Weather alerts in California, 1998
342 weather alerts in 1998, 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 1998. Tap one for its archive.
- Alerts
- 342
- Warnings
- 339
- Watches
- 3
- Advisories
- 0
- Busiest month
- February139 alerts
- Busiest day
- February 3, 199835 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 9, 2:25 PM PST | Tornado Warning | LOX | Los Angeles | 60 min |
| Jan 12, 11:47 AM PST | Flash Flood Warning | STO | Shasta, Tehama | 73 min |
| Jan 12, 1:25 PM PST | Flash Flood Warning | STO | Placer, Sacramento, Yuba | 65 min |
| Jan 12, 1:25 PM PST | Flash Flood Warning | STO | San Joaquin | 65 min |
| Jan 12, 2:16 PM PST | Flash Flood Warning | STO | Calaveras, Stanislaus | 74 min |
| Jan 12, 2:16 PM PST | Flash Flood Warning | STO | Nevada, Sierra | 74 min |
| Jan 12, 2:16 PM PST | Flash Flood Warning | STO | Amador, El Dorado, Placer | 74 min |
| Jan 29, 6:40 AM PST | Flash Flood Warning | STO | Shasta | 2 hr |
| Jan 29, 12:44 PM PST | Severe Thunderstorm Warning | HNX | Fresno, Kings | 46 min |
| Jan 29, 2:12 PM PST | Severe Thunderstorm Warning | STO | Sacramento | 33 min |
| Feb 2, 5:35 AM PST | Flash Flood Warning | HNX | Kern | 115 min |
| Feb 2, 7:45 AM PST | Flash Flood Warning | HNX | Kern | 4 hr |
| Feb 2, 12:45 PM PST | Flash Flood Warning | MTR | Santa Clara, Santa Cruz | 11 hr |
| Feb 2, 12:45 PM PST | Flash Flood Warning | MTR | Monterey | 11 hr |
| Feb 2, 2:30 PM PST | Flash Flood Warning | MTR | Alameda, San Mateo, Santa Clara, Santa Cruz | 10 hr |
| Feb 2, 2:30 PM PST | Flash Flood Warning | MTR | Marin | 10 hr |
| Feb 2, 2:30 PM PST | Flash Flood Warning | MTR | Monterey | 10 hr |
| Feb 2, 2:30 PM PST | Flash Flood Warning | MTR | Contra Costa | 10 hr |
| Feb 2, 2:30 PM PST | Flash Flood Warning | MTR | City and County of San Francisco | 10 hr |
| Feb 2, 4:00 PM PST | Flash Flood Warning | MTR | Alameda, Contra Costa | 8 hr |
| Feb 2, 4:00 PM PST | Flash Flood Warning | MTR | City and County of San Francisco, San Mateo | 8 hr |
| Feb 2, 4:00 PM PST | Flash Flood Warning | MTR | Marin, Sonoma | 8 hr |
| Feb 2, 4:00 PM PST | Flash Flood Warning | MTR | Monterey, San Benito, Santa Cruz | 8 hr |
| Feb 2, 4:00 PM PST | Flash Flood Warning | MTR | Santa Clara | 8 hr |
| Feb 2, 4:00 PM PST | Flash Flood Warning | MTR | Napa | 8 hr |
| Feb 2, 5:57 PM PST | Flash Flood Warning | STO | Glenn, Tehama | 3 hr |
| Feb 2, 11:30 PM PST | Flash Flood Warning | MTR | Riverside | 13 hr |
| Feb 2, 11:30 PM PST | Flash Flood Warning | MTR | Amador, Calaveras | 13 hr |
| Feb 2, 11:30 PM PST | Flash Flood Warning | MTR | City and County of San Francisco | 13 hr |
| Feb 2, 11:30 PM PST | Flash Flood Warning | MTR | Butte | 13 hr |
| Feb 3, 2:30 AM PST | Flash Flood Warning | STO | Tehama | 3 hr |
| Feb 3, 2:55 AM PST | Severe Thunderstorm Warning | LOX | San Luis Obispo, Santa Barbara | 110 min |
| Feb 3, 3:30 AM PST | Severe Thunderstorm Watch | SPC | Los Angeles, Orange, Ventura | 5 hr |
| Feb 3, 4:11 AM PST | Flash Flood Warning | LOX | Los Angeles | 4 hr |
| Feb 3, 4:48 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 4 hr |
| Feb 3, 5:12 AM PST | Flash Flood Warning | HNX | Fresno | 2 hr |
| Feb 3, 5:30 AM PST | Severe Thunderstorm Warning | LOX | Ventura | 60 min |
| Feb 3, 6:39 AM PST | Severe Thunderstorm Warning | LOX | Los Angeles | 66 min |
| Feb 3, 7:50 AM PST | Severe Thunderstorm Warning | LOX | Los Angeles | 55 min |
| Feb 3, 8:00 AM PST | Severe Thunderstorm Watch | SPC | Orange, San Diego | 6 hr |
