Alert archive / California / Excessive Heat Warnings
Excessive Heat Warnings in California, 2022
35 excessive heat warnings in 2022. 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 excessive heat warnings reaches back to 2005.
Excessive Heat Warnings by county
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Excessive Heat Warnings
- 35
- Busiest month
- July11 excessive heat warnings
- Busiest day
- August 29, 20224 excessive heat 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 |
|---|---|---|---|---|
| Jun 7, 1:15 PM PDT | Excessive Heat Warning | SGX | Riverside, San Bernardino, San Diego | 5 days |
| Jun 7, 1:31 PM PDT | Excessive Heat Warning | PSR | Imperial, Riverside, San Bernardino | 5 days |
| Jun 7, 1:48 PM PDT | Excessive Heat Warning | VEF | Inyo, San Bernardino | 5 days |
| Jun 8, 11:41 AM PDT | Excessive Heat Warning | LOX | San Luis Obispo, Santa Barbara | 3 days |
| Jun 8, 12:12 PM PDT | Excessive Heat Warning | HNX | Kern | 3 days |
| Jun 8, 2:10 PM PDT | Excessive Heat Warning | STO | 3 days | |
| Jun 14, 1:29 AM PDT | Excessive Heat Warning | PSR | Imperial, Riverside, San Bernardino | 67 hr |
| Jul 8, 2:03 AM PDT | Excessive Heat Warning | PSR | Imperial, Riverside | 4 days |
| Jul 14, 1:22 AM PDT | Excessive Heat Warning | PSR | Imperial, Riverside | 4 days |
| Jul 14, 2:28 AM PDT | Excessive Heat Warning | SGX | Riverside, San Diego | 4 days |
| Jul 15, 12:50 PM PDT | Excessive Heat Warning | HNX | Fresno, Kern, Kings, Madera, Mariposa, Merced and 1 more | 5 days |
| Jul 16, 4:59 AM PDT | Excessive Heat Warning | LOX | 15 hr | |
| Jul 20, 2:27 AM PDT | Excessive Heat Warning | PSR | Imperial, Riverside | 66 hr |
| Jul 20, 2:27 AM PDT | Excessive Heat Warning | SGX | Riverside, San Diego | 66 hr |
| Jul 20, 3:29 AM PDT | Excessive Heat Warning | VEF | San Bernardino | 65 hr |
| Jul 24, 12:50 PM PDT | Excessive Heat Warning | MFR | Siskiyou | 7 days |
| Jul 27, 2:20 AM PDT | Excessive Heat Warning | STO | 67 hr | |
| Jul 27, 4:16 AM PDT | Excessive Heat Warning | EKA | Lake, Mendocino, Trinity | 65 hr |
| Aug 15, 12:21 PM PDT | Excessive Heat Warning | HNX | Fresno, Kern, Kings, Madera, Mariposa, Merced and 1 more | 59 hr |
| Aug 22, 12:55 PM PDT | Excessive Heat Warning | LOX | 33 hr | |
| Aug 22, 1:45 PM PDT | Excessive Heat Warning | SGX | San Bernardino | 32 hr |
| Aug 29, 9:54 AM PDT | Excessive Heat Warning | PSR | Imperial, Riverside, San Bernardino | 9 days |
| Aug 29, 12:53 PM PDT | Excessive Heat Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 11 days |
| Aug 29, 2:30 PM PDT | Excessive Heat Warning | VEF | Inyo, San Bernardino | 10 days |
| Aug 29, 3:22 PM PDT | Excessive Heat Warning | LOX | Los Angeles, San Luis Obispo, Santa Barbara, Ventura | 11 days |
| Aug 30, 12:52 AM PDT | Excessive Heat Warning | HNX | Fresno, Kern, Kings, Madera, Mariposa, Merced and 1 more | 11 days |
| Aug 31, 1:50 AM PDT | Excessive Heat Warning | STO | 10 days | |
| Aug 31, 2:05 AM PDT | Excessive Heat Warning | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 9 days |
| Aug 31, 3:26 AM PDT | Excessive Heat Warning | EKA | Humboldt, Lake, Mendocino, Trinity | 10 days |
| Sep 5, 7:52 AM PDT | Excessive Heat Warning | MFR | Siskiyou | 61 hr |
| Sep 6, 1:02 PM PDT | Excessive Heat Warning | LOX | Los Angeles, San Luis Obispo, Santa Barbara, Ventura | 3 days |
| Sep 8, 8:14 PM PDT | Excessive Heat Warning | LOX | Santa Barbara | 24 hr |
| Sep 23, 12:34 PM PDT | Excessive Heat Warning | PSR | Imperial | 4 days |
| Sep 23, 12:41 PM PDT | Excessive Heat Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 5 days |
| Sep 24, 1:45 PM PDT | Excessive Heat Warning | LOX | Los Angeles | 4 days |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Riverside County11
- San Bernardino County10
- Imperial County7
- San Diego County5
- Santa Barbara County4
- Kern County4
- San Luis Obispo County3
- Fresno County3
- Kings County3
- Madera County3
- Mariposa County3
- Merced County3
- Tulare County3
- Los Angeles County3
- Inyo County2
- Siskiyou County2
- Lake County2
- Mendocino County2
- Trinity County2
- Orange County2
- Ventura County2
- Alameda County1
- Contra Costa County1
- Marin County1
- Monterey County1
- Napa County1
- San Benito County1
- San Mateo County1
- Santa Clara County1
- Santa Cruz County1
- Sonoma County1
- Humboldt County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20212023
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.