Alert archive / California / Flash Flood Warnings
Flash Flood Warnings in California, 2018
149 flash flood warnings in 2018. 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 2018. Tap one for its archive.
- Flash Flood Warnings
- 149
- Busiest month
- July57 flash flood warnings
- Busiest day
- July 12, 201815 flash 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 9, 2:32 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 3 hr |
| Jan 9, 2:56 AM PST | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 4 hr |
| Jan 9, 3:35 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 6 hr |
| Jan 9, 11:50 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 3 hr |
| Jan 9, 2:54 PM PST | Flash Flood Warning | SGX | Orange, Riverside | 3 hr |
| Mar 2, 2:45 AM PST | Flash Flood Warning | LOX | Santa Barbara | 4 hr |
| Mar 13, 2:36 PM PDT | Flash Flood Warning | HNX | Mariposa, Tuolumne | 4 hr |
| Mar 13, 5:58 PM PDT | Flash Flood Warning | HNX | Tulare | 92 min |
| Mar 22, 8:09 AM PDT | Flash Flood Warning | LOX | Ventura | 3 hr |
| Mar 22, 8:22 AM PDT | Flash Flood Warning | MTR | Sonoma | 53 min |
| Mar 22, 9:28 AM PDT | Flash Flood Warning | LOX | Santa Barbara | 3 hr |
| Mar 22, 1:54 PM PDT | Flash Flood Warning | HNX | Mariposa, Tuolumne | 3 hr |
| Mar 22, 2:24 PM PDT | Flash Flood Warning | STO | Tuolumne | 24 hr |
| Mar 22, 3:42 PM PDT | Flash Flood Warning | HNX | Mariposa, Merced, Tuolumne | 3 hr |
| Mar 22, 5:03 PM PDT | Flash Flood Warning | HNX | Tulare | 3 hr |
| Mar 22, 9:21 PM PDT | Flash Flood Warning | LOX | Ventura | 3 hr |
| Apr 7, 8:25 AM PDT | Flash Flood Warning | HNX | Mariposa, Tuolumne | 6 hr |
| May 1, 4:04 PM PDT | Flash Flood Warning | HNX | Mariposa | 68 min |
| May 24, 4:31 PM PDT | Flash Flood Warning | REV | Mono | 119 min |
| Jul 7, 12:29 PM PDT | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| Jul 7, 12:43 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Jul 7, 12:56 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Jul 7, 2:07 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 3 hr |
| Jul 7, 3:06 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 8, 3:25 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 10, 7:48 PM PDT | Flash Flood Warning | VEF | San Bernardino | 98 min |
| Jul 11, 11:29 AM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Jul 11, 12:03 PM PDT | Flash Flood Warning | VEF | San Bernardino | 5 hr |
| Jul 11, 1:05 PM PDT | Flash Flood Warning | PSR | Imperial, Riverside | 4 hr |
| Jul 11, 1:06 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 11, 2:55 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 11, 2:59 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Jul 11, 3:20 PM PDT | Flash Flood Warning | LOX | Los Angeles | 69 min |
| Jul 11, 3:40 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 11, 3:42 PM PDT | Flash Flood Warning | PSR | Riverside | 4 hr |
| Jul 11, 4:11 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 11, 4:49 PM PDT | Flash Flood Warning | PSR | Riverside, San Bernardino | 3 hr |
| Jul 11, 5:06 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Jul 11, 6:33 PM PDT | Flash Flood Warning | SGX | Riverside | 117 min |
| Jul 12, 11:15 AM PDT | Flash Flood Warning | VEF | San Bernardino | 53 min |
| Jul 12, 11:26 AM PDT | Flash Flood Warning | VEF | San Bernardino | 65 min |
| Jul 12, 11:51 AM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 3 hr |
| Jul 12, 12:48 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 12, 12:54 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Jul 12, 1:36 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Jul 12, 1:50 PM PDT | Flash Flood Warning | VEF | San Bernardino | 110 min |
| Jul 12, 2:04 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 12, 3:02 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 12, 3:03 PM PDT | Flash Flood Warning | VEF | San Bernardino | 104 min |
