Alert archive / California / Flood Watches

Flood Watches in California, 2025

78 flood watches in 2025. 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 flood watches reaches back to 2005.

Flood Watches by county

Each county as a circle sized by its count in 2025. Tap one for its archive.

Flood Watches
78
Busiest month
December15 flood watches
Busiest day
December 19, 20256 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 24, 1:00 PM PSTFlood WatchLOXLos Angeles, Ventura69 hr
Jan 30, 12:01 PM PSTFlood WatchSTO3 days
Jan 30, 12:11 PM PSTFlood WatchHNXMadera, Mariposa, Merced56 hr
Jan 30, 9:17 PM PSTFlood WatchMTRAlameda, Contra Costa, Marin, Napa, City and County of San Francisco, San Mateo and 3 more65 hr
Jan 31, 1:57 PM PSTFlood WatchREVAlpine, El Dorado, Lassen, Nevada, Placer, Plumas and 1 more46 hr
Feb 2, 12:16 PM PSTFlood WatchHNXMadera, Mariposa, Merced65 hr
Feb 3, 12:44 AM PSTFlood WatchMTRAlameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more43 hr
Feb 3, 1:48 AM PSTFlood WatchSTO49 hr
Feb 3, 4:23 AM PSTFlood WatchEKAHumboldt5 hr
Feb 3, 9:31 PM PSTFlood WatchEKALake22 hr
Feb 5, 12:36 PM PSTFlood WatchMTRMarin, Napa, Sonoma41 hr
Feb 10, 12:34 PM PSTFlood WatchHNXFresno, Kern, Madera, Mariposa, Merced, Tulare4 days
Feb 10, 1:49 PM PSTFlood WatchSGXOrange, Riverside, San Bernardino, San Diego4 days
Feb 11, 9:35 AM PSTFlood WatchMTRAlameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more63 hr
Feb 11, 11:16 AM PSTFlood WatchLOXSan Luis Obispo55 hr
Feb 11, 11:26 AM PSTFlood WatchSTO67 hr
Feb 11, 1:42 PM PSTFlood WatchEKALake, Mendocino50 hr
Feb 12, 2:39 AM PSTFlood WatchVEF44 hr
Feb 22, 3:20 PM PSTFlood WatchEKADel Norte, Humboldt31 hr
Mar 10, 12:33 PM PDTFlood WatchLOXLos Angeles, Santa Barbara, Ventura3 days
Mar 10, 1:28 PM PDTFlood WatchSGXOrange, Riverside, San Bernardino, San Diego3 days
Mar 14, 9:55 AM PDTFlood WatchMFRSiskiyou59 hr
Mar 14, 10:46 AM PDTFlood WatchEKADel Norte, Humboldt55 hr
Jun 3, 9:26 AM PDTFlood WatchVEFSan Bernardino34 hr
Aug 23, 8:42 AM PDTFlood WatchREVMono12 hr
Aug 24, 2:50 AM PDTFlood WatchREVAlpine, El Dorado, Mono, Nevada, Placer18 hr
Aug 24, 9:19 AM PDTFlood WatchHNXFresno, Madera, Mariposa, Tulare, Tuolumne12 hr
Aug 25, 1:01 AM PDTFlood WatchREVAlpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more20 hr
Aug 25, 2:00 AM PDTFlood WatchPSRImperial, Riverside19 hr
Aug 25, 9:11 AM PDTFlood WatchHNXFresno, Kern, Madera, Mariposa, Tulare, Tuolumne14 hr
Aug 26, 1:48 AM PDTFlood WatchREVAlpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more19 hr
Aug 26, 1:53 AM PDTFlood WatchVEFInyo19 hr
Aug 26, 7:17 AM PDTFlood WatchHNXFresno, Kern, Madera, Mariposa, Tulare, Tuolumne14 hr
Aug 27, 12:45 AM PDTFlood WatchREVAlpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more21 hr
Sep 1, 12:11 PM PDTFlood WatchHNXFresno, Kern, Tulare50 hr
Sep 1, 12:24 PM PDTFlood WatchLOXLos Angeles50 hr
Sep 2, 2:19 AM PDTFlood WatchVEFInyo, San Bernardino17 hr
Sep 2, 11:04 AM PDTFlood WatchREVMono9 hr
Sep 3, 1:30 PM PDTFlood WatchPSRImperial, Riverside35 hr
Sep 17, 12:17 PM PDTFlood WatchSGXRiverside, San Bernardino, San Diego38 hr
Sep 17, 12:22 PM PDTFlood WatchHNXFresno, Kern, Kings, Madera, Mariposa, Merced and 2 more52 hr
Sep 17, 12:25 PM PDTFlood WatchVEFSan Bernardino38 hr