| Feb 3, 9:05 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 3 hr |
| Feb 3, 9:05 AM PST | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Feb 3, 10:05 AM PST | Severe Thunderstorm Warning | LOX | Ventura | 55 min |
| Feb 3, 10:20 AM PST | Flash Flood Warning | MTR | Monterey, San Benito, San Mateo, Santa Clara, Santa Cruz | 6 hr |
| Feb 3, 10:20 AM PST | Flash Flood Warning | MTR | Marin, Sonoma | 6 hr |
| Feb 3, 10:20 AM PST | Flash Flood Warning | MTR | City and County of San Francisco | 6 hr |
| Feb 3, 10:20 AM PST | Flash Flood Warning | MTR | Napa | 6 hr |
| Feb 3, 10:20 AM PST | Flash Flood Warning | MTR | Alameda, Contra Costa | 6 hr |
| Feb 3, 10:30 AM PST | Flash Flood Warning | HNX | Kern | 2 hr |
| Feb 3, 11:50 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 3 hr |
| Feb 3, 11:50 AM PST | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Feb 3, 12:09 PM PST | Flash Flood Warning | STO | Amador, El Dorado | 51 min |
| Feb 3, 12:41 PM PST | Flash Flood Warning | STO | Calaveras | 2 hr |
| Feb 3, 3:21 PM PST | Flash Flood Warning | SGX | San Diego | 2 hr |
| Feb 5, 4:00 PM PST | Flash Flood Warning | MTR | Napa, Sonoma | 8 hr |
| Feb 5, 4:00 PM PST | Flash Flood Warning | MTR | Marin | 8 hr |
| Feb 5, 6:20 PM PST | Flash Flood Warning | STO | Solano | 12 hr |
| Feb 6, 7:57 AM PST | Flash Flood Warning | LOX | Santa Barbara | 63 min |
| Feb 6, 7:57 AM PST | Severe Thunderstorm Warning | LOX | Santa Barbara | 63 min |
| Feb 6, 8:35 AM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 70 min |
| Feb 6, 8:35 AM PST | Severe Thunderstorm Warning | LOX | Los Angeles, Ventura | 70 min |
| Feb 6, 8:42 AM PST | Flash Flood Warning | MTR | Monterey | 6 hr |
| Feb 6, 8:55 AM PST | Flash Flood Warning | LOX | Santa Barbara | 65 min |
| Feb 6, 9:10 AM PST | Flash Flood Warning | LOX | Ventura | 95 min |
| Feb 6, 9:10 AM PST | Severe Thunderstorm Warning | LOX | Ventura | 95 min |
| Feb 6, 9:15 AM PST | Severe Thunderstorm Warning | LOX | San Luis Obispo, Santa Barbara | 60 min |
| Feb 6, 9:25 AM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 65 min |
| Feb 6, 9:25 AM PST | Severe Thunderstorm Warning | LOX | Los Angeles, Ventura | 65 min |
| Feb 6, 9:38 AM PST | Flash Flood Warning | MTR | San Mateo, Santa Clara | 5 hr |
| Feb 6, 9:55 AM PST | Flash Flood Warning | LOX | Los Angeles | 110 min |
| Feb 6, 10:30 AM PST | Flash Flood Warning | LOX | Los Angeles, Santa Barbara, Ventura | 90 min |
| Feb 6, 11:45 AM PST | Flash Flood Warning | MTR | Marin, Sonoma | 3 hr |
| Feb 6, 11:45 AM PST | Severe Thunderstorm Watch | SPC | Alameda, Contra Costa, Marin, Monterey, San Benito, San Joaquin and 5 more | 4 hr |
| Feb 6, 12:00 PM PST | Flash Flood Warning | LOX | Santa Barbara | 60 min |
| Feb 6, 1:28 PM PST | Flash Flood Warning | SGX | Orange | 62 min |
| Feb 6, 2:02 PM PST | Severe Thunderstorm Warning | MTR | Santa Clara, Santa Cruz | 58 min |
| Feb 6, 2:44 PM PST | Flash Flood Warning | MTR | Sonoma | 3 hr |
| Feb 6, 2:44 PM PST | Flash Flood Warning | MTR | San Mateo | 3 hr |
| Feb 6, 4:37 PM PST | Flash Flood Warning | STO | Calaveras, Stanislaus | 113 min |
| Feb 6, 4:37 PM PST | Severe Thunderstorm Warning | STO | Calaveras, Stanislaus | 113 min |
| Feb 6, 9:15 PM PST | Flash Flood Warning | MTR | San Mateo | 3 hr |
| Feb 6, 9:15 PM PST | Flash Flood Warning | MTR | Sonoma | 3 hr |
| Feb 7, 8:30 AM PST | Flash Flood Warning | MTR | Amador | 6 hr |
| Feb 7, 8:30 AM PST | Flash Flood Warning | MTR | Riverside | 6 hr |
