Alert archive / California / Special Marine Warnings in 2025

Special Marine Warning 21, NWS San Francisco Bay Area, CA

March 17, 2025

NWS San Francisco Bay Area, CA issued this special marine warning at Mar 17, 2025, 11:58 AM PDT. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Mar 17, 2025, 11:58 AM PDT (18:58 UTC)
Expired
Mar 17, 2025, 12:15 PM PDT
In force
17 min
Issued by
NWS San Francisco Bay Area, CA
Area
Storm-based polygon
Hail
0.75 in
Wind
40.0 mph

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 17, 2:21 AM PDTFrost AdvisoryMTRMarin, Monterey, Napa, San Benito, Sonoma31 hr
Mar 17, 2:33 AM PDTSmall Craft AdvisoryMTR30 hr
Mar 17, 9:10 AM PDTSpecial Weather StatementMTRMarin35 min
Mar 17, 9:39 AM PDTSpecial Weather StatementMTRNapa36 min
Mar 17, 9:49 AM PDTSpecial Marine WarningMTR26 min
Mar 17, 10:01 AM PDTSpecial Weather StatementMTRMarin29 min
Mar 17, 10:12 AM PDTSpecial Marine WarningMTR33 min
Mar 17, 10:39 AM PDTSpecial Weather StatementMTRSan Mateo36 min
Mar 17, 10:58 AM PDTSpecial Weather StatementMTRSan Mateo17 min
Mar 17, 11:01 AM PDTSpecial Weather StatementMTRContra Costa29 min
Mar 17, 11:07 AM PDTSpecial Weather StatementMTRSan Mateo23 min
Mar 17, 11:36 AM PDTSpecial Marine WarningMTR24 min
Mar 17, 11:38 AM PDTSpecial Weather StatementMTRSanta Cruz37 min
Mar 17, 12:02 PM PDTSpecial Weather StatementMTRSanta Cruz28 min
Mar 17, 12:22 PM PDTSpecial Weather StatementMTRAlameda23 min
Mar 17, 12:45 PM PDTSpecial Weather StatementMTRSanta Clara30 min
Mar 17, 12:56 PM PDTSpecial Weather StatementMTRSanta Cruz34 min

Nearby

Special Marine Warnings in California, 2025Every special marine warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.