Weather alerts in California, 2004
350 weather alerts in 2004, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2004. Tap one for its archive.
- Alerts
- 350
- Warnings
- 318
- Watches
- 0
- Advisories
- 0
- Busiest month
- August71 alerts
- Busiest day
- December 29, 200430 alerts
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 1, 1:48 AM PST | Mesoscale Discussion | SPC | Shasta, Siskiyou, Trinity | 2 hr |
| Jan 1, 10:54 AM PST | Flash Flood Warning | MTR | Napa | 3 hr |
| Jan 1, 11:15 AM PST | Flash Flood Warning | MTR | Santa Cruz | 3 hr |
| Feb 2, 1:40 AM PST | Mesoscale Discussion | SPC | Amador, El Dorado, Mariposa, Nevada, Placer, Plumas and 4 more | 5 hr |
| Feb 2, 12:31 PM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Mariposa, Nevada, Placer, Tuolumne | 6 hr |
| Feb 2, 5:40 PM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 4 hr |
| Feb 2, 7:50 PM PST | Flash Flood Warning | LOX | Los Angeles | 16 hr |
| Feb 2, 8:00 PM PST | Flash Flood Warning | SGX | Riverside, San Bernardino | 219 days |
| Feb 2, 9:19 PM PST | Flash Flood Warning | SGX | Orange, Riverside, San Diego | 220 days |
| Feb 2, 10:21 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 69 min |
| Feb 2, 10:25 PM PST | Flash Flood Warning | SGX | Riverside, San Diego | 220 days |
| Feb 2, 10:25 PM PST | Special Marine Warning | SGX | 65 min | |
| Feb 2, 11:28 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 47 min |
| Feb 2, 11:29 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 46 min |
| Feb 2, 11:55 PM PST | Flash Flood Warning | SGX | San Bernardino | 95 min |
| Feb 3, 1:20 AM PST | Flash Flood Warning | SGX | San Bernardino, San Diego | 220 days |
| Feb 17, 2:15 PM PST | Severe Thunderstorm Warning | MTR | Contra Costa, Marin, Napa, City and County of San Francisco, Sonoma | 30 min |
| Feb 17, 2:17 PM PST | Special Marine Warning | MTR | 58 min | |
| Feb 17, 2:17 PM PST | Special Marine Warning | MTR | 58 min | |
| Feb 17, 3:02 PM PST | Mesoscale Discussion | SPC | Alameda, Santa Clara, Santa Cruz | 118 min |
| Feb 18, 12:48 AM PST | Severe Thunderstorm Warning | LOX | San Luis Obispo | 27 min |
| Feb 18, 12:57 PM PST | Mesoscale Discussion | SPC | Kings, Merced, San Benito, Santa Clara, Stanislaus | 2 hr |
| Feb 18, 3:18 PM PST | Flash Flood Warning | SGX | Riverside, San Bernardino, San Diego | 204 days |
| Feb 18, 3:46 PM PST | Flash Flood Warning | SGX | Orange, San Diego | 205 days |
| Feb 18, 4:20 PM PST | Flash Flood Warning | SGX | Riverside, San Diego | 205 days |
| Feb 18, 4:40 PM PST | Flash Flood Warning | SGX | San Bernardino | 206 days |
| Feb 18, 6:25 PM PST | Flash Flood Warning | SGX | San Bernardino, San Diego | 206 days |
| Feb 18, 8:45 PM PST | Flash Flood Warning | SGX | Riverside, San Diego | 206 days |
| Feb 20, 1:07 PM PST | Flash Flood Warning | SGX | San Bernardino | 204 days |
| Feb 22, 12:06 AM PST | Flash Flood Warning | SGX | San Bernardino, San Diego | 203 days |
| Feb 22, 3:00 AM PST | Flash Flood Warning | SGX | San Bernardino | 203 days |
| Feb 22, 6:00 AM PST | Flash Flood Warning | SGX | Riverside, San Bernardino | 203 days |
| Feb 22, 8:00 AM PST | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Feb 22, 11:00 AM PST | Flash Flood Warning | SGX | San Bernardino | 6 hr |
| Feb 22, 11:00 AM PST | Flash Flood Warning | SGX | San Diego | 6 hr |
| Feb 22, 1:49 PM PST | Flash Flood Warning | SGX | Riverside, San Diego | 238 days |
| Feb 22, 5:00 PM PST | Flash Flood Warning | SGX | Riverside, San Bernardino, San Diego | 238 days |
| Feb 22, 8:40 PM PST | Flash Flood Warning | LOX | Los Angeles | 65 min |
