Areal Flood Warnings in California
431 areal flood warnings 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 areal flood warnings reaches back to 2005.
Areal Flood Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Areal Flood Warnings
- 431
- Busiest year
- 2023103 areal flood warnings
- Average year
- 23over 19 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.
- Sonoma County59
- Placer County31
- Santa Clara County30
- Monterey County28
- Nevada County28
- Imperial County27
- Plumas County26
- Sierra County25
- El Dorado County25
- Fresno County25
- Mendocino County25
- Riverside County25
- Tehama County23
- Tuolumne County22
- Lassen County22
- Yolo County22
- Humboldt County21
- Santa Cruz County21
- Butte County21
- San Bernardino County21
- Sacramento County21
- San Mateo County20
- Sutter County20
- Yuba County20
- Shasta County19
- Madera County19
- Glenn County19
- Colusa County18
- Solano County18
- San Joaquin County18
- San Benito County18
- Stanislaus County17
- Lake County16
- Amador County16
- Calaveras County15
- Tulare County15
- Siskiyou County15
- Marin County15
- Alpine County14
- Alameda County14
18 more counties
- Mariposa County12
- Mono County12
- Napa County12
- Kern County11
- Inyo County11
- San Diego County10
- Del Norte County9
- Kings County7
- Merced County7
- Contra Costa County6
- City and County of San Francisco6
- Trinity County6
- Orange County5
- Santa Barbara County5
- Modoc County4
- Ventura County4
- Los Angeles County4
- San Luis Obispo County3
The latest areal flood warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 6:26 PM PDT | Areal Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 17, 9:37 PM PDT | Areal Flood Warning | VEF | San Bernardino | 3 hr |
| Feb 24, 9:21 PM PST | Areal Flood Warning | EKA | Mendocino | 22 hr |
| Feb 24, 4:15 PM PST | Areal Flood Warning | EKA | Mendocino | 6 hr |
| Feb 24, 11:17 AM PST | Areal Flood Warning | EKA | Humboldt | 8 hr |
| Feb 24, 9:20 AM PST | Areal Flood Warning | EKA | Humboldt | 5 hr |
| Feb 24, 8:28 AM PST | Areal Flood Warning | EKA | Mendocino | 12 hr |
| Feb 24, 7:54 AM PST | Areal Flood Warning | EKA | Humboldt | 3 hr |
| Feb 24, 7:31 AM PST | Areal Flood Warning | EKA | Humboldt | 11 hr |
| Jan 5, 3:13 PM PST | Areal Flood Warning | MTR | Sonoma | 54 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.