The Weather Network – Large storm hits central Canada and could bring damaging winds


Saturday, December 11, 2021, 9:37 a.m. – A Colorado low sweeping through Ontario and Quebec will bring heat, rain, freezing rain, snow and howling, potentially destructive winds on Saturday. Power outages and downed trees will be possible in both provinces.

The start of the weekend will be stormy, hot and potentially damaging in southern Ontario and Quebec as a powerful Colorado low passes through central Canada with a variety of winter precipitation and howling winds, possibly. be destructive on Saturday. As heavy rains push further east and heavy snowfall continues to infiltrate northern sections, the greatest threat will be the winds. In the afternoon and evening, southerly gusts will reach 70 to 90 km / h over most parts of southern Ontario and Quebec, reaching 100 km / h for the eastern shores and open areas of the latter. . Needless to say, there is a high risk of power outages and damage as a result. Motorists should expect complicated journeys, especially in areas experiencing freezing rain, snow and strong gusts of wind. More information on the timeline and impacts, below.

Visit our Complete Winter 2022 Guide for a detailed overview of the winter forecast, tips for preparing for it and much more!


Central Canada is blanketed in a wide array of warnings as a strengthening low spread northeast of Lake Huron on Saturday. Everything from precipitation and freezing rain to winter storm and wind warnings is in effect in Ontario and Quebec.

The warm front of the low moved through the greater Toronto area (GTA) and brought heavy rain overnight. There will be a potential for heavy showers and a thunderous roar in the early afternoon as the cold front moves.

Parts of eastern Ontario receive freezing rain early Saturday morning before an expected transition to rain before noon. There will likely be a period of no rain or light showers between the series of heavy rains in the morning and late afternoon.


Montreal will also see the onset of freezing rain early on Saturday morning, with ice accumulation varying between 5 and 10mm in the hardest hit areas.

Surfaces such as freeways, roads and sidewalks can become icy and slippery, so drivers are encouraged to adapt to changing road conditions.


In terms of precipitation amounts, most of northeastern and southern Ontario are lined up to 5-25mm, with the highest amounts located near the shores of Lakes Erie and Ontario. In Quebec, the largest quantities will pass through the St. Lawrence Valley, where 10 to 20 mm are expected.

In northeastern Ontario, the precipitation will start as snow and then become mixed with freezing rain or rain later Saturday morning or early afternoon. Precipitation will turn to snow in the afternoon before ending in the evening.

The heaviest snow will fall in a narrow strip from the eastern shores of Lake Superior to northern Quebec – with totals of 15-25cm through Sunday.


The greatest threat from the storm will be the dangerous southerly winds. The gusts will increase on Saturday afternoon and peak in the evening. As the cold front passes this will allow for changing and strengthened winds.

Parts of Ontario and Quebec will experience maximum gusts between 70 and 90 km / h, and possibly close to 100 km / h for areas near the eastern shores and open areas. Winds will ease overnight in the south, but Ottawa and southern Quebec will see them linger during this time.

“Damage to buildings, such as roof shingles and windows, can occur. Strong winds can throw objects or break tree branches. Be prepared to adapt your driving to changing road conditions due to high winds, ”Environment and Climate Change Canada (ECCC) said in the wind warning.

Depending on the angle, the wind gusts will be strong enough to generate localized shoreline flooding along Lakes Erie and Ontario.


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