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.

IssuedProductOfficeCountiesLasted
Jun 1, 2:08 PM PDTExcessive Heat WarningSGXRiverside, San Bernardino, San Diego3 days
Jun 2, 2:15 AM PDTExcessive Heat WarningPSRImperial, Riverside, San Bernardino67 hr
Jun 2, 2:51 AM PDTExcessive Heat WarningHNX41 hr
Jun 3, 12:08 PM PDTExcessive Heat WarningHNX32 hr
Jun 9, 2:11 PM PDTExcessive Heat WarningPSRImperial, Riverside, San Bernardino11 days
Jun 10, 1:21 PM PDTExcessive Heat WarningVEFInyo, San Bernardino10 days
Jun 10, 1:37 PM PDTExcessive Heat WarningSGXOrange, Riverside, San Bernardino, San Diego10 days
Jun 11, 1:54 PM PDTExcessive Heat WarningHNX9 days
Jun 13, 6:06 PM PDTExcessive Heat WarningLOXLos Angeles, Santa Barbara7 days
Jun 14, 1:17 PM PDTExcessive Heat WarningMTRAlameda, Contra Costa, Monterey, San Benito4 days
Jun 14, 2:03 PM PDTExcessive Heat WarningSTO6 days
Jun 15, 3:13 AM PDTExcessive Heat WarningEKALake5 days
Jun 18, 1:37 PM PDTExcessive Heat WarningMFRSiskiyou3 days
Jun 23, 2:20 PM PDTExcessive Heat WarningMFRModoc, Siskiyou7 days
Jun 24, 1:51 PM PDTExcessive Heat WarningSTO5 days
Jun 24, 1:56 PM PDTExcessive Heat WarningEKALake, Mendocino, Trinity5 days
Jun 25, 12:50 PM PDTExcessive Heat WarningVEFInyo, San Bernardino3 days
Jun 25, 1:05 PM PDTExcessive Heat WarningSGXRiverside, San Bernardino, San Diego3 days
Jun 25, 1:10 PM PDTExcessive Heat WarningHNX4 days
Jun 25, 1:34 PM PDTExcessive Heat WarningLOXLos Angeles, Santa Barbara3 days
Jun 25, 1:44 PM PDTExcessive Heat WarningREVLassen, Modoc, Plumas, Sierra5 days
Jun 26, 2:20 AM PDTExcessive Heat WarningPSRImperial, Riverside, San Bernardino66 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

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.