Alert archive / California / Areal Flood Advisories in 2021
Areal Flood Advisory 33, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this areal flood advisory at Dec 25, 2021, 10:10 AM PST for San Mateo County, Santa Clara County, California. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Dec 25, 2021, 10:10 AM PST (18:10 UTC)
- Expired
- Dec 25, 2021, 12:15 PM PST
- In force
- 2 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
Counties San Mateo County, CA, Santa Clara County, CA
The radar
The San Francisco radar (KMUX), 23 km from the middle of the area, began a volume at 18:08 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 25, 8:37 AM PST | Areal Flood Advisory | MTR | City and County of San Francisco, San Mateo | 3 hr |
| Dec 25, 8:41 AM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa | 4 hr |
| Dec 25, 10:41 AM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa, San Mateo, Santa Clara | 2 hr |
| Dec 25, 10:44 AM PST | Areal Flood Advisory | MTR | Alameda, San Mateo, Santa Clara, Santa Cruz | 2 hr |
| Dec 25, 11:30 AM PST | Areal Flood Advisory | MTR | Alameda, Santa Clara, Santa Cruz | 3 hr |
| Dec 25, 12:15 PM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa, Santa Clara | 2 hr |
| Dec 25, 2:34 PM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara, Santa Cruz | 5 hr |
Nearby
Areal Flood Advisories in California, 2021Every areal flood 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.