Monday, January 02, 2017

More freezing rain for southern Quebec and Ontario

An icy mix of rain and snow is expected to start the week in Ontario and Quebec. Arctic air follows the storm by Wednesday. (AccuWeather)
Another winter storm is on the horizon for southern Quebec. A complex weather pattern, with multiple low pressure areas, will yield a wintry mix of precipitation, starting after midnight Monday in Montreal. Today will be partly cloudy and seasonable with temperatures near -5C (23F). Overnight, snow mixed with freezing rain will start from west to east, with temperatures rising towards the freezing point by Tuesday morning. At this time, precipitation is expected to change to rain from Montreal south into New York and New England. Isolated pockets of freezing rain will persist in metro Montreal and northwest into the Ottawa Valley. Freezing rain warnings have already been posted across eastern Ontario. I see no reason why the warnings won't be extended into Montreal and southern Quebec later today. Mainly snow is expected north of Montreal, across the portions of the Laurentians towards Quebec City and points north.

Cold air will filter in behind the storm on Wednesday, changing any precipitation back to snow, before ending. Expect very icy and changeable road conditions from late Monday through Wednesday across the St. Lawrence Valley. Cold air returns for the balance of the week, with clearing skies, and temperatures in the minus teens for lows and around -10C (14F) for highs.

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