Alert archive / California / Flash Flood Warnings / 2023

Flash Flood Warnings in California, September 2023

36 flash flood warnings in September 2023. 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 September 2023. Tap one for its archive.

Flash Flood Warnings: 36
Busiest day: September 1, 202318 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 31, 7:17 PM PDT	Flash Flood Warning	VEF	San Bernardino	88 min
Sep 1, 1:38 AM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	5 hr
Sep 1, 3:42 AM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	4 hr
Sep 1, 4:36 AM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Sep 1, 4:45 AM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	4 hr
Sep 1, 1:18 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial	4 hr
Sep 1, 1:24 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial	6 hr
Sep 1, 2:03 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial	4 hr
Sep 1, 2:16 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside, San Bernardino	6 hr
Sep 1, 2:33 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	5 hr
Sep 1, 2:52 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Inyo	99 min
Sep 1, 2:57 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial, Riverside, San Bernardino	6 hr
Sep 1, 2:58 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Inyo, San Bernardino	4 hr
Sep 1, 3:16 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	4 hr
Sep 1, 3:17 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside	4 hr
Sep 1, 3:33 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Inyo	3 hr
Sep 1, 4:04 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	4 hr
Sep 1, 4:13 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Sep 1, 5:15 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside	3 hr
Sep 1, 5:30 PM PDT	Flash Flood Warning Considerable damage threat	EKA	Del Norte	4 hr
Sep 1, 5:59 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	76 min
Sep 1, 6:43 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Sep 1, 6:57 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Inyo, San Bernardino	9 hr
Sep 1, 8:36 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Inyo	7 hr
Sep 2, 11:29 AM PDT	Flash Flood Warning Considerable damage threat	VEF	Inyo, San Bernardino	4 hr
Sep 2, 12:43 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Imperial	3 hr
Sep 2, 1:06 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	2 hr
Sep 2, 1:16 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	4 hr
Sep 2, 1:42 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	3 hr
Sep 2, 2:40 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	50 min
Sep 2, 3:35 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Sep 2, 4:47 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	4 hr
Sep 2, 5:55 PM PDT	Flash Flood Warning	VEF	San Bernardino	3 hr
Sep 12, 3:29 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	2 hr
Sep 12, 5:07 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Sep 12, 8:23 PM PDT	Flash Flood Warning	VEF	San Bernardino	2 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 2022 2024

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.