Alert archive / California / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in California, 2004
94 severe thunderstorm warnings in 2004. 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2004. Tap one for its archive.
- Severe Thunderstorm Warnings
- 94
- Busiest month
- August28 severe thunderstorm warnings
- Busiest day
- August 15, 20049 severe thunderstorm 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 |
|---|---|---|---|---|
| Feb 2, 10:21 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 69 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 17, 2:15 PM PST | Severe Thunderstorm Warning | MTR | Contra Costa, Marin, Napa, City and County of San Francisco, Sonoma | 30 min |
| Feb 18, 12:48 AM PST | Severe Thunderstorm Warning | LOX | San Luis Obispo | 27 min |
| Feb 25, 12:59 PM PST | Severe Thunderstorm Warning | EKA | Humboldt | 31 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 |
| 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 |
| 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, 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 6, 3:01 PM PDT | Severe Thunderstorm Warning | REV | Mono | 29 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 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 11, 2:25 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 65 min |
| Aug 12, 1:46 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 44 min |
| Aug 12, 2:01 PM PDT | Severe Thunderstorm Warning | PSR | Riverside, San Bernardino | 59 min |
| 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 13, 11:08 AM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 37 min |
| 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, 1:51 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 54 min |
| 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, 5:42 PM PDT | Severe Thunderstorm Warning | HNX | Kern | 63 min |
| Aug 14, 2:58 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 47 min |
| Aug 14, 3:29 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 46 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, 8:10 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 35 min |
| Aug 15, 11:04 AM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 41 min |
| 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, 1:33 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 42 min |
| Aug 15, 1:39 PM PDT | Severe Thunderstorm Warning | REV | Sierra | 46 min |
| Aug 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 |
| Sep 8, 5:13 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 32 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 10, 2:25 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 35 min |
| Sep 10, 2:39 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 36 min |
| Sep 10, 3:34 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 41 min |
| Sep 11, 4:07 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 38 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, 5:22 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 53 min |
| Sep 11, 6:14 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 61 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 |
| Oct 26, 8:15 AM PDT | Severe Thunderstorm Warning | LOX | San Luis Obispo | 60 min |
| Oct 26, 4:27 PM PDT | Severe Thunderstorm Warning | STO | Tehama | 33 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 27, 1:37 PM PDT | Severe Thunderstorm Warning | MTR | Santa Cruz | 23 min |
| Dec 28, 1:09 AM PST | Severe Thunderstorm Warning | LOX | Santa Barbara | 66 min |
| Dec 28, 5:54 AM PST | Severe Thunderstorm Warning | LOX | Los Angeles, Ventura | 66 min |
| Dec 28, 6:06 PM PST | Severe Thunderstorm Warning | SGX | Orange | 24 min |
| Dec 29, 12:15 AM PST | Severe Thunderstorm Warning | SGX | Orange | 60 min |
| Dec 29, 12:22 AM PST | Severe Thunderstorm Warning | SGX | Orange | 53 min |
| Dec 29, 1:45 AM PST | Severe Thunderstorm Warning | SGX | San Diego | 60 min |
| Dec 29, 2:01 AM PST | Severe Thunderstorm Warning | SGX | Riverside, San Bernardino | 59 min |
| Dec 30, 7:00 AM PST | Severe Thunderstorm Warning | MTR | Santa Cruz | 30 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Bernardino County24
- Riverside County8
- San Diego County7
- Tehama County7
- Imperial County5
- Napa County4
- Orange County4
- Glenn County4
- Butte County4
- Lassen County4
- Los Angeles County3
- Lake County3
- Sierra County3
- San Luis Obispo County2
- Yolo County2
- Yuba County2
- Shasta County2
- El Dorado County2
- Colusa County2
- Mono County2
- Plumas County2
- Kern County2
- Santa Cruz County2
- Contra Costa County1
- Marin County1
- City and County of San Francisco1
- Sonoma County1
- Humboldt County1
- Sutter County1
- Alameda County1
- Tulare County1
- Trinity County1
- Siskiyou County1
- Nevada County1
- Sacramento County1
- Solano County1
- San Joaquin County1
- Santa Barbara County1
- Ventura County1
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.