Prolonged Atmospheric River Continues to Impact the West; Impactful Winter Storm from the Midwest to Northeast

A prolonged atmospheric river event will continue to bring moderate to heavy rain with a risk for flooding to northern and central California with heavy mountain snow in the Sierras, southern Cascades, and northern Rockies through Wednesday. A winter storm is expected to bring snow and ice from the Midwest through the Mid-Atlantic States and New England Wednesday through Thursday. Read More >

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Last Map Update: Tue, Feb 4, 2025 at 12:52:46 pm PST

Watches, Warnings & Advisories

National Weather Service Seattle/Tacoma, WA

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Winter Storm Warning

Winter Weather Advisory

Small Craft Advisory

Lowland Snow

There is increasing confidence for accumulating snow below 500 feet elevation Tuesday night (Feb 4) into Wednesday morning (Feb 5). Here are probabilities for 1 inch or more of snow during this time period. The best accumulations would be over grassy areas and elevated surfaces. ⚠️ This could potentially impact the Wednesday morning commute. Give yourself extra time & take it slow! Refer to ODOT (tripcheck.com) and WSDOT (https://wsdot.com/Travel/Real-time/Map/) for road conditions and restrictions. Stay up to date with the latest forecast at weather.gov/portland