| Feb 22, 9:40 PM PST | Flash Flood Warning | SGX | San Bernardino, San Diego | 2 hr |
| Feb 22, 11:55 PM PST | Flash Flood Warning | SGX | San Diego | 2 hr |
| Feb 23, 1:50 AM PST | Flash Flood Warning | SGX | San Diego | 70 min |
| Feb 25, 5:24 AM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Lassen, Nevada, Placer, Plumas and 4 more | 6 hr |
| Feb 25, 7:45 AM PST | Special Marine Warning | MTR | 30 min | |
| Feb 25, 10:41 AM PST | Special Marine Warning | MTR | 34 min | |
| Feb 25, 10:41 AM PST | Special Marine Warning | MTR | 34 min | |
| Feb 25, 12:59 PM PST | Severe Thunderstorm Warning | EKA | Humboldt | 31 min |
| Feb 25, 4:05 PM PST | Flash Flood Warning | LOX | Ventura | 115 min |
| Feb 25, 6:00 PM PST | Flash Flood Warning | LOX | Ventura | 3 hr |
| Feb 25, 9:00 PM PST | Flash Flood Warning | LOX | Ventura | 4 hr |
| Feb 25, 9:30 PM PST | Flash Flood Warning | SGX | San Bernardino | 6 hr |
| Feb 26, 12:30 AM PST | Flash Flood Warning | LOX | Ventura | 4 hr |
| Feb 26, 12:30 AM PST | Flash Flood Warning | SGX | Riverside, San Bernardino | 90 min |
| Feb 26, 1:56 AM PST | Flash Flood Warning | SGX | Riverside, San Bernardino | 34 min |
| Feb 26, 2:30 AM PST | Flash Flood Warning | SGX | Riverside, San Bernardino | 6 hr |
| Feb 26, 5:05 AM PST | Flash Flood Warning | SGX | Orange | 3 hr |
| Feb 26, 7:28 AM PST | Flash Flood Warning | SGX | San Diego | 2 hr |
| Feb 26, 9:30 AM PST | Flash Flood Warning | SGX | San Diego | 90 min |
| Feb 26, 12:37 PM PST | Severe Thunderstorm Warning | STO | Sutter, Yolo, Yuba | 38 min |
| Feb 27, 7:20 PM PST | Severe Thunderstorm Warning | MTR | Alameda | 25 min |
| Mar 1, 9:45 PM PST | Special Marine Warning | LOX | 60 min | |
| Mar 2, 12:36 PM PST | Flash Flood Warning | SGX | San Diego | 84 min |
| Mar 2, 3:03 PM PST | Flash Flood Warning | SGX | San Diego | 117 min |
| Mar 2, 4:50 PM PST | Flash Flood Warning | SGX | San Diego | 2 hr |
| Apr 1, 5:17 PM PST | Severe Thunderstorm Warning | LOX | Los Angeles | 28 min |
| Apr 1, 5:21 PM PST | Severe Thunderstorm Warning | SGX | Orange | 84 min |
| Apr 17, 5:12 PM PDT | Special Marine Warning | LOX | 63 min | |
| Apr 17, 6:12 PM PDT | Special Marine Warning | LOX | 78 min | |
| May 7, 6:35 PM PDT | Severe Thunderstorm Warning | STO | Tehama | 55 min |
| May 7, 7:04 PM PDT | Severe Thunderstorm Warning | STO | Tehama | 26 min |
| May 17, 7:28 PM PDT | Severe Thunderstorm Warning | STO | Shasta, Tehama | 32 min |
| May 19, 4:51 PM PDT | Severe Thunderstorm Warning | STO | Glenn | 54 min |
| May 20, 6:27 PM PDT | Severe Thunderstorm Warning | STO | Yuba | 48 min |
| May 21, 2:58 PM PDT | Severe Thunderstorm Warning | STO | Shasta | 32 min |
| May 21, 6:27 PM PDT | Severe Thunderstorm Warning | STO | El Dorado | 48 min |
| May 21, 7:00 PM PDT | Severe Thunderstorm Warning | STO | Butte, Tehama | 30 min |
| May 21, 7:16 PM PDT | Severe Thunderstorm Warning | STO | Butte, Tehama | 14 min |
| May 28, 3:16 PM PDT | Severe Thunderstorm Warning | STO | Butte, Tehama | 29 min |
| Jun 8, 3:56 PM PDT | Severe Thunderstorm Warning | STO | Lake | 34 min |
| Jun 8, 4:12 PM PDT | Severe Thunderstorm Warning | STO | Colusa, Yolo | 33 min |
| Jun 8, 4:13 PM PDT | Severe Thunderstorm Warning | MTR | Napa | 32 min |
| Jun 8, 4:50 PM PDT | Severe Thunderstorm Warning | MTR | Napa | 30 min |
| Jun 16, 3:16 PM PDT | Severe Thunderstorm Warning | HNX | Tulare | 59 min |
| Jun 28, 2:10 PM PDT | Flash Flood Warning | REV | Plumas | 35 min |
| Jun 28, 4:08 PM PDT | Severe Thunderstorm Warning | STO | Glenn, Lake | 37 min |
| Jun 29, 3:17 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 13 min |
