Alert archive / California / Flash Flood Warnings / 2021

Flash Flood Warnings in California, January 2021

16 flash flood warnings in January 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 January 2021. Tap one for its archive.

Flash Flood Warnings: 16
Busiest day: January 27, 20218 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
Jan 20, 10:11 AM PST	Flash Flood Warning Considerable damage threat	PSR	Imperial	6 hr
Jan 20, 11:29 AM PST	Flash Flood Warning Considerable damage threat	PSR	Imperial	6 hr
Jan 26, 9:39 PM PST	Flash Flood Warning Considerable damage threat	MTR	Sonoma	81 min
Jan 26, 10:56 PM PST	Flash Flood Warning Considerable damage threat	MTR	San Mateo, Santa Cruz	4 hr
Jan 27, 1:31 AM PST	Flash Flood Warning Considerable damage threat	MTR	Monterey	3 hr
Jan 27, 1:38 AM PST	Flash Flood Warning Considerable damage threat	MTR	Monterey	14 hr
Jan 27, 1:45 AM PST	Flash Flood Warning Considerable damage threat	MTR	Monterey	3 hr
Jan 27, 12:03 PM PST	Flash Flood Warning Considerable damage threat	MTR	Monterey	3 hr
Jan 27, 12:05 PM PST	Flash Flood Warning	MTR	Monterey	3 hr
Jan 27, 12:33 PM PST	Flash Flood Warning	MTR	San Mateo, Santa Cruz	6 hr
Jan 27, 4:19 PM PST	Flash Flood Warning Considerable damage threat	MTR	Monterey	5 hr
Jan 27, 7:02 PM PST	Flash Flood Warning Considerable damage threat	MTR	Monterey	3 hr
Jan 27, 7:05 PM PST	Flash Flood Warning Considerable damage threat	MTR	Monterey	3 hr
Jan 28, 12:02 AM PST	Flash Flood Warning	LOX	San Luis Obispo	4 hr
Jan 28, 1:34 AM PST	Flash Flood Warning	LOX	San Luis Obispo	56 min
Jan 28, 3:01 AM PST	Flash Flood Warning	LOX	San Luis Obispo	104 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 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. Warning verification from the Mesonet's Cow. Rebuilt daily.