National Weather Service United States Department of Commerce

NWS Sacramento Changes to Public and Fire Weather Zones Coming March 3rd

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Last Map Update: Fri, Jan 23, 2026 at 9:34:29 am PST

Dense Fog Advisory is in effect for the Sacramento Valley, Delta, and northern San Joaquin Valley areas for widespread visibility less than 1/4 mile until 11 am Friday, January 23rd. Expect poor highway visibilities and please slow down and allow extra time to reach your destination.
Areas of morning fog are expected to develop across portions of the Delta, Sacramento Valley, and northern San Joaquin Valley. Keep these tips in mind if you encounter any fog.
Cooler temperatures today through the weekend will be followed by a gradual warming trend into next week.

 

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