Alert archive / California / Flash Flood Watches

Flash Flood Watches in California, 2018

44 flash flood watches in 2018. 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 2018. Tap one for its archive.

Flash Flood Watches
44
Busiest month
November8 flash flood watches
Busiest day
January 7, 20184 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 6, 9:40 PM PSTFlash Flood WatchLOXLos Angeles70 hr
Jan 6, 10:09 PM PSTFlash Flood WatchSGXOrange, Riverside, San Bernardino, San Diego70 hr
Jan 7, 4:06 AM PSTFlash Flood WatchMTRMarin, Napa, Sonoma45 hr
Jan 7, 9:18 AM PSTFlash Flood WatchHNX55 hr
Jan 8, 8:07 AM PSTFlash Flood WatchSTO19 hr
Jan 8, 1:11 PM PSTFlash Flood WatchVEFInyo27 hr
Feb 28, 2:45 PM PSTFlash Flood WatchLOX48 hr
Mar 12, 2:14 PM PDTFlash Flood WatchLOX20 hr
Mar 19, 9:56 AM PDTFlash Flood WatchHNX3 days
Mar 19, 2:55 PM PDTFlash Flood WatchSGXOrange, Riverside, San Bernardino, San Diego4 days
Mar 19, 3:23 PM PDTFlash Flood WatchLOXLos Angeles3 days
Mar 22, 8:47 AM PDTFlash Flood WatchSTO14 hr
Mar 22, 8:13 PM PDTFlash Flood WatchHNX3 hr
Mar 23, 1:02 PM PDTFlash Flood WatchSTO22 hr
May 23, 10:49 AM PDTFlash Flood WatchREVMono5 hr
Jul 11, 11:14 AM PDTFlash Flood WatchSGXRiverside, San Bernardino, San Diego8 hr
Jul 11, 11:41 AM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino14 hr
Jul 11, 11:45 AM PDTFlash Flood WatchVEFInyo, San Bernardino10 hr
Jul 12, 2:51 AM PDTFlash Flood WatchVEFInyo21 hr
Jul 22, 8:13 AM PDTFlash Flood WatchREVAlpine, El Dorado, Mono, Nevada, Placer13 hr
Jul 23, 3:10 AM PDTFlash Flood WatchREVAlpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more18 hr
Jul 24, 9:37 AM PDTFlash Flood WatchREVAlpine, El Dorado, Mono, Nevada, Placer10 hr
Aug 15, 7:25 PM PDTFlash Flood WatchSGXRiverside, San Bernardino, San Diego25 hr
Aug 16, 9:17 AM PDTFlash Flood WatchVEFSan Bernardino10 hr
Aug 16, 11:03 AM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino9 hr
Sep 28, 2:01 PM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino5 days
Sep 28, 2:20 PM PDTFlash Flood WatchVEFInyo, San Bernardino4 days
Oct 1, 3:00 AM PDTFlash Flood WatchSGXRiverside, San Bernardino, San Diego16 hr
Oct 3, 9:31 AM PDTFlash Flood WatchSTO9 hr
Oct 3, 9:54 AM PDTFlash Flood WatchEKAMendocino9 hr
Oct 3, 11:35 AM PDTFlash Flood WatchHNX12 hr
Oct 13, 2:37 AM PDTFlash Flood WatchVEFSan Bernardino12 hr
Oct 13, 2:52 AM PDTFlash Flood WatchPSRImperial, Riverside25 hr
Nov 19, 12:41 PM PSTFlash Flood WatchSTO4 days
Nov 19, 1:03 PM PSTFlash Flood WatchEKAMendocino4 days
Nov 20, 2:00 PM PSTFlash Flood WatchMFRSiskiyou70 hr
Nov 20, 3:34 PM PSTFlash Flood WatchHNX40 hr
Nov 27, 12:47 PM PSTFlash Flood WatchSGXOrange, Riverside, San Bernardino, San Diego61 hr
Nov 27, 1:39 PM PSTFlash Flood WatchSTO56 hr
Nov 27, 1:50 PM PSTFlash Flood WatchHNX62 hr
Nov 27, 2:04 PM PSTFlash Flood WatchEKAMendocino50 hr
Dec 6, 9:11 AM PSTFlash Flood WatchSGXOrange, Riverside, San Bernardino, San Diego15 hr
Dec 24, 2:00 AM PSTFlash Flood WatchSTO16 hr
Dec 24, 2:08 AM PSTFlash Flood WatchEKAMendocino16 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. January 7, 20184flash flood watches
  2. November 27, 20184flash flood watches
  3. March 19, 20183flash flood watches
  4. July 11, 20183flash flood watches
  5. August 16, 20183flash flood watches
  6. October 3, 20183flash flood watches
  7. January 8, 20182flash flood watches
  8. March 23, 20182flash flood watches
  9. September 28, 20182flash flood watches
  10. October 13, 20182flash flood watches
  11. November 19, 20182flash flood watches
  12. November 20, 20182flash flood watches

Nearby

Alerts in force nowTornadoes on recordThe radar archive20172019

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.