An area of low-pressure sliding out of Colorado will undergo explosive intensification through the day Wednesday. This will be an blockbuster blizzard for portions of the Upper Midwest including South Dakota & Minnesota. 40-60cm+ of snow concurrent with 70-90km/h winds will cripple the region.
BLIZZARD WEAKENS AS IT MOVES INTO NORTHWESTERN ONTARIO
The explosive Colorado Low that will cripple South Dakota, will thankfully be weakening as it approaches Ontario. Snow will move into the Thunder Bay, Nipigon, Atikokan, Upsala area before midnight Thursday. Accumulating snow will combine with gusty winds between 40-55km/h, through Thursday night and Friday. It will be a good day to stay home and off the roads if you can.
Wawa to Timmins will see more ice pellets and wet snow, than rain. A transition to rain showers is expected throughout Friday Afternoon.
Kapuskasing to Hearst will remain as snow, where 15-20cm is expected to fall.
SOUTHERN ONTARIO IMPACTS
Strong wind, a surge of warmer air and rainfall will be the story across Southern Ontario Friday. A cool and partly-cloudy day Thursday, with patchy mixed precipitation. Largely confined to Southwestern Ontario.
Strong wind anticipated across Southwestern Ontario Friday morning. Strong Southeasterly gusts between 70-80km/h is expected north of Lake Erie and East of Lake Huron.
Temperatures in the afternoon will spike into the double digits across Southern Ontario. The Nations Capital Region will see the temperature climb near 9c. The trade-off will be a lousy day with occasional rain or showers Thursday. There is even a risk for localized thunderstorms early in the day Friday.