What a freezing cold morning it was across Ontario and Quebec. Temperatures were running over 15 degrees below normal bottoming out at -21C in Kemptville. We actually had a windchill of -29C at midnight. Winds have since eased and the temperature has "warmed" to -15C with a windchill of -19C.
A very difficult forecast lies ahead of us. Low pressure developing over the plains will move towards the Great Lakes and become a potent storm. It will move down the St. Lawrence Valley on Wednesday. Ahead of the system warm air will surge into the region from the south and override the cold air at the surface. Snow and freezing rain is expected to develop on Tuesday and switch to rain late in the day and then back over to snow late Wednesday. It could become very mild south and east of the storm while areas west of the track will remain cold with heavy snow. There is still lots of uncertainty with this system and I will provide an update on the forecast later today. Anybody traveling in Ontario or Quebec the next couple of days should pay attention to the forecast and prepare for changeable winter weather.
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