Areal Flood Advisories in California
5,533 areal flood advisories 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 advisories reaches back to 2005.
Areal Flood Advisories by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Areal Flood Advisories
- 5,533
- Busiest year
- 2025652 areal flood advisories
- Average year
- 291over 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.
- San Bernardino County1,121
- Riverside County777
- San Diego County496
- Los Angeles County471
- Fresno County341
- Kern County321
- Santa Barbara County312
- Ventura County309
- Tulare County239
- Santa Clara County235
- Madera County226
- Orange County218
- San Luis Obispo County216
- Inyo County208
- Santa Cruz County208
- Imperial County200
- San Mateo County199
- Sonoma County190
- Monterey County181
- Mariposa County170
- Alameda County163
- Placer County153
- Marin County153
- Humboldt County153
- Kings County137
- Tuolumne County135
- Nevada County132
- Contra Costa County129
- City and County of San Francisco126
- El Dorado County122
- Merced County112
- Napa County111
- San Benito County111
- Sacramento County106
- Butte County96
- San Joaquin County95
- Mendocino County95
- Yuba County94
- Mono County91
- Yolo County90
The latest areal flood advisories
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 28, 10:15 PM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 3 hr |
| Sep 28, 9:54 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 4 hr |
| Sep 28, 9:16 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Sep 28, 5:34 PM PDT | Areal Flood Advisory | LOX | Los Angeles | 74 min |
| Sep 24, 5:02 PM PDT | Areal Flood Advisory | SGX | Riverside | 51 min |
| Sep 24, 3:31 PM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 2 hr |
| Sep 24, 3:02 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 118 min |
| Sep 24, 2:38 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Sep 24, 2:13 PM PDT | Areal Flood Advisory | SGX | Riverside | 2 hr |
| Sep 24, 1:08 PM PDT | Areal Flood Advisory | SGX | San Diego | 115 min |
| Sep 24, 12:45 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 113 min |
| Sep 24, 12:39 PM PDT | Areal Flood Advisory | SGX | San Diego | 116 min |
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.