Weather alerts in California
73,956 weather alerts since 1986, 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 since 1986. Tap one for its archive.
- Alerts
- 73,956
- Warnings
- 21,095
- Watches
- 7,745
- Advisories
- 33,703
- Busiest year
- 20255,653 alerts
- Average year
- 1,804over 41 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Bernardino County7,819
- Riverside County5,326
- San Diego County4,701
- Los Angeles County3,773
- Siskiyou County3,352
- Modoc County2,677
- Placer County2,391
- El Dorado County2,380
- Nevada County2,352
- Alpine County2,321
- Santa Barbara County2,144
- Inyo County2,082
- Orange County2,013
- Humboldt County2,003
- Kern County1,933
- Imperial County1,869
- Sonoma County1,857
- Lassen County1,843
- Monterey County1,766
- Mono County1,763
- Sierra County1,761
- Plumas County1,742
- Marin County1,729
- Santa Cruz County1,703
- San Mateo County1,694
- Ventura County1,677
- Fresno County1,668
- Tulare County1,614
- Mendocino County1,594
- Santa Clara County1,448
- Madera County1,293
- Del Norte County1,261
- Alameda County1,158
- Trinity County1,153
- Napa County1,146
- Contra Costa County1,135
- Mariposa County1,132
- San Luis Obispo County1,055
- City and County of San Francisco1,048
- Kings County1,038
18 more counties
- San Benito County979
- Merced County815
- Tuolumne County813
- Tehama County619
- Lake County583
- Shasta County517
- Butte County484
- Sacramento County420
- Glenn County363
- Amador County319
- Yuba County314
- Calaveras County314
- San Joaquin County314
- Sutter County296
- Yolo County270
- Stanislaus County246
- Colusa County219
- Solano County200
The latest warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 2:38 AM PDT | Gale Warning | EKA | 18 hr | |
| Sep 21, 4:52 PM PDT | Severe Thunderstorm Warning | STO | Plumas | 23 min |
| Sep 21, 4:32 PM PDT | Severe Thunderstorm Warning | STO | Plumas | 28 min |
| Sep 21, 3:29 PM PDT | Severe Thunderstorm Warning | STO | Plumas, Sierra | 30 min |
| Sep 16, 5:52 PM PDT | Flash Flood Warning | VEF | San Bernardino | 4 hr |
| Sep 16, 5:47 PM PDT | Dust Storm Warning | PSR | Imperial | 58 min |
| Sep 16, 5:40 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 50 min |
| Sep 16, 5:30 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino, Trinity | 45 min |
| Sep 16, 5:12 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 13 min |
| Sep 12, 2:16 AM PDT | Gale Warning | LOX | 48 hr | |
| Sep 11, 8:36 PM PDT | Gale Warning | MTR | 48 hr | |
| Sep 11, 10:18 AM PDT | Red Flag Warning | REV | Lassen, Madera, Modoc, Mono | 38 hr |
Nearby
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.