Alert archive / California / Frost Advisories in 2025

Frost Advisory 25, NWS San Francisco Bay Area, CA

February 9, 20258 counties in California

NWS San Francisco Bay Area, CA issued this frost advisory at Feb 9, 2025, 11:49 PM PST for 8 counties in California. It took effect at Feb 11, 2025, 1:00 AM PST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Feb 9, 2025, 11:49 PM PST (07:49 UTC)
In effect from
Feb 11, 2025, 1:00 AM PST
Expired
Feb 11, 2025, 9:00 AM PST
In force
8 hr
Issued by
NWS San Francisco Bay Area, CA

Counties Alameda County, CA, Contra Costa County, CA, Marin County, CA, Monterey County, CA, Napa County, CA, San Benito County, CA, Santa Clara County, CA, Sonoma County, CA

The radar

The San Francisco radar (KMUX), 49 km from the middle of the area, began a volume at 07:51 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 9, 11:49 PM PSTFreeze WarningMTRMonterey, San Benito33 hr

Nearby

Frost Advisories in California, 2025Every frost advisory 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; radar from the NEXRAD Level II archive.