Alert archive / California / Red Flag Warnings
Red Flag Warnings in California, 2020
138 red flag warnings in 2020. 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 2020. Tap one for its archive.
- Red Flag Warnings
- 138
- Busiest month
- September35 red flag warnings
- Busiest day
- September 6, 20209 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 16, 2:41 AM PDT | Red Flag Warning | VEF | Inyo, Tulare | 65 hr |
| May 16, 10:34 AM PDT | Red Flag Warning | REV | Madera, Mono | 32 hr |
| May 21, 12:59 PM PDT | Red Flag Warning | VEF | Inyo, San Bernardino | 31 hr |
| May 28, 1:05 PM PDT | Red Flag Warning | VEF | Inyo, Tulare | 55 hr |
| May 29, 2:07 PM PDT | Red Flag Warning | REV | Madera, Mono | 30 hr |
| Jun 4, 1:45 PM PDT | Red Flag Warning | VEF | San Bernardino | 30 hr |
| Jun 7, 3:42 AM PDT | Red Flag Warning | VEF | Inyo, Tulare | 16 hr |
| Jun 7, 3:49 AM PDT | Red Flag Warning | REV | Madera, Mono | 16 hr |
| Jun 7, 9:39 AM PDT | Red Flag Warning | LOX | Los Angeles | 33 hr |
| Jun 7, 9:54 AM PDT | Red Flag Warning | STO | 34 hr | |
| Jun 8, 7:52 AM PDT | Red Flag Warning | VEF | San Bernardino | 7 hr |
| Jun 11, 10:49 AM PDT | Red Flag Warning | REV | Madera, Mono | 33 hr |
| Jun 11, 2:34 PM PDT | Red Flag Warning | VEF | Inyo, San Bernardino, Tulare | 32 hr |
| Jun 14, 12:39 PM PDT | Red Flag Warning | REV | Madera, Mono | 32 hr |
| Jun 15, 2:59 PM PDT | Red Flag Warning | REV | Madera, Mono | 29 hr |
| Jun 16, 3:30 AM PDT | Red Flag Warning | STO | 65 hr | |
| Jun 26, 9:00 AM PDT | Red Flag Warning | REV | Madera, Mono | 62 hr |
| Jun 26, 1:05 PM PDT | Red Flag Warning | VEF | Inyo, San Bernardino, Tulare | 3 days |
| Jun 27, 2:15 PM PDT | Red Flag Warning | STO | 54 hr | |
| Jun 28, 1:59 AM PDT | Red Flag Warning | MTR | 42 hr | |
| Jun 28, 10:10 AM PDT | Red Flag Warning | EKA | 32 hr | |
| Jul 5, 2:58 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 42 hr |
| Jul 5, 10:29 PM PDT | Red Flag Warning | MFR | Modoc | 22 hr |
| Jul 10, 12:56 PM PDT | Red Flag Warning | MFR | Modoc | 33 hr |
| Jul 11, 10:56 AM PDT | Red Flag Warning | REV | Modoc | 34 hr |
| Jul 11, 12:52 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Jul 15, 9:33 AM PDT | Red Flag Warning | REV | Madera, Mono | 34 hr |
| Jul 20, 1:53 PM PDT | Red Flag Warning | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 55 hr |
| Jul 21, 12:08 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 35 hr |
| Jul 25, 2:20 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 54 hr |
| Jul 26, 6:06 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 39 hr |
| Jul 27, 9:06 AM PDT | Red Flag Warning | EKA | 13 hr | |
| Jul 28, 1:04 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 3 days |
| Aug 4, 2:42 PM PDT | Red Flag Warning | MFR | Siskiyou | 32 hr |
| Aug 11, 10:40 AM PDT | Red Flag Warning | REV | Lassen, Modoc, Plumas, Sierra | 34 hr |
| Aug 11, 2:30 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Aug 12, 2:30 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Aug 15, 10:27 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 49 hr |
| Aug 15, 11:20 AM PDT | Red Flag Warning | STO | 58 hr | |
| Aug 15, 11:22 AM PDT | Red Flag Warning | EKA | 31 hr | |
| Aug 15, 11:49 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 33 hr |
| Aug 15, 10:49 PM PDT | Red Flag Warning | LOX | Santa Barbara | 11 hr |
| Aug 16, 3:42 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 25 hr |
| Aug 16, 4:20 AM PDT | Red Flag Warning | EKA | 8 hr | |
| Aug 16, 12:06 PM PDT | Red Flag Warning | EKA | 16 hr | |
| Aug 16, 12:57 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 55 hr |
| Aug 17, 3:47 AM PDT | Red Flag Warning | EKA | 15 hr | |
| Aug 18, 2:16 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Aug 18, 2:23 PM PDT | Red Flag Warning | REV | Lassen, Modoc, Plumas, Sierra | 31 hr |
