Alert archive / California / Red Flag Warnings
Red Flag Warnings in California, 2021
117 red flag warnings in 2021. 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 2021. Tap one for its archive.
- Red Flag Warnings
- 117
- Busiest month
- June30 red flag warnings
- Busiest day
- July 17, 20216 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 |
|---|---|---|---|---|
| Jan 13, 12:51 PM PST | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 3 days |
| Jan 13, 2:45 PM PST | Red Flag Warning | LOX | Los Angeles | 3 days |
| Jan 18, 9:50 AM PST | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 36 hr |
| Jan 18, 9:52 AM PST | Red Flag Warning | MTR | Monterey, San Benito | 29 hr |
| Jan 18, 11:40 AM PST | Red Flag Warning | LOX | Los Angeles | 46 hr |
| Apr 12, 1:48 PM PDT | Red Flag Warning | VEF | Inyo, San Bernardino, Tulare | 32 hr |
| Apr 23, 12:38 PM PDT | Red Flag Warning | VEF | San Bernardino | 55 hr |
| May 1, 1:59 PM PDT | Red Flag Warning | STO | 3 days | |
| May 7, 9:54 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa | 4 days |
| May 7, 12:14 PM PDT | Red Flag Warning | STO | 4 days | |
| May 13, 2:22 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 30 hr |
| May 18, 3:09 PM PDT | Red Flag Warning | VEF | Inyo, San Bernardino | 59 hr |
| May 19, 2:47 AM PDT | Red Flag Warning | PSR | Imperial, Riverside | 41 hr |
| May 20, 3:52 AM PDT | Red Flag Warning | VEF | San Bernardino | 40 hr |
| Jun 4, 3:48 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 41 hr |
| Jun 5, 11:32 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 35 hr |
| Jun 5, 11:32 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 59 hr |
| Jun 5, 1:32 PM PDT | Red Flag Warning | VEF | Inyo, Tulare | 4 days |
| Jun 5, 1:53 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Jun 6, 1:30 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Jun 7, 1:12 PM PDT | Red Flag Warning | REV | Madera, Mono | 34 hr |
| Jun 7, 1:12 PM PDT | Red Flag Warning | REV | Madera, Mono | 57 hr |
| Jun 13, 11:38 AM PDT | Red Flag Warning | REV | Madera, Mono | 33 hr |
| Jun 13, 1:17 PM PDT | Red Flag Warning | VEF | Inyo, Tulare | 32 hr |
| Jun 13, 1:17 PM PDT | Red Flag Warning | VEF | Inyo, Tulare | 56 hr |
| Jun 13, 3:24 PM PDT | Red Flag Warning | LOX | 61 hr | |
| Jun 17, 12:26 PM PDT | Red Flag Warning | VEF | Inyo, Tulare | 32 hr |
| Jun 17, 1:17 PM PDT | Red Flag Warning | MFR | Modoc | 32 hr |
| Jun 18, 1:58 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Jun 20, 2:04 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 57 hr |
| Jun 20, 2:06 PM PDT | Red Flag Warning | VEF | Inyo, San Bernardino, Tulare | 55 hr |
| Jun 21, 5:40 AM PDT | Red Flag Warning | REV | Lassen, Modoc, Plumas, Sierra | 23 hr |
| Jun 21, 1:55 PM PDT | Red Flag Warning | MFR | Siskiyou | 33 hr |
| Jun 22, 3:18 AM PDT | Red Flag Warning | REV | Madera, Mono | 18 hr |
| Jun 22, 2:19 PM PDT | Red Flag Warning | VEF | San Bernardino | 30 hr |
| Jun 22, 2:34 PM PDT | Red Flag Warning | MFR | Siskiyou | 32 hr |
| Jun 23, 2:15 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 29 hr |
| Jun 23, 7:55 PM PDT | Red Flag Warning | EKA | 26 hr | |
| Jun 24, 3:54 AM PDT | Red Flag Warning | STO | 17 hr | |
| Jun 27, 11:21 AM PDT | Red Flag Warning | REV | Madera, Mono | 33 hr |
| Jun 27, 11:21 AM PDT | Red Flag Warning | REV | El Dorado, Madera, Mono, Nevada, Placer, Sierra | 60 hr |
| Jun 27, 11:26 AM PDT | Red Flag Warning | VEF | Inyo, Tulare | 57 hr |
| Jun 27, 11:57 AM PDT | Red Flag Warning | HNX | Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne | 56 hr |
| Jun 27, 2:30 PM PDT | Red Flag Warning | MFR | Siskiyou | 31 hr |
| Jul 3, 1:41 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 29 hr |
| Jul 4, 1:35 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 30 hr |
| Jul 5, 2:46 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 29 hr |
| Jul 7, 4:14 AM PDT | Red Flag Warning | MFR | Modoc | 16 hr |
| Jul 7, 2:16 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 30 hr |
| Jul 10, 2:29 AM PDT | Red Flag Warning | MFR | Modoc | 20 hr |
| Jul 11, 8:51 PM PDT | Red Flag Warning | MFR | Modoc | 3 days |
| Jul 15, 2:22 AM PDT | Red Flag Warning | MFR | Modoc | 18 hr |
| Jul 15, 2:30 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Jul 16, 1:14 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Jul 17, 11:01 AM PDT | Red Flag Warning | HNX | Fresno, Kern, Kings, Madera, Mariposa, Merced and 2 more | 40 hr |
| Jul 17, 11:54 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 39 hr |
| Jul 17, 12:06 PM PDT | Red Flag Warning | VEF | Inyo, Tulare | 39 hr |
| Jul 17, 1:13 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 31 hr |
| Jul 17, 1:47 PM PDT | Red Flag Warning | MTR | Monterey, San Benito, San Mateo, Santa Clara, Santa Cruz | 37 hr |
