Alert archive / California / Frost Advisories in 2023

Frost Advisory 14, NWS San Francisco Bay Area, CA

March 23, 202310 counties in California

NWS San Francisco Bay Area, CA issued this frost advisory at Mar 23, 2023, 2:12 AM PDT for 10 counties in California. It took effect at Mar 24, 2023, 4:00 AM PDT. It was in force for 3 days.

The area

The counties it named.

The facts

Issued
Mar 23, 2023, 2:12 AM PDT (09:12 UTC)
In effect from
Mar 24, 2023, 4:00 AM PDT
Expired
Mar 27, 2023, 9:00 AM PDT
In force
3 days
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, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA, Sonoma County, CA

The radar

The San Francisco radar (KMUX), 42 km from the middle of the area, began a volume at 09:12 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.

What forecasters said that day

The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this frost advisory went out at Mar 22, 10:23 PM PDT, 3 hours 49 minutes earlier.

Area forecast discussion, Mar 22, 10:23 PM PDT, 3 hours 49 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 23, 3:01 AM PDTSmall Craft AdvisoryMTR60 hr
Mar 23, 3:09 PM PDTGale WarningMTR60 hr
Mar 23, 3:09 PM PDTSmall Craft AdvisoryMTR6 hr
Mar 23, 3:09 PM PDTSmall Craft AdvisoryMTR3 days

Nearby

Frost Advisories in California, 2023Every frost advisory in 2023

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.