Alert archive / California / Areal Flood Warnings
Areal Flood Warnings in California, 2017
97 areal flood warnings in 2017. 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 in 2017. Tap one for its archive.
- Areal Flood Warnings
- 97
- Busiest month
- January48 areal flood warnings
- Busiest day
- February 21, 201710 areal flood warnings
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 3, 5:31 PM PST | Areal Flood Warning | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 6 hr |
| Jan 5, 4:12 PM PST | Areal Flood Warning | HNX | Kern | 6 hr |
| Jan 8, 6:22 AM PST | Areal Flood Warning | STO | Alpine, Amador, Butte, Calaveras, El Dorado, Glenn and 12 more | 48 hr |
| Jan 8, 9:13 AM PST | Areal Flood Warning | STO | Amador, Butte, Calaveras, Colusa, Glenn, Lake and 10 more | 48 hr |
| Jan 8, 9:18 AM PST | Areal Flood Warning | MFR | Siskiyou | 6 hr |
| Jan 8, 11:44 AM PST | Areal Flood Warning | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 6 hr |
| Jan 8, 4:55 PM PST | Areal Flood Warning | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 9 hr |
| Jan 8, 7:54 PM PST | Areal Flood Warning | MTR | Santa Clara | 3 hr |
| Jan 8, 9:10 PM PST | Areal Flood Warning | MFR | Modoc | 6 hr |
| Jan 8, 10:45 PM PST | Areal Flood Warning | MTR | Santa Clara | 6 hr |
| Jan 9, 1:29 AM PST | Areal Flood Warning | REV | Alpine, El Dorado, Mono, Nevada, Placer | 12 hr |
| Jan 9, 1:45 AM PST | Areal Flood Warning | REV | Lassen, Mono, Nevada, Plumas, Sierra | 12 hr |
| Jan 9, 9:08 AM PST | Areal Flood Warning | HNX | Fresno, Madera | 6 hr |
| Jan 9, 2:54 PM PST | Areal Flood Warning | HNX | Fresno, Madera | 6 hr |
| Jan 9, 9:00 PM PST | Areal Flood Warning | HNX | Fresno, Madera | 9 hr |
| Jan 10, 3:10 AM PST | Areal Flood Warning | STO | Amador, Butte, Calaveras, Colusa, El Dorado, Glenn and 15 more | 60 hr |
| Jan 10, 10:56 AM PST | Areal Flood Warning | MTR | Sonoma | 48 hr |
| Jan 10, 11:29 AM PST | Areal Flood Warning | MTR | Monterey, Santa Cruz | 48 hr |
| Jan 10, 2:51 PM PST | Areal Flood Warning | MTR | Santa Clara | 36 hr |
| Jan 10, 4:26 PM PST | Areal Flood Warning | MTR | Sonoma | 24 hr |
| Jan 10, 6:18 PM PST | Areal Flood Warning | MTR | Sonoma | 12 hr |
| Jan 10, 6:41 PM PST | Areal Flood Warning | MTR | Santa Clara | 15 hr |
| Jan 10, 7:59 PM PST | Areal Flood Warning | MTR | Napa | 12 hr |
| Jan 10, 8:28 PM PST | Areal Flood Warning | MTR | Marin | 12 hr |
| Jan 11, 7:43 AM PST | Areal Flood Warning | MTR | San Benito, Santa Clara | 12 hr |
| Jan 11, 4:29 PM PST | Areal Flood Warning | MTR | Sonoma | 12 hr |
| Jan 12, 10:11 AM PST | Areal Flood Warning | MTR | Monterey | 18 hr |
| Jan 12, 10:24 AM PST | Areal Flood Warning | MTR | Monterey, Santa Cruz | 12 hr |
| Jan 12, 10:28 AM PST | Areal Flood Warning | MTR | Sonoma | 24 hr |