| Jul 12, 4:20 PM PDT | Flash Flood Warning | VEF | San Bernardino | 88 min |
| Jul 12, 4:51 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 12, 4:56 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 12, 5:44 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 13, 11:39 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 13, 2:17 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 13, 2:48 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 13, 3:23 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 14, 3:18 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 19, 4:29 PM PDT | Flash Flood Warning | REV | Alpine, Mono | 94 min |
| Jul 19, 6:39 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 20, 2:18 PM PDT | Flash Flood Warning | REV | Mono | 3 hr |
| Jul 20, 2:35 PM PDT | Flash Flood Warning | SGX | San Bernardino | 85 min |
| Jul 20, 3:35 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 20, 5:19 PM PDT | Flash Flood Warning | HNX | Madera, Tuolumne | 94 min |
| Jul 21, 2:41 PM PDT | Flash Flood Warning | REV | Mono | 5 hr |
| Jul 21, 4:04 PM PDT | Flash Flood Warning | HNX | Fresno, Tulare | 75 min |
| Jul 21, 6:14 PM PDT | Flash Flood Warning | REV | Mono | 2 hr |
| Jul 22, 3:36 PM PDT | Flash Flood Warning | HNX | Madera, Mariposa, Tuolumne | 114 min |
| Jul 22, 3:53 PM PDT | Flash Flood Warning | REV | Mono | 3 hr |
| Jul 23, 3:18 PM PDT | Flash Flood Warning | REV | Alpine | 3 hr |
| Jul 23, 3:58 PM PDT | Flash Flood Warning | REV | Mono | 4 hr |
| Jul 23, 4:01 PM PDT | Flash Flood Warning | REV | Nevada, Placer, Sierra | 3 hr |
| Jul 23, 4:33 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 29, 3:16 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Jul 29, 4:28 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 30, 3:42 PM PDT | Flash Flood Warning | VEF | San Bernardino | 115 min |
| Jul 31, 5:33 PM PDT | Flash Flood Warning | REV | Mono | 3 hr |
| Jul 31, 5:51 PM PDT | Flash Flood Warning | VEF | Inyo | 114 min |
| Jul 31, 6:55 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 1, 1:50 PM PDT | Flash Flood Warning | REV | Mono | 3 hr |
| Aug 1, 2:37 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Aug 2, 3:42 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Aug 9, 2:32 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Aug 9, 3:00 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Aug 9, 11:49 PM PDT | Flash Flood Warning | PSR | Riverside | 3 hr |
| Aug 11, 8:36 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 11, 10:06 PM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 3 hr |
| Aug 11, 11:30 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 11, 11:48 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 15, 2:38 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 3 hr |
| Aug 15, 2:42 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 15, 2:43 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 15, 2:49 PM PDT | Flash Flood Warning | SGX | Riverside | 97 min |
| Aug 16, 12:03 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 16, 1:13 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 16, 11:44 AM PDT | Flash Flood Warning | VEF | San Bernardino | 4 hr |
| Aug 16, 12:45 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
| Aug 16, 12:51 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 16, 12:54 PM PDT | Flash Flood Warning | PSR | Riverside, San Bernardino | 3 hr |
| Aug 16, 1:37 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Aug 16, 2:30 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 77 min |
| Aug 16, 3:04 PM PDT | Flash Flood Warning | PSR | Riverside | 3 hr |
| Aug 16, 3:04 PM PDT | Flash Flood Warning | SGX | San Bernardino | 68 min |
| Aug 16, 5:37 PM PDT | Flash Flood Warning | PSR | Imperial | 3 hr |