| Feb 7, 12:05 PM PST | Flash Flood Warning | MTR | Alameda, San Mateo, Santa Clara, Santa Cruz | 8 hr |
| Feb 7, 12:05 PM PST | Flash Flood Warning | MTR | Contra Costa | 8 hr |
| Feb 7, 12:05 PM PST | Flash Flood Warning | MTR | City and County of San Francisco | 8 hr |
| Feb 7, 12:24 PM PST | Flash Flood Warning | MTR | Monterey, San Benito | 8 hr |
| Feb 7, 1:25 PM PST | Flash Flood Warning | MTR | Napa, Sonoma | 7 hr |
| Feb 7, 1:25 PM PST | Flash Flood Warning | MTR | Marin | 7 hr |
| Feb 7, 3:45 PM PST | Flash Flood Warning | LOX | Santa Barbara | 2 hr |
| Feb 7, 5:05 PM PST | Flash Flood Warning | LOX | Ventura | 6 hr |
| Feb 7, 5:45 PM PST | Flash Flood Warning | LOX | Santa Barbara | 3 hr |
| Feb 7, 5:53 PM PST | Severe Thunderstorm Warning | MTR | Santa Clara, Santa Cruz | 37 min |
| Feb 7, 7:50 PM PST | Flash Flood Warning | LOX | Los Angeles | 4 hr |
| Feb 7, 8:00 PM PST | Flash Flood Warning | MTR | Napa, Sonoma | 3 hr |
| Feb 7, 8:00 PM PST | Flash Flood Warning | MTR | City and County of San Francisco, San Mateo | 3 hr |
| Feb 7, 8:00 PM PST | Flash Flood Warning | MTR | Monterey, San Benito, Santa Cruz | 3 hr |
| Feb 7, 8:00 PM PST | Flash Flood Warning | MTR | Alameda, Santa Clara | 3 hr |
| Feb 7, 8:00 PM PST | Flash Flood Warning | MTR | Contra Costa | 3 hr |
| Feb 7, 8:00 PM PST | Flash Flood Warning | MTR | Marin | 3 hr |
| Feb 7, 11:00 PM PST | Flash Flood Warning | MTR | Alameda, San Benito, San Mateo, Santa Clara, Santa Cruz | 3 hr |
| Feb 7, 11:00 PM PST | Flash Flood Warning | MTR | Napa, Sonoma | 3 hr |
| Feb 7, 11:00 PM PST | Flash Flood Warning | MTR | City and County of San Francisco | 3 hr |
| Feb 7, 11:00 PM PST | Flash Flood Warning | MTR | Marin | 3 hr |
| Feb 7, 11:00 PM PST | Flash Flood Warning | MTR | Monterey | 3 hr |
| Feb 7, 11:00 PM PST | Flash Flood Warning | MTR | Contra Costa | 3 hr |
| Feb 7, 11:45 PM PST | Flash Flood Warning | SGX | Orange | 75 min |
| Feb 8, 3:30 AM PST | Flash Flood Warning | SGX | San Diego | 90 min |
| Feb 8, 6:55 AM PST | Flash Flood Warning | MTR | Santa Clara | 8 hr |
| Feb 8, 1:55 PM PST | Flash Flood Warning | MTR | Santa Clara | 4 hr |
| Feb 8, 5:55 PM PST | Flash Flood Warning | MTR | Santa Clara | 5 hr |
| Feb 8, 7:00 PM PST | Flash Flood Warning | SGX | San Diego | 60 min |
| Feb 8, 7:00 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 60 min |
| Feb 8, 8:10 PM PST | Flash Flood Warning | SGX | San Diego | 60 min |
| Feb 8, 8:10 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 60 min |
| Feb 14, 4:37 PM PST | Severe Thunderstorm Warning | STO | Shasta, Tehama | 48 min |
| Feb 14, 5:38 PM PST | Severe Thunderstorm Warning | HNX | Tulare | 37 min |
| Feb 14, 6:17 PM PST | Flash Flood Warning | SGX | San Diego | 58 min |
| Feb 14, 7:15 PM PST | Flash Flood Warning | SGX | San Diego | 60 min |
| Feb 16, 10:40 PM PST | Flash Flood Warning | SGX | San Diego | 50 min |
| Feb 16, 10:40 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 50 min |
| Feb 19, 8:15 AM PST | Flash Flood Warning | MTR | Amador | 6 hr |
| Feb 19, 8:15 AM PST | Flash Flood Warning | MTR | Sonoma | 6 hr |
| Feb 19, 2:15 PM PST | Flash Flood Warning | MTR | Amador | 6 hr |
| Feb 19, 2:55 PM PST | Severe Thunderstorm Warning | LOX | San Luis Obispo, Santa Barbara | 50 min |
| Feb 19, 3:45 PM PST | Severe Thunderstorm Warning | LOX | San Luis Obispo, Santa Barbara | 45 min |
| Feb 21, 9:45 AM PST | Flash Flood Warning | MTR | Amador | 2 hr |
| Feb 21, 9:45 AM PST | Flash Flood Warning | MTR | Riverside | 2 hr |
