Alert archive / California / Flash Flood Watches

Flash Flood Watches in California, 2021

41 flash flood watches in 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 watches reaches back to 2005.

Flash Flood Watches by county

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

Flash Flood Watches
41
Busiest month
July12 flash flood watches
Busiest day
July 29, 20214 flash flood watches

Over time

By month

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
Jan 4, 2:38 AM PSTFlash Flood WatchSTO15 hr
Jan 19, 9:51 AM PSTFlash Flood WatchPSRImperial, Riverside39 hr
Jan 19, 10:07 AM PSTFlash Flood WatchSGXRiverside, San Diego38 hr
Jan 24, 5:19 PM PSTFlash Flood WatchMTRMarin, Monterey, Napa, San Mateo, Santa Clara, Santa Cruz and 1 more4 days
Jan 25, 3:09 PM PSTFlash Flood WatchSTO3 days
Jan 26, 2:21 PM PSTFlash Flood WatchLOXLos Angeles62 hr
Jan 27, 10:58 AM PSTFlash Flood WatchSGXOrange, Riverside, San Bernardino, San Diego53 hr
Mar 10, 9:55 AM PSTFlash Flood WatchMTRMonterey, San Benito12 hr
Mar 10, 2:02 PM PSTFlash Flood WatchSGXOrange, Riverside, San Diego38 hr
Jul 12, 1:11 PM PDTFlash Flood WatchVEFSan Bernardino40 hr
Jul 18, 8:07 AM PDTFlash Flood WatchSGXRiverside, San Diego11 hr
Jul 19, 2:37 AM PDTFlash Flood WatchVEFInyo17 hr
Jul 23, 1:11 PM PDTFlash Flood WatchVEFSan Bernardino3 days
Jul 25, 12:19 PM PDTFlash Flood WatchVEFInyo32 hr
Jul 25, 6:53 PM PDTFlash Flood WatchSGXRiverside, San Bernardino, San Diego23 hr
Jul 26, 1:45 AM PDTFlash Flood WatchLOXLos Angeles17 hr
Jul 26, 10:14 AM PDTFlash Flood WatchREVAlpine, El Dorado, Mono, Nevada, Placer11 hr
Jul 29, 9:38 AM PDTFlash Flood WatchHNX58 hr
Jul 29, 12:09 PM PDTFlash Flood WatchREVAlpine, El Dorado, Mono, Nevada, Placer59 hr
Jul 29, 1:13 PM PDTFlash Flood WatchVEFInyo, San Bernardino55 hr
Jul 29, 1:26 PM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino40 hr
Aug 9, 1:34 PM PDTFlash Flood WatchSGXRiverside, San Bernardino, San Diego54 hr
Aug 30, 1:43 AM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino3 days
Aug 30, 2:38 AM PDTFlash Flood WatchSGXRiverside, San Bernardino, San Diego42 hr
Aug 30, 3:28 AM PDTFlash Flood WatchVEFSan Bernardino59 hr
Sep 16, 2:19 PM PDTFlash Flood WatchMFRSiskiyou49 hr
Sep 24, 8:56 AM PDTFlash Flood WatchSGXRiverside, San Diego10 hr
Sep 24, 9:03 AM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino10 hr
Oct 20, 11:30 AM PDTFlash Flood WatchREVLassen, Plumas, Sierra48 hr
Oct 20, 11:31 AM PDTFlash Flood WatchSTO47 hr
Oct 21, 12:45 PM PDTFlash Flood WatchHNXFresno, Kern, Madera, Mariposa, Tulare, Tuolumne4 days
Oct 21, 8:17 PM PDTFlash Flood WatchEKA10 hr
Oct 22, 10:48 AM PDTFlash Flood WatchMTRMarin, Monterey, Napa, San Mateo, Santa Clara, Santa Cruz and 1 more65 hr
Oct 22, 12:05 PM PDTFlash Flood WatchMFRSiskiyou59 hr
Oct 22, 1:09 PM PDTFlash Flood WatchSTO71 hr
Oct 24, 8:11 AM PDTFlash Flood WatchLOX28 hr
Nov 3, 12:41 PM PDTFlash Flood WatchEKA12 hr
Dec 12, 8:41 AM PSTFlash Flood WatchMTRMonterey, San Benito, San Mateo, Santa Clara, Santa Cruz40 hr
Dec 12, 12:02 PM PSTFlash Flood WatchLOXLos Angeles54 hr
Dec 29, 1:55 PM PSTFlash Flood WatchLOXLos Angeles26 hr
Dec 30, 4:07 PM PSTFlash Flood WatchLOXLos Angeles4 hr

By county

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

The busiest days

Days with the most alerts issued, by UTC date.

  1. July 29, 20214flash flood watches
  2. October 22, 20214flash flood watches
  3. July 26, 20213flash flood watches
  4. August 30, 20213flash flood watches
  5. January 19, 20212flash flood watches
  6. January 25, 20212flash flood watches
  7. March 10, 20212flash flood watches
  8. September 24, 20212flash flood watches
  9. October 20, 20212flash flood watches
  10. December 12, 20212flash flood watches
  11. January 4, 20211flash flood watches
  12. January 26, 20211flash flood watches

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. Rebuilt daily.