Sunday, January 21, 2018

Significant freezing rain expected for southern Quebec

Environment Canada has posted widespread freezing rain warnings across southern and eastern Ontario, as well as southern Quebec. Significant icing is possible is several location. (
Freezing Rain Warning posted for metro Montreal, southern Quebec and eastern Ontario.

Low pressure will move from Colorado northeast towards the lower Great Lakes on Monday. A warm front will approach the St Lawrence Valley by Monday evening. Along and to the north of this front, a wide area of freezing rain is expected, lasting well into the overnight hours. In Montreal, light snow will begin early Monday afternoon, and transition to freezing rain after the supper hour. Expect 2 to 4cm of snow, with up to 10mm of freezing rain possible in Montreal. North of the St. Lawrence River, heavy snow is likely. The precipitation should change to rain on Tuesday, as temperatures rise above freezing from Montreal south. Northeast of Montreal towards Quebec City, heavy snow is forecast, followed by an extended period of freezing rain. Travel will be slow and dangerous late Monday in eastern Ontario, and across southern Quebec into Tuesday.

The system will move east of the region by late Tuesday, with all precipitation changing back to light snow before ending. Winds are forecast to increase as well on Monday, out of the northeast 30-60km/h. The wind will veer to the south early Tuesday, before backing to the west late in the day. The temperature in Montreal will slowly rise on Monday, all the way above freezing by Tuesday morning. The high on Tuesday will be very mild, 5C (41F). Behind the storm, temperatures will drop back down to -8C (18F) by Wednesday morning.

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