| Feb 21, 12:00 PM PST | Flash Flood Warning | MTR | Riverside | 3 hr |
| Feb 21, 12:00 PM PST | Flash Flood Warning | MTR | Amador | 3 hr |
| Feb 21, 2:30 PM PST | Flash Flood Warning | MTR | San Mateo, Santa Cruz | 5 hr |
| Feb 23, 9:35 AM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 8 hr |
| Feb 23, 12:40 PM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 5 hr |
| Feb 23, 3:13 PM PST | Flash Flood Warning | HNX | Kern | 3 hr |
| Feb 23, 4:00 PM PST | Flash Flood Warning | LOX | Los Angeles | 4 hr |
| Feb 23, 5:55 PM PST | Flash Flood Warning | SGX | San Bernardino | 7 hr |
| Feb 23, 6:00 PM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 3 hr |
| Feb 23, 6:30 PM PST | Flash Flood Warning | SGX | Orange | 7 hr |
| Feb 23, 8:50 PM PST | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| Feb 23, 10:00 PM PST | Flash Flood Warning | SGX | San Diego | 5 hr |
| Feb 23, 10:15 PM PST | Flash Flood Warning | SGX | Riverside | 5 hr |
| Feb 23, 10:25 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 50 min |
| Feb 23, 10:55 PM PST | Flash Flood Warning | LOX | Los Angeles | 4 hr |
| Feb 24, 12:45 AM PST | Flash Flood Warning | SGX | Orange, San Bernardino | 5 hr |
| Feb 24, 12:45 AM PST | Flash Flood Warning | SGX | Riverside, San Diego | 5 hr |
| Feb 24, 3:00 AM PST | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Feb 24, 5:45 AM PST | Flash Flood Warning | SGX | Orange, Riverside, San Diego | 2 hr |
| Feb 24, 5:45 AM PST | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Mar 13, 12:22 PM PST | Flash Flood Warning | HNX | Fresno, Merced | 2 hr |
| Mar 13, 12:43 PM PST | Severe Thunderstorm Warning | HNX | Fresno, Kings, Madera | 2 hr |
| Mar 13, 1:51 PM PST | Flash Flood Warning | HNX | Madera | 2 hr |
| Mar 13, 2:34 PM PST | Severe Thunderstorm Warning | HNX | Kern | 56 min |
| Mar 13, 4:30 PM PST | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| Mar 13, 6:00 PM PST | Tornado Warning | LOX | Los Angeles | 60 min |
| Mar 13, 6:04 PM PST | Tornado Warning | SGX | Orange | 56 min |
| Mar 13, 6:25 PM PST | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| Mar 13, 7:05 PM PST | Tornado Warning | LOX | Los Angeles | 55 min |
| Mar 13, 7:05 PM PST | Tornado Warning | SGX | Orange | 55 min |
| Mar 13, 8:00 PM PST | Tornado Warning | LOX | Los Angeles | 60 min |
| Mar 13, 9:00 PM PST | Tornado Warning | LOX | Los Angeles | 60 min |
| Mar 24, 1:09 PM PST | Severe Thunderstorm Warning | HNX | Madera, Merced | 66 min |
| Mar 24, 1:44 PM PST | Tornado Warning | HNX | Madera, Merced | 31 min |
| Mar 24, 2:35 PM PST | Severe Thunderstorm Warning | HNX | Fresno, Kings | 40 min |
| Mar 24, 2:35 PM PST | Severe Thunderstorm Warning | HNX | Kern | 40 min |
| Mar 24, 2:47 PM PST | Severe Thunderstorm Warning | HNX | Mariposa | 28 min |
| Mar 24, 4:31 PM PST | Severe Thunderstorm Warning | STO | Sacramento, Solano | 49 min |
| Mar 24, 5:25 PM PST | Severe Thunderstorm Warning | STO | Sacramento, San Joaquin | 25 min |
| Mar 24, 5:50 PM PST | Severe Thunderstorm Warning | STO | Sacramento | 25 min |
| Mar 25, 6:21 AM PST | Flash Flood Warning | HNX | Merced | 3 hr |
| Mar 25, 1:29 PM PST | Flash Flood Warning | SGX | San Diego | 61 min |
| Mar 25, 1:29 PM PST | Severe Thunderstorm Warning | SGX | San Diego | 61 min |
| Mar 28, 12:25 PM PST | Flash Flood Warning | HNX | Kern, Tulare | 4 hr |
| Mar 28, 4:30 PM PST | Severe Thunderstorm Warning | HNX | Madera, Merced | 30 min |
