Prévisions météo en montagne

A pacific frontal system will approach the BC Northwest ranges this morning. The system will move southeastward to the South Coast ranges, North Rockies, Cariboos and North Columbia tonight then reach the South Columbia and Kootenay-Boundary region on Monday. The system will spread light to moderate precipitation of 5 to 15 mm to the coastal ranges today and tonight, respectively, except moderate to heavy precipitation of 15 to 35 mm over the South Coast coastal ranges tonight.  North Rockies, Cariboos and North Columbia will receive moderate precipitation of 5 to 15mm tonight then another 5 to 10 mm on Monday. South Columbia and Kootenay-Boundary area will see light to moderate precipitation of 5 to 10 mm on Monday.

Another pacific frontal system will reach the BC coast Monday afternoon and cross the BC interior Monday night. This system will give heavy precipitation of 30 to 50 mm to the South Coast coastal ranges and moderate precipitation of 10 to 25mm to the interior ranges Monday night.

Freezing levels over the Northwest will gradually drop from about 1500 meters this morning to about 800 meters Monday night then to 500 meters on Wednesday morning. Over the South Coast, freezing levels will stay around 1500 meters today and tonight then rise sharply to about 2500 meters on Monday afternoon when the second system approaches the region. Over North Rockies and Caroboos, freezing levels will remain around 1500 meters through Monday, while over South Columbia and Kootenay-Boundary region, freezing levels will stay around 500-700 meters.

As the fronts move across the province, strong southerly ridge top winds of 60 to 80 km/h will develop over most mountain ranges today and tonight. The winds will continue on Monday and Monday night as a second front passes through the province. 

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An upper low over north Pacific will gradually move eastward to the Gulf of Alaska on Monday.  Ahead of the low, strong upper level westerly or southwesterly flow will continue to bring moist Pacific air to BC and Yukon in the next few days, producing moderate to heavy precipitation to most regions.