Winter Storm Bringing Widespread Hazardous Weather to the Eastern U.S.

A rapidly-intensifying winter storm continues to bring heavy snow, high winds, and blizzard conditions over the Upper Midwest and Great Lakes through today. An Arctic front will lead in a period of gusty to high winds and sharply colder temperatures over the entire eastern U.S. Heavy lake effect snow is then expected from Lakes Erie and Ontario through New Year's Day. Read More >

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Last Map Update: Mon, Dec 29, 2025 at 5:02:39 pm PST

Watches, Warnings & Advisories

National Weather Service Seattle/Tacoma, WA

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Air Stagnation Advisory

Weather outlook

Air Stagnation

Cold temperatures start the week with a slow warming trend forecast over the new few days.

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.