| Mar 28, 5:19 PM PST | Severe Thunderstorm Warning | HNX | Madera, Merced | 26 min |
| Apr 5, 3:15 PM PDT | Severe Thunderstorm Warning | STO | Colusa, Glenn | 50 min |
| Apr 5, 6:53 PM PDT | Severe Thunderstorm Warning | HNX | Fresno, Merced | 57 min |
| Apr 5, 7:35 PM PDT | Severe Thunderstorm Warning | STO | Nevada | 50 min |
| Apr 23, 4:27 PM PDT | Flash Flood Warning | STO | Calaveras, San Joaquin | 43 min |
| Apr 23, 4:27 PM PDT | Severe Thunderstorm Warning | STO | Calaveras, San Joaquin | 43 min |
| Apr 23, 5:11 PM PDT | Flash Flood Warning | STO | Calaveras | 64 min |
| May 2, 6:11 PM PDT | Flash Flood Warning | HNX | Kern | 119 min |
| May 4, 3:42 PM PDT | Severe Thunderstorm Warning | STO | San Joaquin, Stanislaus | 43 min |
| May 4, 4:03 PM PDT | Severe Thunderstorm Warning | HNX | Kern | 57 min |
| May 4, 4:48 PM PDT | Severe Thunderstorm Warning | STO | Calaveras, San Joaquin, Stanislaus | 47 min |
| May 4, 5:54 PM PDT | Severe Thunderstorm Warning | HNX | Kings | 31 min |
| May 4, 6:38 PM PDT | Severe Thunderstorm Warning | HNX | Kings | 37 min |
| May 4, 7:49 PM PDT | Severe Thunderstorm Warning | STO | Calaveras, Tuolumne | 31 min |
| May 5, 2:11 PM PDT | Severe Thunderstorm Warning | HNX | Kern | 54 min |
| May 5, 2:23 PM PDT | Severe Thunderstorm Warning | HNX | Fresno, Kings | 57 min |
| May 5, 3:20 PM PDT | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 70 min |
| May 5, 3:27 PM PDT | Flash Flood Warning | HNX | Kern | 118 min |
| May 5, 3:27 PM PDT | Severe Thunderstorm Warning | MTR | San Benito | 63 min |
| May 5, 4:30 PM PDT | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 60 min |
| May 5, 4:38 PM PDT | Severe Thunderstorm Warning | HNX | Merced | 47 min |
| May 5, 5:14 PM PDT | Flash Flood Warning | HNX | Merced | 2 hr |
| May 5, 5:30 PM PDT | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 90 min |
| May 5, 7:00 PM PDT | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 60 min |
| May 5, 7:20 PM PDT | Flash Flood Warning | LOX | Los Angeles | 70 min |
| May 5, 7:55 PM PDT | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 2 hr |
| May 5, 8:30 PM PDT | Flash Flood Warning | LOX | Los Angeles | 90 min |
| May 5, 9:50 PM PDT | Flash Flood Warning | LOX | San Luis Obispo, Santa Barbara | 2 hr |
| May 5, 9:55 PM PDT | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| May 5, 11:55 PM PDT | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| May 6, 1:55 AM PDT | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| May 7, 5:01 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 59 min |
| May 12, 4:46 PM PDT | Tornado Warning | STO | Solano | 29 min |
| May 13, 10:01 AM PDT | Tornado Warning | LOX | Los Angeles, Ventura | 29 min |
| May 13, 10:01 AM PDT | Tornado Warning | LOX | Los Angeles, Ventura | 59 min |
| May 13, 8:26 PM PDT | Flash Flood Warning | LOX | Los Angeles | 94 min |
| May 16, 2:36 PM PDT | Tornado Warning | STO | Butte | 29 min |
| May 16, 2:39 PM PDT | Severe Thunderstorm Warning | STO | Glenn | 61 min |
| Jun 2, 3:38 PM PDT | Severe Thunderstorm Warning | STO | Colusa, Glenn | 37 min |
| Jun 6, 3:35 PM PDT | Severe Thunderstorm Warning | STO | Nevada, Placer | 60 min |
| Jun 6, 4:52 PM PDT | Severe Thunderstorm Warning | HNX | Fresno, Kings, Tulare | 58 min |
| Jun 6, 6:24 PM PDT | Severe Thunderstorm Warning | HNX | Fresno | 61 min |
| Jun 6, 7:33 PM PDT | Severe Thunderstorm Warning | STO | Shasta, Tehama | 42 min |
| Jun 7, 5:48 PM PDT | Flash Flood Warning | MFR | Siskiyou | 4 hr |
