Winter Weather Advisory

Locations Affected

Mount Baker-Snoqualmie National Forest, WA ∙ Mount Challenger, WA ∙ Sumas Mountain, WA ∙ Ross Lake, WA ∙ Lyman, WA ∙ Baker Lake, WA ∙ Mount Spickard, WA ∙ Van Zandt, WA ∙ Iron Mountain, WA ∙ Marblemount, WA

Full Alert Message

URGENT - WINTER WEATHER MESSAGE National Weather Service Seattle WA 734 PM PST Tue Nov 4 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM WEDNESDAY TO 10 AM PST FRIDAY... * WHAT...Snow is likely. Total snow accumulations between 6 to 12 inches are expected along the Cascade crest and highest points of Highway 20. * WHERE...Cascades of Whatcom and Skagit Counties. * WHEN...From 4 PM Wednesday to 10 AM PST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact travelers along Highway 20 from Wednesday evening through Thursday morning, as well as Thursday night. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Prepare for possible power outages.

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