Flood Watches in California
435 flood watches since 1986. 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 since 1986. Tap one for its archive.
- Flood Watches
- 435
- Busiest year
- 202378 flood watches
- Average year
- 21over 21 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Bernardino County82
- Riverside County60
- Humboldt County49
- Mono County40
- Siskiyou County39
- Del Norte County39
- Mendocino County39
- El Dorado County38
- Nevada County38
- Placer County38
- San Diego County38
- Alpine County37
- Lassen County33
- Plumas County33
- Sierra County33
- Trinity County31
- Kern County30
- Fresno County29
- Tulare County28
- Madera County27
- Mariposa County27
- Marin County26
- Napa County26
- Sonoma County26
- Los Angeles County26
- Lake County26
- Santa Barbara County24
- Orange County23
- Ventura County23
- Merced County21
- Monterey County20
- San Mateo County19
- Santa Clara County19
- Santa Cruz County19
- Alameda County17
- Contra Costa County17
- San Benito County17
- City and County of San Francisco17
- Inyo County16
- Imperial County16
The latest flood watches
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 12:58 PM PDT | Flood Watch | HNX | Kern | 2 min |
| Aug 11, 9:34 AM PDT | Flood Watch | REV | Mono | 59 hr |
| Jul 20, 12:17 PM PDT | Flood Watch | REV | Alpine, El Dorado, Mono, Nevada, Placer | 34 hr |
| Jul 19, 11:41 AM PDT | Flood Watch | REV | Mono | 35 hr |
| Feb 23, 9:33 AM PST | Flood Watch | MFR | Siskiyou | 36 hr |
| Feb 22, 9:26 AM PST | Flood Watch | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 61 hr |
| Feb 17, 2:42 AM PST | Flood Watch | LOX | Los Angeles, San Luis Obispo, Santa Barbara, Ventura | 27 hr |
| Feb 14, 12:20 PM PST | Flood Watch | LOX | Los Angeles, Santa Barbara, Ventura | 60 hr |
| Jan 2, 9:44 AM PST | Flood Watch | HNX | Fresno, Kern, Madera, Mariposa, Merced, Tulare | 64 hr |
| Jan 2, 9:25 AM PST | Flood Watch | STO | 3 days | |
| Dec 31, 7:48 PM PST | Flood Watch | REV | Lassen, Plumas, Sierra | 68 hr |
Nearby
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.