Winter Weather Brings Dangerous Travel Conditions Across the Northern U.S.

Heavy lake effect snow will persist downwind of the Great Lakes through early Saturday. Snow squalls with heavy snow and gusty winds will create dangerous travel in the Interior Northeast due to low visibility and slippery roads. A major winter storm will bring moderate to heavy, accumulating snow and gusty winds from the eastern Plains to the western Great Lakes today through Saturday. Read More >

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Last Map Update: Fri, Nov 28, 2025 at 8:10:28 am PST

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

Dense Fog Advisory

Small Craft Advisory

Frost Advisory

Beach Hazards Statement

Sneaker Wave Threat Saturday

A mid-period westerly swell has the potential to bring a moderate risk of sneaker waves along the Northwest California beaches on Saturday. Sneaker waves are waves that seem to come out of nowhere and can pull you into the frigid ocean. Don't be fooled by an ocean that looks calm. A sneaker wave can strike after 30 minutes of smaller waves. Never turn your back on the ocean!