Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >

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Last Map Update: Mon, Dec 29, 2025 at 9:30:13 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.