Alert archive / California / Dense Fog Advisories in 2012

Dense Fog Advisory 3, NWS San Francisco Bay Area, CA

February 12, 2012Marin County, Napa County, Sonoma County, California

NWS San Francisco Bay Area, CA issued this dense fog advisory at Feb 12, 2012, 4:29 AM PST for Marin County, Napa County, Sonoma County, California. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Feb 12, 2012, 4:29 AM PST (12:29 UTC)
Expired
Feb 12, 2012, 11:00 AM PST
In force
7 hr
Issued by
NWS San Francisco Bay Area, CA

Counties Marin County, CA, Napa County, CA, Sonoma County, CA

The radar

The Sacramento radar (KDAX), 88 km from the middle of the area, began a volume at 12:35 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 12, 2:54 AM PSTGale WarningMTR12 hr
Feb 12, 2:54 AM PSTSmall Craft Advisory for Rough BarMTR12 hr
Feb 12, 2:54 AM PSTSmall Craft AdvisoryMTR4 days
Feb 12, 2:28 PM PSTSmall Craft Advisory for Rough BarMTR60 hr

Nearby

Dense Fog Advisories in California, 2012Every dense fog advisory in 2012

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.