Alert archive / California / Dense Fog Advisories in 2021

Dense Fog Advisory 17, NWS San Diego, CA

December 4, 2021Riverside County, San Bernardino County, San Diego County, California

NWS San Diego, CA issued this dense fog advisory at Dec 4, 2021, 6:31 PM PST for Riverside County, San Bernardino County, San Diego County, California. It took effect at Dec 4, 2021, 11:00 PM PST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Dec 4, 2021, 6:31 PM PST (02:31 UTC)
In effect from
Dec 4, 2021, 11:00 PM PST
Expired
Dec 5, 2021, 9:00 AM PST
In force
10 hr
Issued by
NWS San Diego, CA

Counties Riverside County, CA, San Bernardino County, CA, San Diego County, CA

The radar

The Santa Ana Mts radar (KSOX), 122 km from the middle of the area, began a volume at 02:35 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.

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.