Alert archive / California / Flash Flood Watches

Flash Flood Watches in California, 2020

21 flash flood watches in 2020. 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 2020. Tap one for its archive.

Flash Flood Watches
21
Busiest month
March5 flash flood watches
Busiest day
March 11, 20203 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
Mar 9, 12:31 PM PDTFlash Flood WatchHNX53 hr
Mar 9, 2:44 PM PDTFlash Flood WatchVEFInyo, San Bernardino37 hr
Mar 11, 3:30 AM PDTFlash Flood WatchVEFSan Bernardino48 hr
Mar 11, 3:59 AM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino64 hr
Mar 11, 1:23 PM PDTFlash Flood WatchSGXRiverside, San Bernardino, San Diego44 hr
Apr 6, 1:02 PM PDTFlash Flood WatchSGXOrange, Riverside, San Bernardino, San Diego4 days
Apr 6, 1:02 PM PDTFlash Flood WatchVEFInyo, San Bernardino56 hr
Apr 6, 1:22 PM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino53 hr
Apr 8, 5:48 AM PDTFlash Flood WatchHNX17 hr
May 17, 1:29 PM PDTFlash Flood WatchSTO32 hr
May 29, 10:43 AM PDTFlash Flood WatchSTO33 hr
May 29, 11:19 AM PDTFlash Flood WatchEKAHumboldt, Mendocino, Trinity28 hr
Jun 25, 3:32 AM PDTFlash Flood WatchREVMono16 hr
Aug 16, 2:33 AM PDTFlash Flood WatchLOXSanta Barbara17 hr
Aug 16, 3:40 AM PDTFlash Flood WatchHNX17 hr
Aug 18, 12:30 PM PDTFlash Flood WatchHNX7 hr
Aug 21, 2:04 PM PDTFlash Flood WatchLOXSanta Barbara29 hr
Aug 22, 2:15 PM PDTFlash Flood WatchLOXSanta Barbara29 hr
Nov 6, 1:12 PM PSTFlash Flood WatchSGXRiverside, San Bernardino31 hr
Nov 16, 2:47 PM PSTFlash Flood WatchSTO37 hr
Nov 17, 10:01 AM PSTFlash Flood WatchREVLassen, Plumas, Sierra18 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. March 11, 20203flash flood watches
  2. April 6, 20203flash flood watches
  3. March 9, 20202flash flood watches
  4. May 29, 20202flash flood watches
  5. August 16, 20202flash flood watches
  6. April 8, 20201flash flood watches
  7. May 17, 20201flash flood watches
  8. June 25, 20201flash flood watches
  9. August 18, 20201flash flood watches
  10. August 21, 20201flash flood watches
  11. August 22, 20201flash flood watches
  12. November 6, 20201flash flood watches

Nearby

Alerts in force nowTornadoes on recordThe radar archive20192021

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.