| Jun 30, 3:28 PM PDT | Severe Thunderstorm Warning | STO | El Dorado | 47 min |
| Jul 1, 1:54 PM PDT | Severe Thunderstorm Warning | STO | Colusa, Lake | 21 min |
| Jul 2, 4:04 PM PDT | Flash Flood Warning | LOX | Ventura | 56 min |
| Jul 5, 6:05 PM PDT | Flash Flood Warning | REV | Mono | 115 min |
| Jul 6, 3:01 PM PDT | Severe Thunderstorm Warning | REV | Mono | 29 min |
| Jul 14, 3:45 PM PDT | Flash Flood Warning | SGX | San Diego | 60 min |
| Jul 14, 5:30 PM PDT | Flash Flood Warning | SGX | San Diego | 60 min |
| Jul 23, 6:20 PM PDT | Flash Flood Warning | REV | Lassen | 85 min |
| Jul 23, 6:34 PM PDT | Flash Flood Warning | REV | Plumas | 86 min |
| Jul 24, 3:17 PM PDT | Severe Thunderstorm Warning | REV | Sierra | 43 min |
| Jul 24, 4:31 PM PDT | Severe Thunderstorm Warning | REV | Lassen, Plumas | 44 min |
| Jul 24, 5:06 PM PDT | Flash Flood Warning | REV | Lassen, Plumas | 84 min |
| Jul 24, 6:50 PM PDT | Flash Flood Warning | REV | Lassen | 55 min |
| Jul 24, 7:16 PM PDT | Flash Flood Warning | MFR | Siskiyou | 29 min |
| Jul 25, 6:12 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 33 min |
| Jul 26, 10:59 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 61 min |
| Aug 5, 8:40 AM PDT | Flash Flood Warning | STO | Placer | 4 hr |
| Aug 11, 2:25 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 65 min |
| Aug 11, 2:30 PM PDT | Flash Flood Warning | SGX | San Diego | 45 min |
| Aug 11, 10:00 PM PDT | Flash Flood Warning | VEF | San Bernardino | 29 days |
| Aug 12, 1:46 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 44 min |
| Aug 12, 2:00 PM PDT | Flash Flood Warning | VEF | San Bernardino | 28 days |
| Aug 12, 2:01 PM PDT | Severe Thunderstorm Warning | PSR | Riverside, San Bernardino | 59 min |
| Aug 12, 2:14 PM PDT | Flash Flood Warning | PSR | Riverside, San Bernardino | 38 days |
| Aug 12, 2:33 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 42 min |
| Aug 12, 3:54 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 51 min |
| Aug 12, 4:52 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 53 min |
| Aug 12, 9:53 PM PDT | Flash Flood Warning | VEF | San Bernardino | 29 days |
| Aug 13, 8:32 AM PDT | Flash Flood Warning | SGX | Riverside | 118 min |
| Aug 13, 9:38 AM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 2 hr |
| Aug 13, 10:44 AM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Aug 13, 11:08 AM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 37 min |
| Aug 13, 11:25 AM PDT | Mesoscale Discussion | SPC | Imperial, Riverside, San Bernardino | 3 hr |
| Aug 13, 11:32 AM PDT | Flash Flood Warning | VEF | San Bernardino | 28 days |
| Aug 13, 12:00 PM PDT | Flash Flood Warning | SGX | San Bernardino | 60 min |
| Aug 13, 12:14 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 13, 12:18 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 2 hr |
| Aug 13, 12:42 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 48 min |
| Aug 13, 12:53 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 57 min |
| Aug 13, 12:57 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 48 min |
| Aug 13, 1:36 PM PDT | Flash Flood Warning | VEF | San Bernardino | 28 days |
| Aug 13, 1:51 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 54 min |
| Aug 13, 2:00 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Aug 13, 3:45 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 60 min |
| Aug 13, 4:39 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 81 min |
| Aug 13, 4:43 PM PDT | Flash Flood Warning | HNX | Kern | 3 hr |
| Aug 13, 5:42 PM PDT | Severe Thunderstorm Warning | HNX | Kern | 63 min |
