Alert archive / California / Flash Flood Warnings / 2025
Flash Flood Warnings in California, December 2025
51 flash flood warnings in December 2025. 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 flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in December 2025. Tap one for its archive.
- Flash Flood Warnings
- 51
- Busiest day
- December 24, 202530 flash flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Dec 21, 10:51 AM PST | Flash Flood Warning | EKA | Humboldt, Trinity | 62 min |
| Dec 21, 4:43 PM PST | Flash Flood Warning | STO | Shasta | 5 hr |
| Dec 24, 4:02 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 8 hr |
| Dec 24, 5:35 AM PST | Flash Flood Warning | LOX | Los Angeles | 6 hr |
| Dec 24, 5:45 AM PST | Flash Flood Warning | LOX | Ventura | 6 hr |
| Dec 24, 5:51 AM PST | Flash Flood Warning | SGX | San Bernardino | 12 hr |
| Dec 24, 5:56 AM PST | Flash Flood Warning | LOX | Los Angeles | 6 hr |
| Dec 24, 6:09 AM PST | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 6 hr |
| Dec 24, 6:22 AM PST | Flash Flood Warning | HNX | Fresno, Madera | 3 hr |
| Dec 24, 6:35 AM PST | Flash Flood Warning | LOX | Santa Barbara | 5 hr |
| Dec 24, 6:35 AM PST | Flash Flood Warning | LOX | Ventura | 5 hr |
| Dec 24, 6:42 AM PST | Flash Flood Warning | HNX | Fresno, Madera | 4 hr |
| Dec 24, 6:45 AM PST | Flash Flood Warning | SGX | San Bernardino | 12 hr |
| Dec 24, 6:59 AM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 5 hr |
| Dec 24, 7:03 AM PST | Flash Flood Warning | HNX | Kern | 5 hr |
| Dec 24, 7:03 AM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 5 hr |
| Dec 24, 7:04 AM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 5 hr |
| Dec 24, 7:05 AM PST | Flash Flood Warning | HNX | Kern | 5 hr |
| Dec 24, 7:24 AM PST | Flash Flood Warning | HNX | Kern | 10 hr |
| Dec 24, 7:53 AM PST | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Dec 24, 8:05 AM PST | Flash Flood Warning | SGX | San Bernardino | 11 hr |
| Dec 24, 8:36 AM PST | Flash Flood Warning | HNX | Kern | 114 min |
| Dec 24, 8:40 AM PST | Flash Flood Warning | HNX | Kern | 4 hr |
| Dec 24, 9:53 AM PST | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| Dec 24, 10:06 AM PST | Flash Flood Warning | HNX | Kern | 7 hr |
| Dec 24, 10:34 AM PST | Flash Flood Warning | VEF | Inyo | 7 hr |
| Dec 24, 10:53 AM PST | Flash Flood Warning | LOX | Los Angeles | 67 min |
| Dec 24, 11:03 AM PST | Flash Flood Warning | SGX | San Bernardino | 5 hr |
| Dec 24, 11:55 AM PST | Flash Flood Warning | LOX | Los Angeles, Santa Barbara, Ventura | 6 hr |
| Dec 24, 12:01 PM PST | Flash Flood Warning | LOX | Los Angeles | 5 hr |
| Dec 24, 12:06 PM PST | Flash Flood Warning | LOX | Los Angeles | 5 hr |
| Dec 24, 1:34 PM PST | Flash Flood Warning | SGX | San Bernardino | 6 hr |
| Dec 24, 4:35 PM PST | Flash Flood Warning | STO | Sacramento, Yolo | 51 min |
| Dec 24, 5:00 PM PST | Flash Flood Warning | STO | Placer, Sacramento, Sutter | 55 min |
| Dec 24, 6:41 PM PST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Dec 25, 12:59 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 4 hr |
| Dec 25, 2:01 AM PST | Flash Flood Warning | MTR | San Mateo | 3 hr |
| Dec 25, 2:04 AM PST | Flash Flood Warning | LOX | Ventura | 5 hr |
| Dec 25, 2:56 AM PST | Flash Flood Warning | MTR | City and County of San Francisco, San Mateo | 2 hr |
| Dec 25, 3:01 AM PST | Flash Flood Warning | MTR | Alameda, Contra Costa | 3 hr |
| Dec 25, 3:11 AM PST | Flash Flood Warning | MTR | San Mateo, Santa Clara | 3 hr |
| Dec 25, 8:53 AM PST | Flash Flood Warning | LOX | Los Angeles | 82 min |
| Dec 25, 9:29 AM PST | Flash Flood Warning | HNX | Fresno | 9 hr |
| Dec 25, 11:04 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 19 hr |
| Dec 25, 11:48 AM PST | Flash Flood Warning | LOX | Santa Barbara | 13 hr |
| Dec 25, 1:26 PM PST | Flash Flood Warning | HNX | Fresno, Tulare | 3 hr |
| Dec 25, 1:28 PM PST | Flash Flood Warning | LOX | Santa Barbara | 12 hr |
| Dec 25, 3:24 PM PST | Flash Flood Warning | LOX | Ventura | 15 hr |
| Dec 25, 7:28 PM PST | Flash Flood Warning | LOX | Ventura | 11 hr |
| Dec 26, 3:38 AM PST | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Dec 26, 4:21 AM PST | Flash Flood Warning | HNX | Madera, Mariposa | 101 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Ventura County12
- Los Angeles County12
- Santa Barbara County8
- San Bernardino County7
- Kern County6
- Fresno County4
- Madera County3
- San Mateo County3
- Sacramento County2
- Humboldt County1
- Trinity County1
- Shasta County1
- San Luis Obispo County1
- Inyo County1
- Yolo County1
- Placer County1
- Sutter County1
- City and County of San Francisco1
- Alameda County1
- Contra Costa County1
- Santa Clara County1
- Tulare County1
- Mariposa County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.