Alert archive / California / Red Flag Warnings
Red Flag Warnings in California, 2026
50 red flag warnings in 2026. 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 red flag warnings reaches back to 2005.
Red Flag Warnings by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Red Flag Warnings
- 50
- Busiest month
- August15 red flag warnings
- Busiest day
- May 15, 20263 red flag 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 |
|---|---|---|---|---|
| May 12, 9:52 AM PDT | Red Flag Warning | HNX | Fresno, Kern, Kings, Merced | 12 hr |
| May 15, 10:51 AM PDT | Red Flag Warning | STO | Amador, Butte, Calaveras, Colusa, El Dorado, Glenn and 12 more | 3 days |
| May 15, 11:38 AM PDT | Red Flag Warning | HNX | Fresno, Kern, Kings, Madera, Mariposa, Merced and 1 more | 3 days |
| May 15, 1:14 PM PDT | Red Flag Warning | LOX | Los Angeles | 33 hr |
| May 24, 11:56 AM PDT | Red Flag Warning | MFR | Modoc | 35 hr |
| May 24, 1:05 PM PDT | Red Flag Warning | REV | Lassen, Modoc | 34 hr |
| Jun 5, 9:29 AM PDT | Red Flag Warning | REV | Lassen | 37 hr |
| Jun 5, 11:02 AM PDT | Red Flag Warning | PSR | Imperial, Riverside | 36 hr |
| Jun 8, 9:18 AM PDT | Red Flag Warning | STO | Butte, Colusa, Glenn, Nevada, Placer, Shasta and 5 more | 3 days |
| Jun 9, 9:38 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Napa, Sonoma | 47 hr |
| Jun 9, 9:44 AM PDT | Red Flag Warning | EKA | Lake | 55 hr |
| Jun 18, 11:55 AM PDT | Red Flag Warning | EKA | Humboldt, Siskiyou, Trinity | 31 hr |
| Jun 18, 12:51 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 33 hr |
| Jun 18, 1:49 PM PDT | Red Flag Warning | REV | Lassen, Modoc | 33 hr |
| Jun 18, 7:56 PM PDT | Red Flag Warning | STO | Shasta | 23 hr |
| Jun 23, 9:13 AM PDT | Red Flag Warning | VEF | San Bernardino | 26 hr |
| Jun 23, 10:28 AM PDT | Red Flag Warning | SGX | San Bernardino | 25 hr |
| Jun 25, 12:54 AM PDT | Red Flag Warning | VEF | Inyo, San Bernardino | 4 days |
| Jun 25, 1:07 AM PDT | Red Flag Warning | PSR | Imperial, Riverside | 4 days |
| Jun 25, 11:12 AM PDT | Red Flag Warning | HNX | Kern, Tulare | 60 hr |
| Jul 9, 9:53 AM PDT | Red Flag Warning | REV | Lassen, Modoc | 35 hr |
| Jul 9, 12:59 PM PDT | Red Flag Warning | MFR | Modoc | 3 days |
| Jul 13, 1:40 PM PDT | Red Flag Warning | EKA | Humboldt, Siskiyou, Trinity | 36 hr |
| Jul 14, 1:28 PM PDT | Red Flag Warning | LOX | Los Angeles, Santa Barbara, Ventura | 44 hr |
| Jul 16, 11:39 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 32 hr |
| Jul 19, 3:37 PM PDT | Red Flag Warning | EKA | Humboldt, Siskiyou, Trinity | 26 hr |
| Jul 23, 10:10 AM PDT | Red Flag Warning | REV | Lassen, Modoc | 59 hr |
| Jul 23, 11:38 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 57 hr |
| Jul 25, 9:29 AM PDT | Red Flag Warning | REV | Lassen, Modoc | 36 hr |
| Jul 25, 9:46 AM PDT | Red Flag Warning | MFR | Modoc | 34 hr |
| Aug 3, 12:48 PM PDT | Red Flag Warning | MFR | Siskiyou | 56 hr |
| Aug 5, 12:31 PM PDT | Red Flag Warning | MFR | Siskiyou | 31 hr |
| Aug 12, 11:04 AM PDT | Red Flag Warning | STO | Alpine, Amador, Calaveras, El Dorado, Tuolumne | 30 hr |
| Aug 20, 9:28 AM PDT | Red Flag Warning | MFR | Siskiyou | 12 hr |
| Aug 20, 9:28 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 35 hr |
| Aug 21, 7:37 AM PDT | Red Flag Warning | REV | Lassen, Modoc | 39 hr |
| Aug 21, 9:30 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 36 hr |
| Aug 23, 11:59 AM PDT | Red Flag Warning | MFR | Siskiyou | 32 hr |
| Aug 24, 1:46 PM PDT | Red Flag Warning | LOX | Los Angeles, San Luis Obispo, Santa Barbara, Ventura | 4 days |
| Aug 25, 12:48 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Aug 26, 10:12 AM PDT | Red Flag Warning | MFR | Modoc | 34 hr |
| Aug 27, 11:07 AM PDT | Red Flag Warning | MTR | Monterey, San Benito, San Mateo, Santa Clara, Santa Cruz | 28 hr |
| Aug 27, 1:33 PM PDT | Red Flag Warning | LOX | San Luis Obispo | 25 hr |
| Aug 30, 12:56 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 31 hr |
| Aug 31, 11:42 AM PDT | Red Flag Warning | REV | Lassen, Modoc | 35 hr |
| Sep 6, 10:40 AM PDT | Red Flag Warning | REV | Madera, Mono | 9 hr |
| Sep 11, 10:02 AM PDT | Red Flag Warning | STO | Butte, Colusa, Glenn, Nevada, Placer, Plumas and 4 more | 3 days |
| Sep 11, 10:09 AM PDT | Red Flag Warning | EKA | Lake | 40 hr |
| Sep 11, 10:18 AM PDT | Red Flag Warning | REV | Lassen, Madera, Modoc, Mono | 38 hr |
| Sep 23, 10:43 AM PDT | Red Flag Warning | MFR | Modoc | 32 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Modoc County20
- Siskiyou County13
- Lassen County9
- Shasta County4
- Kern County3
- Butte County3
- Colusa County3
- Glenn County3
- Nevada County3
- Placer County3
- Sutter County3
- Tehama County3
- Yuba County3
- Madera County3
- Los Angeles County3
- Humboldt County3
- Trinity County3
- San Bernardino County3
- Fresno County2
- Kings County2
- Merced County2
- Amador County2
- Calaveras County2
- El Dorado County2
- Solano County2
- Tuolumne County2
- Yolo County2
- Tulare County2
- Imperial County2
- Riverside County2
- Lake County2
- Santa Barbara County2
- Ventura County2
- San Luis Obispo County2
- Mono County2
- Sacramento County1
- San Joaquin County1
- Stanislaus County1
- Mariposa County1
- Alameda County1
The busiest days
Days with the most alerts issued, by UTC date.
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. Warning verification from the Mesonet's Cow. Rebuilt daily.