| Aug 14, 2:48 AM PDT | Flash Flood Warning | PSR | Riverside, San Bernardino | 36 days |
| Aug 14, 4:30 AM PDT | Flash Flood Warning | SGX | Riverside | 90 min |
| Aug 14, 11:45 AM PDT | Flash Flood Warning | SGX | San Bernardino | 75 min |
| Aug 14, 12:42 PM PDT | Tornado Warning | SGX | San Bernardino | 33 min |
| Aug 14, 12:45 PM PDT | Flash Flood Warning | SGX | San Diego | 75 min |
| Aug 14, 12:45 PM PDT | Flash Flood Warning | VEF | San Bernardino | 28 days |
| Aug 14, 1:00 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Aug 14, 1:15 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 105 min |
| Aug 14, 1:16 PM PDT | Mesoscale Discussion | SPC | Riverside, San Bernardino | 2 hr |
| Aug 14, 2:58 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 47 min |
| Aug 14, 3:20 PM PDT | Flash Flood Warning | SGX | San Bernardino | 70 min |
| Aug 14, 3:29 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 46 min |
| Aug 14, 3:30 PM PDT | Flash Flood Warning | LOX | Los Angeles | 90 min |
| Aug 14, 3:40 PM PDT | Flash Flood Warning | SGX | San Diego | 80 min |
| Aug 14, 4:22 PM PDT | Severe Thunderstorm Warning | REV | Lassen | 38 min |
| Aug 14, 5:14 PM PDT | Severe Thunderstorm Warning | HNX | Kern | 46 min |
| Aug 14, 5:24 PM PDT | Severe Thunderstorm Warning | REV | Lassen | 36 min |
| Aug 14, 6:11 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 34 min |
| Aug 14, 6:23 PM PDT | Flash Flood Warning | VEF | San Bernardino | 28 days |
| Aug 14, 8:10 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 35 min |
| Aug 15, 3:16 AM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 28 days |
| Aug 15, 11:04 AM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 41 min |
| Aug 15, 11:14 AM PDT | Flash Flood Warning | VEF | San Bernardino | 27 days |
| Aug 15, 12:15 PM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 27 days |
| Aug 15, 12:33 PM PDT | Severe Thunderstorm Warning | REV | Mono | 42 min |
| Aug 15, 1:28 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 47 min |
| Aug 15, 1:30 PM PDT | Flash Flood Warning | PSR | Riverside | 35 days |
| Aug 15, 1:33 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 42 min |
| Aug 15, 1:39 PM PDT | Severe Thunderstorm Warning | REV | Sierra | 46 min |
| Aug 15, 2:38 PM PDT | Mesoscale Discussion | SPC | Inyo, San Bernardino | 2 hr |
| Aug 15, 3:07 PM PDT | Flash Flood Warning | VEF | San Bernardino | 113 min |
| Aug 15, 5:16 PM PDT | Flash Flood Warning | VEF | San Bernardino | 27 days |
| Aug 15, 7:45 PM PDT | Flash Flood Warning | VEF | Inyo | 45 days |
| Aug 16, 6:45 PM PDT | Flash Flood Warning | SGX | San Diego | 45 min |
| Aug 17, 12:56 AM PDT | Flash Flood Warning | VEF | San Bernardino | 94 min |
| Aug 17, 2:30 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 17, 1:17 PM PDT | Mesoscale Discussion | SPC | San Bernardino | 118 min |
| Aug 17, 7:19 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 41 min |
| Aug 19, 3:42 PM PDT | Severe Thunderstorm Warning | REV | Lassen, Nevada, Plumas, Sierra | 33 min |
| Aug 21, 8:53 AM PDT | Tornado Warning | LOX | Los Angeles | 22 min |
| Sep 8, 3:34 PM PDT | Flash Flood Warning | SGX | Riverside | 116 min |
| Sep 8, 5:13 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 32 min |
| Sep 9, 11:37 AM PDT | Flash Flood Warning | VEF | San Bernardino | 113 min |
| Sep 9, 1:25 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 65 min |
| Sep 9, 2:45 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 2 hr |
| Sep 9, 3:08 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Sep 9, 3:23 PM PDT | Flash Flood Warning | SGX | San Bernardino | 82 min |
