Alert archive / California / Flash Flood Warnings / 2024

Flash Flood Warnings in California, September 2024

15 flash flood warnings in September 2024. 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 2024. Tap one for its archive.

Flash Flood Warnings: 15
Busiest day: September 8, 20247 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
Sep 7, 2:58 PM PDT	Flash Flood Warning Considerable damage threat	VEF	San Bernardino	3 hr
Sep 8, 1:40 PM PDT	Flash Flood Warning Considerable damage threat	SGX	San Bernardino	3 hr
Sep 8, 2:13 PM PDT	Flash Flood Warning Considerable damage threat	SGX	San Bernardino	3 hr
Sep 8, 2:43 PM PDT	Flash Flood Warning Considerable damage threat	SGX	San Bernardino	3 hr
Sep 8, 2:54 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside, San Bernardino	3 hr
Sep 8, 3:01 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside	3 hr
Sep 8, 3:28 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside, San Bernardino	3 hr
Sep 8, 3:54 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside	3 hr
Sep 8, 5:08 PM PDT	Flash Flood Warning Considerable damage threat	SGX	Riverside	3 hr
Sep 15, 8:48 PM PDT	Flash Flood Warning Considerable damage threat	STO	Butte, Tehama	5 hr
Sep 18, 6:37 PM PDT	Flash Flood Warning Considerable damage threat	STO	Butte, Tehama	4 hr
Sep 19, 4:10 PM PDT	Flash Flood Warning Considerable damage threat	LOX	San Luis Obispo, Santa Barbara	3 hr
Sep 19, 7:05 PM PDT	Flash Flood Warning	LOX	San Luis Obispo, Santa Barbara	60 min
Sep 20, 2:15 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside	3 hr
Sep 20, 2:17 PM PDT	Flash Flood Warning Considerable damage threat	SGX	San Bernardino	64 min

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 2023 2025

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.