| Jun 11, 8:11 PM PDT | Flash Flood Warning | MFR | Modoc | 2 hr |
| Jun 12, 1:23 PM PDT | Flash Flood Warning | MFR | Modoc | 3 hr |
| Jun 12, 1:38 PM PDT | Flash Flood Warning | REV | Lassen | 3 hr |
| Jun 12, 1:45 PM PDT | Flash Flood Warning | LOX | Monterey | 105 min |
| Jun 12, 3:01 PM PDT | Flash Flood Warning | MFR | Siskiyou | 84 min |
| Jun 12, 3:13 PM PDT | Flash Flood Warning | STO | Shasta, Tehama | 3 hr |
| Jun 12, 3:15 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino | 45 min |
| Jun 12, 4:03 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino, Trinity | 32 min |
| Jun 12, 4:13 PM PDT | Flash Flood Warning | MFR | Modoc, Siskiyou | 3 hr |
| Jun 12, 4:16 PM PDT | Severe Thunderstorm Warning | STO | Shasta | 44 min |
| Jun 12, 4:23 PM PDT | Flash Flood Warning | STO | Plumas | 2 hr |
| Jun 12, 4:31 PM PDT | Flash Flood Warning | STO | Lake | 119 min |
| Jun 12, 4:52 PM PDT | Severe Thunderstorm Warning | STO | Shasta | 53 min |
| Jun 12, 5:23 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 47 min |
| Jun 12, 6:04 PM PDT | Flash Flood Warning | REV | Placer | 61 min |
| Jun 12, 6:10 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 60 min |
| Jun 12, 7:10 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 50 min |
| Jun 12, 7:15 PM PDT | Flash Flood Warning | MFR | Siskiyou | 2 hr |
| Jul 2, 5:24 PM PDT | Severe Thunderstorm Warning | MFR | Modoc, Siskiyou | 31 min |
| Jul 2, 5:51 PM PDT | Flash Flood Warning | MFR | Modoc, Siskiyou | 59 min |
| Jul 7, 2:33 PM PDT | Flash Flood Warning | SGX | San Bernardino | 117 min |
| Jul 7, 3:36 PM PDT | Flash Flood Warning | SGX | San Diego | 114 min |
| Jul 20, 12:53 AM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 57 min |
| Jul 20, 2:09 AM PDT | Flash Flood Warning | VEF | San Bernardino | 111 min |
| Jul 20, 3:45 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 20, 1:39 PM PDT | Flash Flood Warning | SGX | San Diego | 111 min |
| Jul 20, 3:18 PM PDT | Flash Flood Warning | SGX | San Diego | 117 min |
| Jul 21, 6:21 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 64 min |
| Jul 22, 2:55 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 22, 3:42 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 58 min |
| Jul 22, 4:08 PM PDT | Flash Flood Warning | MFR | Siskiyou | 4 hr |
| Jul 22, 4:36 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 59 min |
| Jul 22, 5:17 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 22, 5:35 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 50 min |
| Jul 22, 6:04 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 22, 6:15 PM PDT | Flash Flood Warning | MFR | Siskiyou | 4 hr |
| Jul 22, 6:42 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 48 min |
| Jul 22, 7:05 PM PDT | Flash Flood Warning | VEF | San Bernardino | 115 min |
| Jul 22, 8:05 PM PDT | Flash Flood Warning | PSR | Riverside | 2 hr |
| Jul 22, 10:51 PM PDT | Flash Flood Warning | STO | Shasta | 2 hr |
| Jul 23, 2:09 PM PDT | Flash Flood Warning | PSR | Riverside | 2 hr |
| Jul 23, 4:19 PM PDT | Flash Flood Warning | REV | Mono | 61 min |
| Jul 23, 4:55 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 65 min |
| Jul 23, 5:25 PM PDT | Flash Flood Warning | REV | Mono | 50 min |
| Jul 24, 5:10 PM PDT | Flash Flood Warning | REV | Sierra | 65 min |
| Jul 30, 3:27 PM PDT | Flash Flood Warning | REV | Lassen | 2 hr |
| Jul 30, 3:57 PM PDT | Severe Thunderstorm Warning | REV | Lassen | 63 min |
| Aug 8, 4:05 PM PDT | Flash Flood Warning | SGX | San Diego | 65 min |