| Sep 9, 3:23 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 37 min |
| Sep 9, 3:27 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 78 min |
| Sep 9, 4:44 PM PDT | Flash Flood Warning | SGX | San Diego | 91 min |
| Sep 10, 1:55 PM PDT | Flash Flood Warning | SGX | San Diego | 65 min |
| Sep 10, 2:25 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 35 min |
| Sep 10, 2:33 PM PDT | Flash Flood Warning | VEF | San Bernardino | 117 min |
| Sep 10, 2:39 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 36 min |
| Sep 10, 3:12 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Sep 10, 3:34 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 41 min |
| Sep 10, 3:39 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 96 min |
| Sep 10, 5:18 PM PDT | Flash Flood Warning | VEF | San Bernardino | 117 min |
| Sep 10, 7:25 PM PDT | Flash Flood Warning | VEF | San Bernardino | 110 min |
| Sep 11, 12:36 PM PDT | Flash Flood Warning | SGX | San Bernardino | 84 min |
| Sep 11, 1:53 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Sep 11, 2:32 PM PDT | Flash Flood Warning | VEF | San Bernardino | 118 min |
| Sep 11, 3:28 PM PDT | Flash Flood Warning | SGX | Riverside | 92 min |
| Sep 11, 3:52 PM PDT | Flash Flood Warning | SGX | San Bernardino | 83 min |
| Sep 11, 4:07 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 38 min |
| Sep 11, 4:56 PM PDT | Flash Flood Warning | SGX | San Diego | 64 min |
| Sep 11, 5:03 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 42 min |
| Sep 11, 5:08 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 67 min |
| Sep 11, 5:19 PM PDT | Flash Flood Warning | SGX | San Bernardino | 86 min |
| Sep 11, 5:19 PM PDT | Flash Flood Warning | VEF | San Bernardino | 116 min |
| Sep 11, 5:22 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 53 min |
| Sep 11, 5:31 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Sep 11, 6:14 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 61 min |
| Sep 11, 6:27 PM PDT | Flash Flood Warning | SGX | Riverside | 63 min |
| Sep 11, 7:14 PM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 91 min |
| Sep 18, 4:18 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 57 min |
| Sep 18, 11:01 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 59 min |
| Sep 19, 12:05 AM PDT | Severe Thunderstorm Warning | PSR | Imperial, Riverside | 55 min |
| Sep 19, 12:09 AM PDT | Severe Thunderstorm Warning | PSR | Riverside | 66 min |
| Sep 19, 1:55 PM PDT | Severe Thunderstorm Warning | STO | Sacramento | 50 min |
| Sep 19, 3:35 PM PDT | Severe Thunderstorm Warning | STO | Solano | 40 min |
| Sep 19, 5:05 PM PDT | Severe Thunderstorm Warning | STO | San Joaquin | 40 min |
| Sep 30, 7:47 AM PDT | Flash Flood Warning | VEF | Inyo | 28 min |
| Oct 17, 2:55 AM PDT | Flash Flood Warning | SGX | Orange, San Bernardino | 2 hr |
| Oct 17, 7:47 AM PDT | Flash Flood Warning | SGX | San Diego | 118 min |
| Oct 17, 9:38 AM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Oct 17, 1:59 PM PDT | Mesoscale Discussion | SPC | Amador, Butte, Calaveras, Sacramento, San Joaquin, Shasta and 4 more | 3 hr |
| Oct 17, 2:58 PM PDT | Flash Flood Warning | STO | Amador, El Dorado | 3 hr |
| Oct 18, 6:34 AM PDT | Flash Flood Warning | SGX | San Diego | 116 min |
| Oct 18, 8:19 AM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Oct 18, 10:37 AM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Oct 18, 1:35 PM PDT | Flash Flood Warning | SGX | San Diego | 115 min |
| Oct 19, 1:17 AM PDT | Mesoscale Discussion | SPC | Lassen, Plumas, Sierra, Siskiyou | 6 hr |
