Wild weather weekend for Montreal: from record warmth to snow

Dense fog slowed the Friday morning commute in Montreal. Several accidents were reported, as the visibility fell to under 0.5 kilometres. (Valley Weather Photo)

A large winter storm continues to develop over central Minnesota this morning. This system has produced snow from Colorado northeast into western Ontario. Heavy snow and strong winds are creating difficult travel conditions for a wide area of the northern plains and upper Midwest. In excess of 30cm (1 foot) of snow is forecast for Thunder Bay and the surrounding regions of western Ontario. The storm is forecast to move east into Ontario and Quebec over the weekend. On the east side of the system, in advance of the storm, warm air will surge northward into southern Quebec. High temperatures are forecast to be in the low-to-middle teens today and Saturday in Montreal. Thick fog is expected for both mornings. Once the fog burns off, expect a sunny and warm day, with near record-high temperatures for Montreal.

A sign of the seasons; The Denver metro area had a record high of 27C (80F) on Wednesday. Less than 36 hours later, snow fell, causing hazardous driving conditions and hundreds of accidents. (AccuWeather)

First Snowfall for Montreal
On Saturday night, a strong cold front, associated with the aforementioned winter storm, will slide across eastern Ontario and into the St. Lawrence Valley. A period of steady rain is expected into Sunday, along with rapidly dropping temperatures and increasing northwest winds. By Sunday night, temperatures will approach the freezing point, with rain changing to snow in Montreal and southern Quebec. Snow is forecast, in varying intensities, through Monday morning. At this time, accumulations are very difficult to pinpoint, due to the warm weather in advance of the snow. However, expect a dusting up to as much as 10cm (4 inches) in some locations by Monday. Roads may be snow-covered and slippery, so prepare now for winter driving during the Monday morning commute. I will update this situation later today and over the weekend via The Suburban Twitter feed and Facebook page as well as at valleyweather.blogspot.com