Alert archive / California / Areal Flood Warnings
Areal Flood Warnings in California, 2021
16 areal flood warnings in 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of areal flood warnings reaches back to 2005.
Areal Flood Warnings by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Areal Flood Warnings
- 16
- Busiest month
- October13 areal flood warnings
- Busiest day
- October 24, 202110 areal flood warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 28, 4:59 AM PST | Areal Flood Warning | MTR | Monterey | 9 hr |
| Oct 24, 7:50 AM PDT | Areal Flood Warning | MTR | Sonoma | 3 hr |
| Oct 24, 10:28 AM PDT | Areal Flood Warning | EKA | Lake, Mendocino | 8 hr |
| Oct 24, 10:54 AM PDT | Areal Flood Warning | MTR | Sonoma | 48 hr |
| Oct 24, 11:12 AM PDT | Areal Flood Warning | REV | Lassen, Nevada, Plumas, Sierra | 2 hr |
| Oct 24, 12:14 PM PDT | Areal Flood Warning | MTR | Napa, Sonoma | 14 hr |
| Oct 24, 1:19 PM PDT | Areal Flood Warning | REV | Alpine, El Dorado, Lassen, Nevada, Placer, Plumas and 1 more | 8 hr |
| Oct 24, 3:00 PM PDT | Areal Flood Warning | MTR | Marin | 3 hr |
| Oct 24, 3:23 PM PDT | Areal Flood Warning | MTR | Napa | 3 hr |
| Oct 24, 3:49 PM PDT | Areal Flood Warning | MTR | Sonoma | 11 hr |
| Oct 24, 4:47 PM PDT | Areal Flood Warning | REV | Alpine, El Dorado, Mono | 12 hr |
| Oct 24, 11:40 PM PDT | Areal Flood Warning | HNX | Fresno, Madera, Mariposa, Tuolumne | 14 hr |
| Oct 25, 2:35 AM PDT | Areal Flood Warning | HNX | Fresno, Tulare | 12 hr |
| Oct 25, 5:00 AM PDT | Areal Flood Warning | REV | Alpine, Mono | 4 hr |
| Dec 13, 2:42 PM PST | Areal Flood Warning | MTR | Santa Cruz | 4 hr |
| Dec 15, 8:47 PM PST | Areal Flood Warning | MTR | Sonoma | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.