Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

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Last Map Update: Thu, Dec 11, 2025 at 3:30:12 am PST

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Dense Fog Advisory

Beach Hazards Statement

Dense Fog Advisory for the Foothill Region.

Dense Fog - Moderate Transportation Risk

Warming Temperatures across the Higher Elevations

A Dense Fog Advisory is in effect through 11 AM Thursday, December 11 for Foothill region of Central California which includes the elevations from 1,000 feet to 2,500 feet. Mountain roads, which include: 41, 58, 152, 168, 198 will see sudden drops in visibilities from several miles to under a quarter mile.

Lingering low clouds across the San Joaquin Valley have kept the area cold with minimal change during the day. On the contrary, the Foothill & higher elevations of the Sierra Nevada, the Coastal Range and the Kern County Mountains will see considerable warming by this weekend. In the image of the range of temperatures, the San Joaquin Valley is more likely to see the lower values. However, the elevations above the clouds will likely see the upper values in the range of temperatures.

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Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

NWS Forecast Office Hanford, CA