Alert archive / California / Areal Flood Advisories in 2021
Areal Flood Advisory 39, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this areal flood advisory at Dec 27, 2021, 6:02 AM PST for 6 counties in California. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Dec 27, 2021, 6:02 AM PST (14:02 UTC)
- Expired
- Dec 27, 2021, 9:00 AM PST
- In force
- 3 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
Counties Alameda County, CA, City and County of San Francisco, CA, Contra Costa County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA
The radar
The San Francisco radar (KMUX), 42 km from the middle of the area, began a volume at 14:03 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.
What forecasters said that day
The local office's own words before this areal flood 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 areal flood advisory went out at Dec 26, 2:17 PM PST, 15 hours 45 minutes earlier.
Area forecast discussion, Dec 26, 2:17 PM PST, 15 hours 45 minutes before
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</html>The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 27, 6:35 AM PST | Areal Flood Advisory | MTR | Alameda, Monterey, San Benito, Santa Clara, Santa Cruz | 4 hr |
| Dec 27, 8:54 AM PST | Areal Flood Advisory | MTR | Monterey, San Benito | 3 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.