Cold air is still on the way for Western Oregon as we head into the weekend. Saturday should be the drier and warmer day this weekend as the next storm’s impacts will be felt Sunday through Tuesday of next week. Snow elevations will drop to around 1,000 feet. The valley floor from Corvallis down to Roseburg will see mostly rain with the occasional snowfall. Locations north of Corvallis, such as Salem and Portland may pick up light accumulations Monday. Totals will remain at half an inch or less.
The Willamette Valley’s temperatures are in decline this weekend. Saturday’s highs will manage to be in the lower 50s with clouds overhead but not much rain. The approaching storm will swing through early Sunday. This is when temperatures drop. Sunday will see plenty of showers in the morning with a few hours of dry weather Sunday evening. Highs will only manage to reach the mid 40s. Starting Monday, temperatures will only be in the mid to upper 30s with clouds overhead and snowfall above 1,000 feet. Rain/snow mix below. Tuesday stays chilly with highs again in the mid to upper 30s.
The Oregon Coast will fight a fair amount of rain with the arrival of the next storm. Saturday’s forecast is fairly dry and under mostly cloudy skies. High temperatures will warm to the lower 50s. The passage of a cold front Saturday night will spawn many showers up and down the coast. Sunday will not be as warm either, with afternoon highs in the mid and upper 40s. Rainfall on Sunday will arrive in waves off the Ocean. Breakers as high as 25 feet are possible on the jetties and in the surf zones. Monday’s temperatures will only be in the mid to lower 40s with more rain throughout the day.
The Umpqua Valley is expected drier weather to begin the weekend. Saturday will remain under mostly cloudy skies. Afternoon temperatures should vary from the mid to low 50s. Sunday morning rain will begin with the arrival of the next storm. Showers on Sunday will fall off and on, but at times heavy localized rain is possible. Highs on Sunday should struggle to hit 50 degrees. By Monday temperatures will only be in the lower 40s. Snowfall is not as big of a threat across Douglas county as the snow elevation should be a little higher—around 1,500 feet.
Travel over the Cascades will be impacted by the approaching storm. Saturday’s travel will see little impacts aside from light rain, and a few flurries on the passes. Sunday and Monday travel will be more adverse. Between 5 to 10 inches of new snow may fall for elevations above 3,000 feet between Sunday morning and Monday afternoon. Carry chains or traction tires with you when traveling through the passes.
Updated Friday evening by meteorologist Travis Knudsen on December 2, 2016.
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