Alert archive / California / Flash Flood Warnings / 2021

Flash Flood Warnings in California, August 2021

25 flash flood warnings in August 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 flash flood warnings reaches back to 1986.

Flash Flood Warnings by county

Each county as a circle sized by its count in August 2021. Tap one for its archive.

Flash Flood Warnings: 25
Busiest day: August 11, 20216 flash flood 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
Aug 1, 4:02 PM PDT	Flash Flood Warning	EKA	Del Norte	58 min
Aug 9, 2:37 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Aug 9, 2:38 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside, San Bernardino	3 hr
Aug 10, 6:55 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Aug 10, 7:33 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial, Riverside	4 hr
Aug 10, 9:08 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial, Riverside	6 hr
Aug 10, 9:54 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	86 min
Aug 10, 11:22 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Aug 10, 11:27 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside, San Diego	3 hr
Aug 13, 2:32 PM PDT	Flash Flood Warning Considerable damage threat	REV	Alpine	118 min
Aug 13, 2:46 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Aug 13, 5:19 PM PDT	Flash Flood Warning	REV	Lassen, Plumas	116 min
Aug 14, 4:57 PM PDT	Flash Flood Warning	HNX	Tulare	82 min
Aug 29, 1:18 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside, San Diego	3 hr
Aug 29, 4:29 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside, San Bernardino	3 hr
Aug 29, 4:33 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	2 hr
Aug 29, 6:53 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Aug 30, 1:17 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Aug 30, 2:37 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Aug 30, 2:55 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Aug 30, 5:14 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial, Riverside	4 hr
Aug 30, 8:13 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	50 min
Aug 30, 8:18 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside	37 min
Aug 30, 9:06 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	5 hr
Aug 31, 1:24 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial, Riverside	13 hr

By county

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

Nearby

Alerts in force now Tornadoes on record The radar archive 2020 2022

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.