| Aug 16, 6:12 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Aug 16, 6:30 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Aug 16, 7:28 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 16, 8:30 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 17, 1:54 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
| Aug 17, 3:13 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 119 min |
| Sep 4, 3:20 PM PDT | Flash Flood Warning | STO | Alpine, Tuolumne | 3 hr |
| Sep 30, 8:09 PM PDT | Flash Flood Warning | PSR | Riverside | 3 hr |
| Sep 30, 11:09 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Oct 1, 5:24 PM PDT | Flash Flood Warning | SGX | Orange, Riverside | 49 min |
| Oct 2, 3:25 PM PDT | Flash Flood Warning | HNX | Tulare | 3 hr |
| Oct 2, 7:14 PM PDT | Flash Flood Warning | VEF | Inyo | 100 min |
| Oct 3, 1:01 PM PDT | Flash Flood Warning | EKA | Mendocino | 3 hr |
| Oct 3, 1:01 PM PDT | Flash Flood Warning | STO | Colusa, Glenn, Lake | 3 hr |
| Oct 3, 1:21 PM PDT | Flash Flood Warning | HNX | Mariposa, Tuolumne | 3 hr |
| Oct 3, 2:45 PM PDT | Flash Flood Warning | HNX | Mariposa | 3 hr |
| Oct 3, 3:46 PM PDT | Flash Flood Warning | HNX | Fresno | 3 hr |
| Oct 3, 4:16 PM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 4 hr |
| Oct 3, 5:46 PM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 119 min |
| Oct 3, 8:55 PM PDT | Flash Flood Warning | VEF | San Bernardino | 5 hr |
| Oct 3, 9:30 PM PDT | Flash Flood Warning | VEF | San Bernardino | 5 hr |
| Oct 3, 9:54 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Oct 3, 10:47 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Oct 4, 12:11 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Oct 13, 12:15 AM PDT | Flash Flood Warning | VEF | San Bernardino | 4 hr |
| Oct 13, 12:17 AM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 3 hr |
| Oct 13, 12:40 AM PDT | Flash Flood Warning | PSR | Riverside, San Bernardino | 3 hr |
| Oct 13, 1:45 AM PDT | Flash Flood Warning | PSR | Imperial | 3 hr |
| Oct 13, 2:48 AM PDT | Flash Flood Warning | PSR | Riverside, San Bernardino | 3 hr |
| Oct 13, 3:22 AM PDT | Flash Flood Warning | SGX | Riverside | 51 min |
| Oct 13, 4:26 AM PDT | Flash Flood Warning | VEF | San Bernardino | 5 hr |
| Oct 13, 6:00 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Oct 13, 6:13 PM PDT | Flash Flood Warning | PSR | Imperial | 4 hr |
| Nov 28, 8:42 AM PST | Flash Flood Warning | HNX | Mariposa, Tuolumne | 8 hr |
| Nov 29, 1:19 AM PST | Flash Flood Warning | HNX | Mariposa, Tuolumne | 8 hr |
| Nov 29, 9:06 AM PST | Flash Flood Warning | SGX | Orange, Riverside | 3 hr |
| Nov 29, 11:51 AM PST | Flash Flood Warning | STO | Butte | 3 hr |
| Nov 29, 2:23 PM PST | Flash Flood Warning | STO | Butte | 7 hr |
| Dec 6, 7:50 AM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 3 hr |
| Dec 6, 11:19 AM PST | Flash Flood Warning | SGX | Orange | 3 hr |
| Dec 6, 1:05 PM PST | Flash Flood Warning | SGX | Orange, Riverside | 3 hr |
| Dec 6, 2:08 PM PST | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Dec 6, 3:58 PM PST | Flash Flood Warning | SGX | Riverside, San Bernardino | 2 hr |
| Dec 6, 5:29 PM PST | Flash Flood Warning | SGX | San Diego | 3 hr |
| Dec 6, 6:00 PM PST | Flash Flood Warning | SGX | San Diego | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Bernardino County62
- Riverside County25
- Inyo County18
- Tuolumne County11
- Mariposa County10
- Mono County9
- San Diego County9
- Santa Barbara County6
- Ventura County6
- Orange County5
- Tulare County4
- Imperial County4
- Los Angeles County3
- Alpine County3
- Madera County2
- Fresno County2
- Butte County2
- San Luis Obispo County1
- Sonoma County1
- Merced County1
- Nevada County1
- Placer County1
- Sierra County1
- Mendocino County1
- Colusa County1
- Glenn County1
- Lake County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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. Rebuilt daily.