| Aug 8, 5:22 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 48 min |
| Aug 9, 12:41 PM PDT | Flash Flood Warning | SGX | San Bernardino | 44 min |
| Aug 9, 2:09 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 51 min |
| Aug 11, 12:22 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 48 min |
| Aug 11, 2:20 PM PDT | Flash Flood Warning | SGX | San Bernardino | 55 min |
| Aug 11, 4:20 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 11, 4:48 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 27 min |
| Aug 11, 4:50 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 60 min |
| Aug 11, 4:55 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 65 min |
| Aug 11, 5:25 PM PDT | Flash Flood Warning | LOX | Los Angeles | 95 min |
| Aug 11, 6:20 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 40 min |
| Aug 11, 6:41 PM PDT | Flash Flood Warning | HNX | Kern | 109 min |
| Aug 11, 6:56 PM PDT | Flash Flood Warning | HNX | Kern | 59 min |
| Aug 12, 1:33 PM PDT | Flash Flood Warning | SGX | San Bernardino | 57 min |
| Aug 12, 1:49 PM PDT | Flash Flood Warning | SGX | Riverside | 56 min |
| Aug 12, 2:11 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 49 min |
| Aug 12, 3:47 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 73 min |
| Aug 12, 4:22 PM PDT | Flash Flood Warning | LOX | Ventura | 98 min |
| Aug 12, 8:29 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 46 min |
| Aug 12, 9:34 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 46 min |
| Aug 12, 10:22 PM PDT | Severe Thunderstorm Warning | PSR | Imperial, Riverside | 63 min |
| Aug 13, 3:10 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 40 min |
| Aug 13, 4:05 PM PDT | Flash Flood Warning | LOX | Los Angeles | 85 min |
| Aug 13, 5:30 PM PDT | Flash Flood Warning | LOX | Los Angeles | 90 min |
| Aug 14, 12:00 PM PDT | Flash Flood Warning | SGX | San Bernardino | 60 min |
| Aug 14, 2:21 PM PDT | Severe Thunderstorm Warning | STO | Alpine | 59 min |
| Aug 14, 2:39 PM PDT | Severe Thunderstorm Warning | HNX | Mariposa | 51 min |
| Aug 14, 3:09 PM PDT | Flash Flood Warning | STO | Alpine, Amador, Calaveras, Tuolumne | 2 hr |
| Aug 14, 3:09 PM PDT | Flash Flood Warning | STO | El Dorado | 2 hr |
| Aug 14, 3:41 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 49 min |
| Aug 14, 4:00 PM PDT | Severe Thunderstorm Warning | REV | Placer | 60 min |
| Aug 14, 4:05 PM PDT | Flash Flood Warning | HNX | Mariposa, Tuolumne | 55 min |
| Aug 14, 4:37 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 53 min |
| Aug 14, 5:00 PM PDT | Severe Thunderstorm Warning | REV | Placer | 4 hr |
| Aug 16, 5:36 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 64 min |
| Aug 24, 4:34 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 66 min |
| Aug 25, 11:33 AM PDT | Tornado Warning | VEF | San Bernardino | 62 min |
| Aug 25, 11:57 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 25, 2:02 PM PDT | Flash Flood Warning | VEF | San Bernardino | 118 min |
| Aug 30, 3:48 PM PDT | Flash Flood Warning | HNX | Kern | 2 hr |
| Aug 30, 10:06 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 39 min |
| Aug 31, 1:39 PM PDT | Flash Flood Warning | SGX | San Bernardino | 81 min |
| Aug 31, 2:35 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 55 min |
| Aug 31, 3:00 PM PDT | Flash Flood Warning | SGX | San Bernardino | 60 min |
| Aug 31, 3:07 PM PDT | Flash Flood Warning | HNX | Kern | 58 min |
