Alert archive / California / Red Flag Warnings / 2026
Red Flag Warnings in California, May 2026
6 red flag warnings in May 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 May 2026. Tap one for its archive.
- Red Flag Warnings
- 6
- Busiest day
- May 15, 20263 red flag warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fresno County2
- Kern County2
- Kings County2
- Merced County2
- Modoc County2
- Amador County1
- Butte County1
- Calaveras County1
- Colusa County1
- El Dorado County1
- Glenn County1
- Nevada County1
- Placer County1
- Sacramento County1
- San Joaquin County1
- Shasta County1
- Solano County1
- Stanislaus County1
- Sutter County1
- Tehama County1
- Tuolumne County1
- Yolo County1
- Yuba County1
- Madera County1
- Mariposa County1
- Tulare County1
- Los Angeles County1
- Lassen County1
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.