| Oct 19, 7:45 AM PDT | Flash Flood Warning | STO | Amador, El Dorado | 6 hr |
| Oct 19, 10:30 AM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Oct 19, 1:30 PM PDT | Flash Flood Warning | STO | Amador, El Dorado | 8 hr |
| Oct 19, 2:38 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Oct 19, 3:25 PM PDT | Flash Flood Warning | LOX | Santa Barbara | 3 hr |
| Oct 19, 6:15 PM PDT | Flash Flood Warning | LOX | Santa Barbara | 2 hr |
| Oct 19, 9:45 PM PDT | Flash Flood Warning | LOX | Los Angeles, Ventura | 6 hr |
| Oct 19, 11:50 PM PDT | Flash Flood Warning | SGX | San Bernardino | 6 hr |
| Oct 20, 3:00 AM PDT | Flash Flood Warning | LOX | Los Angeles | 6 hr |
| Oct 20, 4:00 AM PDT | Flash Flood Warning | SGX | Orange | 3 hr |
| Oct 20, 6:15 AM PDT | Flash Flood Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 3 hr |
| Oct 20, 7:18 AM PDT | Mesoscale Discussion | SPC | San Diego | 117 min |
| Oct 20, 9:00 AM PDT | Flash Flood Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 2 hr |
| Oct 20, 10:38 AM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino, San Diego | 2 hr |
| Oct 20, 1:00 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Oct 20, 2:16 PM PDT | Tornado Warning | HNX | Tulare | 29 min |
| Oct 20, 2:18 PM PDT | Tornado Warning | HNX | Tulare | 27 min |
| Oct 20, 3:00 PM PDT | Flash Flood Warning | SGX | San Diego | 4 hr |
| Oct 20, 6:39 PM PDT | Flash Flood Warning | SGX | San Bernardino | 111 min |
| Oct 21, 9:25 AM PDT | Special Marine Warning | SGX | 65 min | |
| Oct 25, 5:01 PM PDT | Special Marine Warning | EKA | 119 min | |
| Oct 26, 8:05 AM PDT | Special Marine Warning | LOX | 55 min | |
| Oct 26, 8:15 AM PDT | Severe Thunderstorm Warning | LOX | San Luis Obispo | 60 min |
| Oct 26, 1:35 PM PDT | Flash Flood Warning | LOX | Santa Barbara | 2 hr |
| Oct 26, 3:50 PM PDT | Special Marine Warning | LOX | 55 min | |
| Oct 26, 3:50 PM PDT | Special Marine Warning | LOX | 55 min | |
| Oct 26, 4:27 PM PDT | Severe Thunderstorm Warning | STO | Tehama | 33 min |
| Oct 26, 5:06 PM PDT | Special Marine Warning | LOX | 54 min | |
| Oct 26, 6:41 PM PDT | Severe Thunderstorm Warning | STO | Glenn | 34 min |
| Oct 26, 7:17 PM PDT | Severe Thunderstorm Warning | STO | Butte, Glenn | 28 min |
| Oct 26, 7:34 PM PDT | Severe Thunderstorm Warning | MTR | Napa | 26 min |
| Oct 26, 11:00 PM PDT | Flash Flood Warning | SGX | Orange, Riverside, San Bernardino | 3 hr |
| Oct 27, 1:52 AM PDT | Flash Flood Warning | SGX | Orange, Riverside, San Bernardino | 3 hr |
| Oct 27, 4:07 AM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Oct 27, 4:50 AM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 3 hr |
| Oct 27, 7:05 AM PDT | Flash Flood Warning | SGX | San Diego | 115 min |
| Oct 27, 10:26 AM PDT | Special Marine Warning | LOX | 64 min | |
| Oct 27, 10:26 AM PDT | Special Marine Warning | LOX | 64 min | |
| Oct 27, 10:36 AM PDT | Special Marine Warning | LOX | 39 min | |
| Oct 27, 10:41 AM PDT | Special Marine Warning | LOX | 49 min | |
| Oct 27, 11:06 AM PDT | Special Marine Warning | LOX | 39 min | |
| Oct 27, 11:24 AM PDT | Special Marine Warning | LOX | 66 min | |
| Oct 27, 11:40 AM PDT | Special Marine Warning | LOX | 65 min | |
| Oct 27, 12:30 PM PDT | Special Marine Warning | LOX | 60 min | |
| Oct 27, 1:32 PM PDT | Special Marine Warning | LOX | 58 min | |
| Oct 27, 1:37 PM PDT | Severe Thunderstorm Warning | MTR | Santa Cruz | 23 min |
| Oct 27, 1:39 PM PDT | Special Marine Warning | LOX | 66 min | |
| Oct 27, 1:39 PM PDT | Special Marine Warning | LOX | 66 min | |
| Oct 27, 2:27 PM PDT | Special Marine Warning | LOX | 78 min | |