| Aug 31, 3:07 PM PDT | Severe Thunderstorm Warning | HNX | Kern | 58 min |
| Aug 31, 3:37 PM PDT | Flash Flood Warning | LOX | Los Angeles | 113 min |
| Aug 31, 3:38 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 67 min |
| Aug 31, 4:07 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 58 min |
| Aug 31, 4:44 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 76 min |
| Aug 31, 4:50 PM PDT | Flash Flood Warning | LOX | Los Angeles | 85 min |
| Aug 31, 5:42 PM PDT | Flash Flood Warning | SGX | San Bernardino | 118 min |
| Aug 31, 6:00 PM PDT | Tornado Warning | LOX | Los Angeles | 30 min |
| Aug 31, 7:28 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 47 min |
| Aug 31, 7:52 PM PDT | Flash Flood Warning | VEF | San Bernardino | 118 min |
| Aug 31, 9:08 PM PDT | Severe Thunderstorm Warning | PSR | Imperial, Riverside | 47 min |
| Sep 2, 2:12 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 63 min |
| Sep 2, 2:57 PM PDT | Severe Thunderstorm Warning | HNX | Kern | 48 min |
| Sep 2, 3:01 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 89 min |
| Sep 2, 3:25 PM PDT | Severe Thunderstorm Warning | LOX | Ventura | 65 min |
| Sep 2, 3:30 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 90 min |
| Sep 2, 3:40 PM PDT | Tornado Warning | LOX | Los Angeles | 35 min |
| Sep 2, 3:44 PM PDT | Flash Flood Warning | LOX | Los Angeles | 76 min |
| Sep 2, 4:28 PM PDT | Severe Thunderstorm Warning | LOX | Ventura | 62 min |
| Sep 2, 4:48 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 72 min |
| Sep 2, 4:55 PM PDT | Flash Flood Warning | LOX | Los Angeles, Ventura | 95 min |
| Sep 3, 5:10 PM PDT | Severe Thunderstorm Warning | MTR | San Benito | 110 min |
| Sep 3, 6:12 PM PDT | Severe Thunderstorm Warning | MTR | San Benito | 53 min |
| Sep 4, 3:35 PM PDT | Severe Thunderstorm Warning | STO | Sierra | 45 min |
| Sep 7, 2:52 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 63 min |
| Sep 7, 2:53 PM PDT | Severe Thunderstorm Warning | MTR | San Benito | 2 hr |
| Sep 8, 3:32 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 48 min |
| Sep 9, 2:53 PM PDT | Flash Flood Warning | VEF | San Bernardino | 112 min |
| Sep 9, 3:52 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 38 min |
| Sep 9, 4:38 PM PDT | Severe Thunderstorm Warning | PSR | Imperial, Riverside | 52 min |
| Sep 9, 5:35 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 60 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 | 117 |
| Tornado Warning | 15 |
| Severe Thunderstorm Watch | 3 |
| Flooding | |
| Flash Flood Warning | 207 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Los Angeles County50
- San Bernardino County34
- San Diego County26
- Ventura County23
- Santa Barbara County21
- Riverside County19
- Kern County17
- Santa Clara County14
- Siskiyou County12
- Calaveras County11
- Santa Cruz County11
- San Mateo County11
- San Luis Obispo County11
- Monterey County10
- Sonoma County10
- San Benito County10
- Amador County9
- Fresno County9
- Marin County9
- Orange County9
- Merced County9
- Shasta County8
- San Joaquin County7
- Kings County7
- Alameda County7
- Contra Costa County7
- City and County of San Francisco7
- Imperial County7
- Tehama County6
- Placer County6
- Napa County6
- Madera County6
- Sacramento County5
- Stanislaus County5
- Modoc County5
- Trinity County5
- Glenn County4
- Solano County4
- Nevada County3
- Sierra County3
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19971999
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.