particularly for areas near Lake Huron and Georgian Bay. Some parts of this region have the potential to see wind gusts over 80 km/h before they diminish overnight.
“Power outages are possible. Damage to buildings, such as to roof shingles and windows, may occur. High winds may toss loose objects or cause tree branches to break,” warns Environment Canada. Blowing snow will be likely, so travellers in these regions should expect difficult travel as visibilities will be reduced.
The snow and winds will ease Monday overnight, with temperatures expected to slowly rebound by mid-week.
TUESDAY AND BEYOND: UP-AND-DOWN TEMPERATURES, UNSETTLED CONDITIONS
Colder than seasonal temperatures are expected for Tuesday, especially for eastern Ontario.
By mid-week, temperatures turn milder once again with fair skies, but late-week holds some potential for the return of unsettled conditions, as well as another drop in daytime highs for the first weekend of March.
Be sure to check back for the latest weather updates across Ontario.
Thumbnail credit: Leslie Karniszewski, Elliot Lake, Ontario