Sep 17, 12:31 PM PDTFlood WatchLOXLos Angeles, San Luis Obispo, Santa Barbara, Ventura32 hr
Sep 17, 12:39 PM PDTFlood WatchPSRImperial, Riverside, San Bernardino34 hr
Sep 25, 10:31 AM PDTFlood WatchREVMono9 hr
Sep 26, 12:03 PM PDTFlood WatchSGXRiverside, San Bernardino, San Diego31 hr
Sep 27, 1:38 AM PDTFlood WatchPSRImperial, Riverside, San Bernardino16 hr
Oct 8, 1:07 PM PDTFlood WatchVEFSan Bernardino4 days
Oct 8, 1:37 PM PDTFlood WatchPSRImperial, Riverside, San Bernardino5 days
Oct 12, 12:20 PM PDTFlood WatchLOXLos Angeles, San Luis Obispo, Santa Barbara, Ventura49 hr
Oct 12, 2:17 PM PDTFlood WatchHNXFresno, Kern, Madera, Mariposa, Tulare51 hr
Nov 3, 12:21 PM PSTFlood WatchEKADel Norte, Humboldt, Lake, Mendocino, Trinity48 hr
Nov 12, 11:00 AM PSTFlood WatchHNXFresno, Kern, Madera, Mariposa, Merced, Tulare3 days
Nov 12, 12:07 PM PSTFlood WatchEKALake, Mendocino22 hr
Nov 13, 9:30 AM PSTFlood WatchLOXSanta Barbara, Ventura25 hr
Nov 13, 11:37 AM PSTFlood WatchVEFInyo, San Bernardino58 hr
Nov 13, 11:49 AM PSTFlood WatchSGXOrange, Riverside, San Bernardino, San Diego58 hr
Nov 13, 11:50 AM PSTFlood WatchPSRRiverside, San Bernardino56 hr
Nov 13, 12:19 PM PSTFlood WatchLOXLos Angeles, Santa Barbara, Ventura56 hr
Nov 15, 9:45 PM PSTFlood WatchHNXFresno, Kern, Madera, Mariposa, Merced, Tulare46 hr
Nov 17, 12:26 PM PSTFlood WatchVEFInyo, San Bernardino40 hr
Nov 20, 12:12 PM PSTFlood WatchPSRImperial, Riverside, San Bernardino28 hr
Nov 20, 2:27 PM PSTFlood WatchLOXLos Angeles, Ventura17 hr
Dec 18, 11:18 AM PSTFlood WatchEKADel Norte, Humboldt26 hr
Dec 19, 8:24 AM PSTFlood WatchSTO7 days
Dec 19, 8:39 AM PSTFlood WatchHNXFresno, Madera, Mariposa, Tuolumne7 days
Dec 19, 11:25 AM PSTFlood WatchEKADel Norte, Humboldt, Lake, Mendocino, Trinity63 hr
Dec 19, 12:59 PM PSTFlood WatchREVAlpine, El Dorado, Lassen, Nevada, Placer, Plumas and 1 more3 days
Dec 19, 1:29 PM PSTFlood WatchHNXFresno, Kern, Kings, Madera, Mariposa, Merced and 1 more7 days
Dec 19, 2:18 PM PSTFlood WatchMTRAlameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more7 days
Dec 21, 2:30 AM PSTFlood WatchMFRModoc, Siskiyou20 hr
Dec 21, 11:47 AM PSTFlood WatchSGXOrange, Riverside, San Bernardino, San Diego4 days
Dec 21, 11:51 AM PSTFlood WatchLOXLos Angeles, San Luis Obispo, Santa Barbara, Ventura5 days
Dec 21, 11:14 PM PSTFlood WatchVEFInyo, San Bernardino3 days
Dec 22, 7:44 AM PSTFlood WatchEKADel Norte, Humboldt, Lake, Mendocino, Trinity4 days
Dec 23, 1:10 AM PSTFlood WatchREVLassen, Plumas, Sierra39 hr
Dec 23, 11:23 AM PSTFlood WatchPSRSan Bernardino33 hr
Dec 25, 9:53 AM PSTFlood WatchSGXRiverside, San Bernardino30 hr

By county

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

4 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. December 19, 20256flood watches
  2. September 17, 20255flood watches
  3. November 13, 20255flood watches
  4. February 11, 20254flood watches
  5. February 3, 20253flood watches
  6. August 25, 20253flood watches
  7. August 26, 20253flood watches
  8. December 21, 20253flood watches
  9. January 30, 20252flood watches
  10. January 31, 20252flood watches
  11. February 10, 20252flood watches
  12. March 10, 20252flood watches

Nearby

Alerts in force nowTornadoes on recordThe radar archive20242026

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.