Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

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Last Map Update: Thu, Jan 1, 2026 at 8:42:30 am PST

Watches, Warnings & Advisories

National Weather Service Seattle/Tacoma, WA

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Winter Weather Advisory

Freezing Fog Advisory

Air Stagnation Advisory

Air Stagnation

High pressure this week will have the potential to trap pollutants near the surface over portions of Eastern Washington and North Idaho. This could lead to degradation of air quality in the low lying areas. An Air Stagnation Advisory has been issued for some locations through noon Thursday.