Alert archive / California / Flood Watches
Flood Watches in California, 2021
14 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 flood watches reaches back to 2005.
Flood Watches by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Flood Watches
- 14
- Busiest month
- October5 flood watches
- Busiest day
- January 30, 20212 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 11, 1:24 PM PST | Flood Watch | EKA | Del Norte | 43 hr |
| Jan 29, 4:52 PM PST | Flood Watch | EKA | Del Norte, Humboldt, Mendocino, Trinity | 36 hr |
| Jan 29, 10:53 PM PST | Flood Watch | MFR | Siskiyou | 59 hr |
| Jan 31, 4:28 AM PST | Flood Watch | EKA | Del Norte, Humboldt, Mendocino, Trinity | 25 hr |
| Feb 1, 5:16 AM PST | Flood Watch | EKA | Del Norte, Humboldt, Trinity | 15 hr |
| Oct 21, 2:38 PM PDT | Flood Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 4 days |
| Oct 21, 2:41 PM PDT | Flood Watch | STO | 3 days | |
| Oct 22, 1:09 PM PDT | Flood Watch | STO | 58 hr | |
| Oct 22, 3:30 PM PDT | Flood Watch | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 53 hr |
| Oct 23, 4:46 AM PDT | Flood Watch | MFR | Siskiyou | 36 hr |
| Dec 13, 10:42 AM PST | Flood Watch | SGX | Orange, Riverside, San Bernardino, San Diego | 34 hr |
| Dec 13, 12:00 PM PST | Flood Watch | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 13 hr |
| Dec 22, 10:15 AM PST | Flood Watch | SGX | Orange, Riverside, San Bernardino, San Diego | 50 hr |
| Dec 28, 11:07 AM PST | Flood Watch | SGX | Orange, Riverside, San Bernardino, San Diego | 48 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Del Norte County5
- Humboldt County4
- Trinity County4
- Mendocino County3
- Orange County3
- Riverside County3
- San Bernardino County3
- San Diego County3
- Siskiyou County2
- Alpine County1
- El Dorado County1
- Lassen County1
- Mono County1
- Nevada County1
- Placer County1
- Plumas County1
- Sierra County1
- Lake County1
- Alameda County1
- Contra Costa County1
- Marin County1
- Monterey County1
- Napa County1
- San Benito County1
- City and County of San Francisco1
- San Mateo County1
- Santa Clara County1
- Santa Cruz County1
- Sonoma County1
The busiest days
Days with the most alerts issued, by UTC date.
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.