Tuesday, January 03, 2017

Wide variety of precipitation across southern Quebec

Arctic air will advance across most of Canada, and into the US behind our current storm. Expect very cold but sunny weather into the upcoming weekend. (AccuWeather.com)
Depending where you happen to be in southern Quebec, you will experience several different forms of precipitation over the next 24 to 36 hours. A snowfall warning is in effect north of Laval, into the Laurentians. Expect 15 to 20cm of snow, mixed with sleet or freezing rain at times across central Quebec. In Montreal and Laval, mixed precipitation will start this morning, gradually changing to rain and back to a rain snow mix overnight. A slushy 5cm may accumulate. Needless to say, travel will be impacted today across the region.

Freezing Rain Warning
In the immediate St. Lawrence Valley, including L'Ile Perrot, Vaudreuil and Valleyfield, freezing rain will start this morning and change to rain by evening. Several millimetres of ice are possible. A freezing rain warning has been issued for this region of Quebec, as well as most of northern New York and eastern Ontario. Twin low pressure areas will move north from the southern US towards the Great Lakes, and eventually pass east of Montreal. Colder air will return on the backside of the storm, changing all precipitation to snow late tonight, before ending Wednesday. Several additional centimetres of snow are possible. Gusty west winds will also develop late tonight in Montreal, in excess of 50km/h, and continue into Wednesday. The temperature today and tonight will be close to the freezing point in southern Quebec, before dropping on Wednesday night down to -10C (14F). Clear skies and much colder weather will return to end the week, with lows as cold as -18C (0F).

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