| Aug 19, 3:20 AM PDT | Red Flag Warning | STO | 30 hr | |
| Aug 19, 9:28 AM PDT | Red Flag Warning | EKA | 24 hr | |
| Aug 22, 1:35 AM PDT | Red Flag Warning | MFR | Modoc | 42 hr |
| Aug 22, 11:48 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 46 hr |
| Aug 22, 1:31 PM PDT | Red Flag Warning | STO | 57 hr | |
| Aug 22, 1:48 PM PDT | Red Flag Warning | EKA | 57 hr | |
| Aug 22, 6:25 PM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 41 hr |
| Aug 23, 2:41 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 44 hr |
| Aug 23, 9:23 PM PDT | Red Flag Warning | REV | Lassen, Modoc | 33 hr |
| Aug 25, 6:10 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 14 hr |
| Aug 30, 3:00 AM PDT | Red Flag Warning | EKA | 32 hr | |
| Sep 3, 12:39 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Sep 4, 10:15 AM PDT | Red Flag Warning | SGX | Riverside, San Bernardino, San Diego | 56 hr |
| Sep 4, 1:58 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Sep 5, 10:05 AM PDT | Red Flag Warning | LOX | 60 hr | |
| Sep 5, 8:22 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 4 days |
| Sep 6, 5:41 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 66 hr |
| Sep 6, 8:14 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 60 hr |
| Sep 6, 1:00 PM PDT | Red Flag Warning | HNX | Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne | 3 days |
| Sep 6, 1:16 PM PDT | Red Flag Warning | VEF | Inyo, San Bernardino, Tulare | 3 days |
| Sep 6, 2:10 PM PDT | Red Flag Warning | STO | 3 days | |
| Sep 6, 2:16 PM PDT | Red Flag Warning | EKA | 70 hr | |
| Sep 6, 2:32 PM PDT | Red Flag Warning | MTR | San Mateo, Santa Clara, Santa Cruz | 65 hr |
| Sep 6, 2:44 PM PDT | Red Flag Warning | PSR | Imperial, Riverside, San Bernardino | 57 hr |
| Sep 7, 1:09 PM PDT | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 55 hr |
| Sep 7, 3:20 PM PDT | Red Flag Warning | LOX | Los Angeles | 51 hr |
| Sep 9, 10:15 AM PDT | Red Flag Warning | PSR | Imperial, Riverside | 7 hr |
| Sep 9, 2:59 PM PDT | Red Flag Warning | MFR | Siskiyou | 29 hr |
| Sep 11, 2:32 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 54 hr |
| Sep 13, 1:52 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 31 hr |
| Sep 13, 2:27 PM PDT | Red Flag Warning | STO | 30 hr | |
| Sep 13, 7:51 PM PDT | Red Flag Warning | REV | Lassen, Modoc, Plumas, Sierra | 24 hr |
| Sep 14, 1:04 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 31 hr |
| Sep 15, 2:39 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 29 hr |
| Sep 16, 1:34 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Sep 16, 3:12 PM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 53 hr |
| Sep 16, 3:12 PM PDT | Red Flag Warning | REV | Lassen, Modoc | 53 hr |
| Sep 25, 3:27 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Napa, Sonoma | 4 days |
| Sep 25, 10:08 AM PDT | Red Flag Warning | STO | 3 days | |
| Sep 25, 10:12 AM PDT | Red Flag Warning | EKA | 3 days | |
| Sep 26, 2:38 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 67 hr |
| Sep 27, 1:03 PM PDT | Red Flag Warning | SGX | Riverside, San Bernardino, San Diego | 52 hr |
| Sep 27, 3:05 PM PDT | Red Flag Warning | LOX | Los Angeles | 26 hr |
| Sep 30, 9:07 AM PDT | Red Flag Warning | MTR | Monterey, San Mateo, Santa Clara, Santa Cruz | 69 hr |
| Sep 30, 2:41 PM PDT | Red Flag Warning | LOX | 18 hr | |
| Sep 30, 4:28 PM PDT | Red Flag Warning | EKA | 52 hr | |
| Oct 3, 12:59 PM PDT | Red Flag Warning | MFR | Modoc | 31 hr |
| Oct 3, 4:03 PM PDT | Red Flag Warning | MTR | 11 hr | |
| Oct 3, 4:31 PM PDT | Red Flag Warning | EKA | 13 hr | |
| Oct 9, 11:26 AM PDT | Red Flag Warning | REV | El Dorado, Madera, Mono, Nevada, Placer, Sierra | 33 hr |
| Oct 13, 9:48 AM PDT | Red Flag Warning | STO | 4 days | |