| Jul 17, 2:56 PM PDT | Red Flag Warning | LOX | Santa Barbara | 37 hr |
| Jul 18, 2:30 AM PDT | Red Flag Warning | STO | 24 hr | |
| Jul 18, 12:57 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Jul 19, 1:15 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Jul 20, 3:04 PM PDT | Red Flag Warning | MFR | Modoc | 29 hr |
| Jul 21, 1:32 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Jul 28, 5:00 AM PDT | Red Flag Warning | MFR | Siskiyou | 42 hr |
| Jul 29, 12:06 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 31 hr |
| Jul 30, 4:13 AM PDT | Red Flag Warning | EKA | 16 hr | |
| Jul 30, 12:48 PM PDT | Red Flag Warning | MFR | Siskiyou | 33 hr |
| Aug 2, 3:19 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 29 hr |
| Aug 3, 10:08 AM PDT | Red Flag Warning | STO | 59 hr | |
| Aug 3, 1:27 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 33 hr |
| Aug 4, 3:30 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 42 hr |
| Aug 4, 2:01 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Aug 12, 1:44 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 29 hr |
| Aug 15, 2:26 PM PDT | Red Flag Warning | MFR | Modoc | 32 hr |
| Aug 16, 1:08 PM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 33 hr |
| Aug 16, 1:45 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 32 hr |
| Aug 16, 3:17 PM PDT | Red Flag Warning | EKA | 68 hr | |
| Aug 17, 3:00 AM PDT | Red Flag Warning | STO | 65 hr | |
| Aug 17, 3:47 AM PDT | Red Flag Warning | MTR | 32 hr | |
| Aug 20, 12:54 PM PDT | Red Flag Warning | STO | 31 hr | |
| Aug 23, 1:06 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Aug 26, 9:49 AM PDT | Red Flag Warning | STO | 49 hr | |
| Aug 28, 1:47 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Aug 29, 2:13 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 4 days |
| Aug 29, 3:44 AM PDT | Red Flag Warning | MFR | Modoc | 40 hr |
| Aug 29, 9:30 AM PDT | Red Flag Warning | STO | 4 days | |
| Sep 4, 2:30 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Sep 6, 2:00 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 30 hr |
| Sep 8, 8:42 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 44 hr |
| Sep 9, 3:53 AM PDT | Red Flag Warning | EKA | 25 hr | |
| Sep 9, 9:30 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Napa, Sonoma | 23 hr |
| Sep 9, 9:48 AM PDT | Red Flag Warning | STO | 37 hr | |
| Sep 9, 10:33 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Nevada, Placer, Plumas, Sierra | 36 hr |
| Sep 12, 1:56 PM PDT | Red Flag Warning | MFR | Siskiyou | 41 hr |
| Sep 13, 3:39 AM PDT | Red Flag Warning | EKA | 26 hr | |
| Sep 17, 11:35 AM PDT | Red Flag Warning | REV | Lassen, Modoc | 32 hr |
| Sep 17, 4:47 PM PDT | Red Flag Warning | HNX | Fresno, Kern, Tulare | 51 hr |
| Sep 19, 9:46 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa | 34 hr |
| Sep 19, 10:21 AM PDT | Red Flag Warning | EKA | 40 hr | |
| Sep 19, 10:58 AM PDT | Red Flag Warning | STO | 45 hr | |
| Sep 25, 2:12 PM PDT | Red Flag Warning | MFR | Modoc | 29 hr |
| Sep 26, 9:28 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 42 hr |
| Sep 28, 2:50 AM PDT | Red Flag Warning | STO | 17 hr | |
| Sep 29, 10:27 AM PDT | Red Flag Warning | MTR | 22 hr | |
| Oct 10, 3:03 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Monterey, San Benito, San Mateo, Santa Clara and 1 more | 62 hr |
| Oct 10, 3:15 AM PDT | Red Flag Warning | STO | 64 hr | |
| Oct 10, 3:19 AM PDT | Red Flag Warning | EKA | 64 hr | |
| Oct 10, 1:22 PM PDT | Red Flag Warning | HNX | Fresno, Kern, Kings, Madera, Mariposa, Merced and 1 more | 34 hr |
| Oct 12, 2:28 PM PDT | Red Flag Warning | STO | 54 hr | |
| Oct 13, 2:11 PM PDT | Red Flag Warning | LOX | Los Angeles | 3 days |
| Oct 17, 5:38 AM PDT | Red Flag Warning | REV | Madera, Mono | 20 hr |
| Nov 19, 1:35 PM PST | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 53 hr |
| Nov 19, 2:15 PM PST | Red Flag Warning | LOX | Los Angeles | 3 days |
| Nov 23, 9:29 AM PST | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 3 days |
| Nov 23, 9:34 AM PST | Red Flag Warning | LOX | Los Angeles | 3 days |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Modoc County46
- Siskiyou County21
- Madera County16
- Mono County13
- Tulare County12
- Lassen County11
- Sierra County11
- San Bernardino County10
- El Dorado County10
- Nevada County10
- Placer County10
- Plumas County10
- Inyo County9
- Riverside County5
- Los Angeles County5
- Orange County4
- San Diego County4
- Alameda County4
- Contra Costa County4
- Fresno County4
- Kern County4
- Monterey County3
- San Benito County3
- Mariposa County3
- Tuolumne County2
- Kings County2
- Merced County2
- San Mateo County2
- Santa Clara County2
- Santa Cruz County2
- Imperial County1
- Santa Barbara County1
- Marin County1
- Napa County1
- Sonoma County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.