Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Last Update: 843 AM PST Wed Jan 21 2026

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12NM N San Francisco CA

Marine Zone Forecast


Today
NE wind around 5 kt. Widespread dense fog early this morning. Areas of dense fog late this morning.
Tonight
SW wind around 5 kt, veering to NW after midnight. Areas of dense fog in the evening. Widespread dense fog after midnight.
Thu
SW wind around 5 kt. Patchy dense fog in the morning.
Thu Night
SW wind around 5 kt.
Fri
NE wind around 5 kt.
Fri Night
NW wind around 5 kt, veering to N after midnight.
Sat
NE wind 5 to 10 kt.
Sat Night
NE wind around 5 kt.
Sun
NE wind around 5 kt.
Sun Night
NE wind around 5 kt.



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843 AM PST Wed Jan 21 2026
 
 

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