| Oct 13, 10:00 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Napa, San Mateo, Santa Clara and 2 more | 4 days |
| Oct 13, 11:45 AM PDT | Red Flag Warning | EKA | 4 days | |
| Oct 14, 2:30 PM PDT | Red Flag Warning | VEF | San Bernardino | 29 hr |
| Oct 14, 2:50 PM PDT | Red Flag Warning | MFR | Siskiyou | 51 hr |
| Oct 15, 9:52 AM PDT | Red Flag Warning | LOX | Los Angeles | 32 hr |
| Oct 15, 10:00 AM PDT | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 32 hr |
| Oct 19, 10:54 AM PDT | Red Flag Warning | EKA | 45 hr | |
| Oct 19, 10:57 AM PDT | Red Flag Warning | MTR | 45 hr | |
| Oct 19, 12:51 PM PDT | Red Flag Warning | STO | 4 days | |
| Oct 20, 10:46 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, San Mateo, Santa Clara, Santa Cruz | 64 hr |
| Oct 21, 4:49 AM PDT | Red Flag Warning | EKA | 54 hr | |
| Oct 21, 12:53 PM PDT | Red Flag Warning | MFR | Siskiyou | 46 hr |
| Oct 23, 12:08 PM PDT | Red Flag Warning | EKA | 4 days | |
| Oct 23, 12:58 PM PDT | Red Flag Warning | MFR | Siskiyou | 4 days |
| Oct 23, 1:28 PM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Napa, City and County of San Francisco, San Mateo and 3 more | 4 days |
| Oct 23, 2:24 PM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Mono, Nevada, Placer and 2 more | 4 days |
| Oct 23, 2:58 PM PDT | Red Flag Warning | STO | 4 days | |
| Oct 24, 1:40 PM PDT | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 3 days |
| Oct 24, 1:44 PM PDT | Red Flag Warning | LOX | Los Angeles | 3 days |
| Oct 24, 2:04 PM PDT | Red Flag Warning | HNX | Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne | 3 days |
| Oct 25, 2:24 AM PDT | Red Flag Warning | VEF | Inyo, San Bernardino, Tulare | 61 hr |
| Oct 25, 2:17 PM PDT | Red Flag Warning | PSR | Imperial, Riverside, San Bernardino | 31 hr |
| Oct 26, 9:07 PM PDT | Red Flag Warning | PSR | Imperial, Riverside | 17 hr |
| Nov 4, 1:40 PM PST | Red Flag Warning | REV | El Dorado, Madera, Mono, Nevada, Placer, Sierra | 50 hr |
| Nov 4, 2:55 PM PST | Red Flag Warning | VEF | Inyo, Tulare | 53 hr |
| Nov 25, 1:02 PM PST | Red Flag Warning | VEF | San Bernardino | 51 hr |
| Nov 25, 1:25 PM PST | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 68 hr |
| Nov 25, 3:20 PM PST | Red Flag Warning | LOX | Los Angeles | 3 days |
| Dec 1, 12:11 PM PST | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 71 hr |
| Dec 1, 2:29 PM PST | Red Flag Warning | LOX | Los Angeles | 4 days |
| Dec 2, 1:55 AM PST | Red Flag Warning | HNX | Kern | 64 hr |
| Dec 5, 12:59 PM PST | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 3 days |
| Dec 5, 2:37 PM PST | Red Flag Warning | LOX | Los Angeles | 3 days |
| Dec 6, 3:18 AM PST | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Napa, San Mateo, Santa Clara and 2 more | 38 hr |
| Dec 6, 11:16 AM PST | Red Flag Warning | HNX | Fresno, Kern, Tulare | 55 hr |
| Dec 6, 3:15 PM PST | Red Flag Warning | STO | 26 hr | |
| Dec 22, 9:55 AM PST | Red Flag Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 50 hr |
| Dec 22, 11:59 AM PST | Red Flag Warning | LOX | Los Angeles | 51 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Modoc County38
- San Bernardino County20
- Madera County18
- Siskiyou County18
- Mono County16
- Lassen County14
- Sierra County14
- Riverside County13
- Plumas County12
- Tulare County11
- El Dorado County11
- Nevada County11
- Placer County11
- Inyo County9
- Los Angeles County9
- San Diego County9
- San Mateo County8
- Santa Clara County8
- Santa Cruz County8
- Alameda County7
- Contra Costa County7
- Orange County7
- Marin County6
- Napa County6
- Sonoma County6
- Kern County4
- Imperial County4
- Monterey County3
- City and County of San Francisco3
- Fresno County3
- San Benito County2
- Mariposa County2
- Tuolumne County2
- Santa Barbara County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.