Alert archive / California / Excessive Heat Warnings / 2021
Excessive Heat Warnings in California, June 2021
22 excessive heat warnings in June 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 excessive heat warnings reaches back to 2005.
Excessive Heat Warnings by county
Each county as a circle sized by its count in June 2021. Tap one for its archive.
- Excessive Heat Warnings
- 22
- Busiest day
- June 25, 20215 excessive heat 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 |
|---|---|---|---|---|
| Jun 1, 2:08 PM PDT | Excessive Heat Warning | SGX | Riverside, San Bernardino, San Diego | 3 days |
| Jun 2, 2:15 AM PDT | Excessive Heat Warning | PSR | Imperial, Riverside, San Bernardino | 67 hr |
| Jun 2, 2:51 AM PDT | Excessive Heat Warning | HNX | 41 hr | |
| Jun 3, 12:08 PM PDT | Excessive Heat Warning | HNX | 32 hr | |
| Jun 9, 2:11 PM PDT | Excessive Heat Warning | PSR | Imperial, Riverside, San Bernardino | 11 days |
| Jun 10, 1:21 PM PDT | Excessive Heat Warning | VEF | Inyo, San Bernardino | 10 days |
| Jun 10, 1:37 PM PDT | Excessive Heat Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 10 days |
| Jun 11, 1:54 PM PDT | Excessive Heat Warning | HNX | 9 days | |
| Jun 13, 6:06 PM PDT | Excessive Heat Warning | LOX | Los Angeles, Santa Barbara | 7 days |
| Jun 14, 1:17 PM PDT | Excessive Heat Warning | MTR | Alameda, Contra Costa, Monterey, San Benito | 4 days |
| Jun 14, 2:03 PM PDT | Excessive Heat Warning | STO | 6 days | |
| Jun 15, 3:13 AM PDT | Excessive Heat Warning | EKA | Lake | 5 days |
| Jun 18, 1:37 PM PDT | Excessive Heat Warning | MFR | Siskiyou | 3 days |
| Jun 23, 2:20 PM PDT | Excessive Heat Warning | MFR | Modoc, Siskiyou | 7 days |
| Jun 24, 1:51 PM PDT | Excessive Heat Warning | STO | 5 days | |
| Jun 24, 1:56 PM PDT | Excessive Heat Warning | EKA | Lake, Mendocino, Trinity | 5 days |
| Jun 25, 12:50 PM PDT | Excessive Heat Warning | VEF | Inyo, San Bernardino | 3 days |
| Jun 25, 1:05 PM PDT | Excessive Heat Warning | SGX | Riverside, San Bernardino, San Diego | 3 days |
| Jun 25, 1:10 PM PDT | Excessive Heat Warning | HNX | 4 days | |
| Jun 25, 1:34 PM PDT | Excessive Heat Warning | LOX | Los Angeles, Santa Barbara | 3 days |
| Jun 25, 1:44 PM PDT | Excessive Heat Warning | REV | Lassen, Modoc, Plumas, Sierra | 5 days |
| Jun 26, 2:20 AM PDT | Excessive Heat Warning | PSR | Imperial, Riverside, San Bernardino | 66 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Bernardino County8
- Riverside County6
- San Diego County3
- Imperial County3
- Inyo County2
- Los Angeles County2
- Santa Barbara County2
- Lake County2
- Siskiyou County2
- Modoc County2
- Orange County1
- Alameda County1
- Contra Costa County1
- Monterey County1
- San Benito County1
- Mendocino County1
- Trinity County1
- Lassen County1
- Plumas County1
- Sierra County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.