Don’t let the calendar fool you – a bitter sweet transition to spring is expected. The final two weeks of winter will feature drastic temperature swings and at least one notable storm system this weekend.
An area of low-pressure will form lee of the Rockies in Colorado Friday. Deepening as it tracks northeastwards through the United States towards the Great Lakes Region Saturday evening.
15-25mm of rain across deep Southwestern Ontario & North of Lake Erie. Rain combined with snow-melt may lead to localized flooding.
10-20cm of snow for Northern Ontario. Heaviest snow falling East of Lake Superior & across the Nickel Belt.
Strong to damaging wind gusts for Southwestern & Central Ontario.
A surge of warm air in Southern Ontario precedes wrap around strong winds & snow
SNOW FOR NORTHERN ONTARIO
Like many of the storms this season, this system will feature appreciable snow across Northern Ontario. A large swath of 10-15cm is forecast for Wawa, Timmins and Sudbury areas. Local amounts may approach 20cm.
MESSY WINDSTORM FOR SOUTHERN ONTARIO
First and foremost, this is a messy system for Southern Ontario. Precipitation will move into Windsor in deep Southwestern Ontario around 6pm Saturday. Progressing Northeastwards across Southern Ontario during the evening and overnight. Main concern for along the Lake Erie shoreline will be heavy downpours combined with warmer temperatures, snow melt, and runoff. Minor flooding is possible; stretching into the GTA. Be sure to monitor any statements from your local conservation authority, as we progress through the weekend.
Strong to damaging easterly winds will develop ahead of the storm Saturday evening & overnight. The strongest wind gusts are expected East of Lake Huron. Including Goderich, where peak winds could exceed 100km/h late Saturday evening & overnight. The rest of Southern Ontario will have to contend with strong easterly winds gusting 60-90km/h through the overnight into Sunday morning. Once again, winds will strengthen out of the West Sunday, with the passage of a cold front. Frequent gusts between 50-70km/h is expected.
Considering temperatures will be teetering around the freezing mark, precipitation may begin as snow, freezing rain or ice pellets. Especially, South of Georgian Bay where elevation and heavy precipitation rates will aide in keeping temperatures below freezing for a longer duration. For Eastern Ontario, this system will bring more wet snow than rain. Refer to our forecast map for further details.