| Oct 27, 2:27 PM PDT | Special Marine Warning | LOX | 78 min | |
| Oct 27, 2:54 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Oct 27, 3:37 PM PDT | Special Marine Warning | LOX | 83 min | |
| Oct 27, 4:58 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Oct 28, 1:45 AM PDT | Special Marine Warning | LOX | 90 min | |
| Nov 20, 11:04 PM PST | Flash Flood Warning | SGX | San Bernardino | 4 hr |
| Nov 21, 3:15 AM PST | Mesoscale Discussion | SPC | San Diego | 6 hr |
| Nov 21, 6:16 AM PST | Mesoscale Discussion | SPC | San Diego | 119 min |
| Nov 27, 9:43 AM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Mono, Nevada, Placer, Sierra | 5 hr |
| Dec 6, 3:01 PM PST | Mesoscale Discussion | SPC | Nevada, Plumas, Sierra, Siskiyou, Trinity | 4 hr |
| Dec 6, 8:18 PM PST | Mesoscale Discussion | SPC | Alpine, Amador, Calaveras, El Dorado, Lassen, Mariposa and 8 more | 6 hr |
| Dec 7, 3:55 AM PST | Mesoscale Discussion | SPC | Amador, El Dorado, Tuolumne | 6 hr |
| Dec 7, 10:57 PM PST | Mesoscale Discussion | SPC | Nevada, Placer, Shasta, Sierra | 6 hr |
| Dec 27, 9:57 PM PST | Flash Flood Warning | LOX | Santa Barbara | 93 min |
| Dec 27, 10:41 PM PST | Flash Flood Warning | LOX | Santa Barbara | 3 hr |
| Dec 28, 12:55 AM PST | Special Marine Warning | LOX | 95 min | |
| Dec 28, 12:55 AM PST | Special Marine Warning | LOX | 95 min | |
| Dec 28, 1:09 AM PST | Severe Thunderstorm Warning | LOX | Santa Barbara | 66 min |
| Dec 28, 1:40 AM PST | Flash Flood Warning | LOX | Santa Barbara | 2 hr |
| Dec 28, 4:29 AM PST | Flash Flood Warning | LOX | Ventura | 2 hr |
| Dec 28, 4:48 AM PST | Mesoscale Discussion | SPC | Amador, Calaveras, Madera, Mariposa, Tulare, Tuolumne | 4 hr |
| Dec 28, 5:54 AM PST | Severe Thunderstorm Warning | LOX | Los Angeles, Ventura | 66 min |
| Dec 28, 6:00 AM PST | Flash Flood Warning | LOX | Ventura | 3 hr |
| Dec 28, 10:36 AM PST | Mesoscale Discussion | SPC | Mariposa, Tulare, Tuolumne | 4 hr |
| Dec 28, 10:47 AM PST | Mesoscale Discussion | SPC | San Luis Obispo, Santa Barbara, Ventura | 88 min |
| Dec 28, 11:31 AM PST | Flash Flood Warning | PSR | Imperial, Riverside, San Bernardino | 119 min |
| Dec 28, 12:44 PM PST | Flash Flood Warning | VEF | San Bernardino | 6 hr |
| Dec 28, 1:18 PM PST | Flash Flood Warning | PSR | Imperial, Riverside, San Bernardino | 117 min |
| Dec 28, 3:08 PM PST | Flash Flood Warning | PSR | Imperial, Riverside, San Bernardino | 2 hr |
| Dec 28, 4:48 PM PST | Special Marine Warning | LOX | 57 min | |
| Dec 28, 5:29 PM PST | Special Marine Warning | LOX | 61 min | |
| Dec 28, 5:40 PM PST | Special Marine Warning | LOX | 65 min | |
| Dec 28, 6:06 PM PST | Severe Thunderstorm Warning | SGX | Orange | 24 min |
| Dec 28, 8:20 PM PST | Special Marine Warning | LOX | 3 hr | |
| Dec 28, 8:57 PM PST | Flash Flood Warning | PSR | Riverside, San Bernardino | 4 hr |
| Dec 28, 10:10 PM PST | Tornado Warning | LOX | Los Angeles | 50 min |
| Dec 28, 10:12 PM PST | Tornado Warning | LOX | Los Angeles | 48 min |
| Dec 28, 10:43 PM PST | Tornado Warning | LOX | Los Angeles | 47 min |
| Dec 28, 11:22 PM PST | Special Marine Warning | SGX | 2 hr | |
| Dec 28, 11:23 PM PST | Mesoscale Discussion | SPC | Orange | 2 hr |
| Dec 28, 11:30 PM PST | Special Marine Warning | LOX | 3 hr | |
| Dec 28, 11:30 PM PST | Flash Flood Warning | VEF | San Bernardino | 4 hr |
| Dec 29, 12:10 AM PST | Flash Flood Warning | SGX | San Diego | 4 hr |
| Dec 29, 12:15 AM PST | Severe Thunderstorm Warning | SGX | Orange | 60 min |
| Dec 29, 12:22 AM PST | Special Marine Warning | SGX | 2 hr | |
| Dec 29, 12:22 AM PST | Severe Thunderstorm Warning | SGX | Orange | 53 min |
