Alert archive / California / Dense Fog Advisories in 2021

Dense Fog Advisory 1, NWS San Francisco Bay Area, CA

January 5, 202111 counties in California

NWS San Francisco Bay Area, CA issued this dense fog advisory at Jan 5, 2021, 4:02 AM PST for 11 counties in California. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Jan 5, 2021, 4:02 AM PST (12:02 UTC)
Expired
Jan 5, 2021, 10:39 AM PST
In force
7 hr
Issued by
NWS San Francisco Bay Area, CA

Counties Alameda County, CA, City and County of San Francisco, 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), 46 km from the middle of the area, began a volume at 12:03 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.

Nearby

Dense Fog Advisories in California, 2021Every dense fog advisory in 2021

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.