Mountain Weather Forecast

A arctic ridge over the northern BC Interior this morning will continue to build southwards today bringing cold to dry air to all interior regions by early Tuesday morning. Today's maximum temperatures over most interior locations will be about 5 to 10C colder than normal while central and northern locations will see daytime highs close to 15C below normal on Tuesday. The arctic ridge, combined with a surface trough along the outer BC coast, is generating moderate to strong outflow winds through mainland inlets giving dry and clear conditions to most coastal locations.

On Tuesday, a low pressure centre to the west of Haida Gwaii will move southeastward along the BC coast and deepen rapidly. The low will lie off northwest Vancouver Island by Tuesday afternoon with moisture ahead of the low giving snow to the south coast. The BC interior should remain dry until the late Tuesday afternoon when increasing clouds will bring snow to the southwestern regions.

A ridge of high pressure over Yukon from today into Tuesday is bringing cold and dry conditions to the territory. The main exception will be the southeast Yukon, near Watson Lake, which will see mainly cloudy skies and scattered flurries persisting until Tuesday morning.

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The 500 mb animation depicted above shows an upper trough over Alberta extending into the BC interior this morning resulting in a strong northwesterly flow off the BC coast. An upper low centre will form off the northern Alaskan Panhandle on Tuesday morning with an upper trough extending southwestward from the low. This upper trough will slowly move southwards along the BC coast to lie through western Washington State by Thursday afternoon. A second upper low centre will form near Kodiak Island on Thursday morning and move southeastward and weaken off northwest Vancouver Island on Saturday morning.