| Dec 29, 1:20 AM PST | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Dec 29, 1:28 AM PST | Flash Flood Warning | PSR | Riverside, San Bernardino | 3 hr |
| Dec 29, 1:45 AM PST | Severe Thunderstorm Warning | SGX | San Diego | 60 min |
| Dec 29, 1:50 AM PST | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Dec 29, 2:01 AM PST | Severe Thunderstorm Warning | SGX | Riverside, San Bernardino | 59 min |
| Dec 29, 3:20 AM PST | Flash Flood Warning | VEF | San Bernardino | 6 hr |
| Dec 29, 3:40 AM PST | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Dec 29, 3:45 AM PST | Flash Flood Warning | SGX | San Diego | 2 hr |
| Dec 29, 4:35 AM PST | Flash Flood Warning | PSR | Riverside, San Bernardino | 3 hr |
| Dec 29, 4:37 AM PST | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Dec 29, 5:45 AM PST | Flash Flood Warning | SGX | San Diego | 2 hr |
| Dec 29, 7:30 AM PST | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| Dec 29, 7:55 AM PST | Flash Flood Warning | PSR | Riverside | 4 hr |
| Dec 29, 4:42 PM PST | Mesoscale Discussion | SPC | El Dorado, Nevada, Placer, Plumas, Sierra, Siskiyou and 1 more | 5 hr |
| Dec 29, 10:17 PM PST | Mesoscale Discussion | SPC | Nevada, Plumas, Sierra, Siskiyou, Trinity | 4 hr |
| Dec 30, 5:01 AM PST | Mesoscale Discussion | SPC | El Dorado, Nevada, Placer, Plumas, Sierra, Siskiyou and 2 more | 4 hr |
| Dec 30, 6:47 AM PST | Special Marine Warning | MTR | 28 min | |
| Dec 30, 6:47 AM PST | Special Marine Warning | MTR | 28 min | |
| Dec 30, 7:00 AM PST | Severe Thunderstorm Warning | MTR | Santa Cruz | 30 min |
| Dec 30, 7:49 AM PST | Special Marine Warning | MTR | 26 min | |
| Dec 30, 9:04 AM PST | Flash Flood Warning | MTR | Monterey | 116 min |
| Dec 30, 11:03 AM PST | Mesoscale Discussion | SPC | El Dorado, Nevada, Placer, Sierra, Tuolumne | 5 hr |
| Dec 30, 4:47 PM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Plumas, Sierra and 1 more | 4 hr |
| Dec 30, 10:15 PM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Plumas, Sierra, Tuolumne | 4 hr |
| Dec 31, 1:19 AM PST | Flash Flood Warning | LOX | Santa Barbara | 3 hr |
| Dec 31, 4:10 AM PST | Flash Flood Warning | LOX | Santa Barbara | 3 hr |
| Dec 31, 4:20 AM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Tulare, Tuolumne | 4 hr |
| Dec 31, 7:10 AM PST | Flash Flood Warning | LOX | Ventura | 3 hr |
| Dec 31, 10:57 AM PST | Mesoscale Discussion | SPC | Mono | 4 hr |
| Dec 31, 11:58 AM PST | Flash Flood Warning | SGX | San Bernardino | 92 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 94 |
| Tornado Warning | 7 |
| Mesoscale Discussion | 32 |
| Flooding | |
| Flash Flood Warning | 175 |
| Marine | |
| Special Marine Warning | 42 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Bernardino County109
- San Diego County63
- Riverside County49
- El Dorado County17
- Sierra County16
- Los Angeles County16
- Plumas County15
- Nevada County14
- Orange County14
- Tuolumne County12
- Ventura County12
- Placer County11
- Siskiyou County10
- Lassen County10
- Santa Barbara County10
- Trinity County9
- Imperial County9
- Amador County8
- Tehama County8
- Shasta County7
- Alpine County7
- Tulare County6
- Inyo County6
- Napa County5
- Mariposa County5
- Butte County5
- Mono County5
- Santa Cruz County4
- Glenn County4
- San Luis Obispo County3
- Yolo County3
- Yuba County3
- Lake County3
- Kern County3
- Calaveras County3
- Alameda County2
- Santa Clara County2
- Sutter County2
- Colusa County2
- Sacramento County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20032005
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.