| Jan 12, 2:01 PM PST | Areal Flood Warning | HNX | Merced | 24 hr |
| Jan 12, 2:31 PM PST | Areal Flood Warning | STO | Amador, Butte, Calaveras, Colusa, El Dorado, Glenn and 13 more | 24 hr |
| Jan 13, 11:45 AM PST | Areal Flood Warning | MTR | Contra Costa | 24 hr |
| Jan 13, 2:31 PM PST | Areal Flood Warning | STO | Sacramento, San Joaquin, Solano, Stanislaus, Yolo | 24 hr |
| Jan 14, 1:55 PM PST | Areal Flood Warning | STO | Sacramento, San Joaquin, Solano, Stanislaus, Yolo | 36 hr |
| Jan 14, 2:08 PM PST | Areal Flood Warning | STO | Sacramento, San Joaquin, Solano, Stanislaus, Yolo | 36 hr |
| Jan 20, 7:31 AM PST | Areal Flood Warning | MTR | Santa Cruz | 12 hr |
| Jan 20, 7:55 AM PST | Areal Flood Warning | MTR | Sonoma | 18 hr |
| Jan 20, 3:56 PM PST | Areal Flood Warning | MTR | San Benito, Santa Clara | 72 hr |
| Jan 21, 8:46 AM PST | Areal Flood Warning | MTR | Monterey | 16 hr |
| Jan 22, 12:45 AM PST | Areal Flood Warning | MTR | Monterey | 6 hr |
| Jan 22, 1:47 AM PST | Areal Flood Warning | MTR | Sonoma | 6 hr |
| Jan 22, 7:32 AM PST | Areal Flood Warning | MTR | Sonoma | 24 hr |
| Jan 22, 11:34 AM PST | Areal Flood Warning | MTR | Santa Cruz | 24 hr |
| Jan 22, 5:35 PM PST | Areal Flood Warning | SGX | Orange, Riverside, San Bernardino | 3 hr |
| Jan 22, 7:06 PM PST | Areal Flood Warning | SGX | San Diego | 3 hr |
| Jan 22, 8:35 PM PST | Areal Flood Warning | SGX | Orange, Riverside, San Bernardino | 5 hr |
| Jan 23, 7:15 AM PST | Areal Flood Warning | MTR | San Benito | 3 hr |
| Jan 23, 7:29 AM PST | Areal Flood Warning | MTR | Sonoma | 24 hr |
| Feb 3, 2:42 PM PST | Areal Flood Warning | HNX | Fresno, Madera | 3 hr |
| Feb 6, 9:04 PM PST | Areal Flood Warning | REV | Lassen, Plumas, Sierra | 24 hr |
| Feb 7, 12:21 AM PST | Areal Flood Warning | MTR | Sonoma | 32 hr |
| Feb 7, 1:03 AM PST | Areal Flood Warning | MTR | Sonoma | 11 hr |
| Feb 7, 1:47 AM PST | Areal Flood Warning | MTR | Napa | 6 hr |
| Feb 7, 4:20 AM PST | Areal Flood Warning | STO | Amador, Butte, Calaveras, Colusa, El Dorado, Glenn and 15 more | 36 hr |
| Feb 7, 6:51 AM PST | Areal Flood Warning | REV | Alpine, El Dorado, Nevada, Placer | 12 hr |
| Feb 7, 9:26 AM PST | Areal Flood Warning | STO | Alpine, Amador, Butte, Calaveras, Colusa, El Dorado and 17 more | 6 days |
| Feb 7, 10:26 AM PST | Areal Flood Warning | MTR | San Mateo | 11 hr |
| Feb 7, 5:13 PM PST | Areal Flood Warning | MTR | Monterey | 6 hr |
| Feb 7, 5:45 PM PST | Areal Flood Warning | HNX | Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne | 12 hr |
| Feb 7, 9:14 PM PST | Areal Flood Warning | REV | Lassen | 6 days |
| Feb 8, 8:37 AM PST | Areal Flood Warning | MTR | Sonoma | 4 days |
| Feb 8, 10:24 AM PST | Areal Flood Warning | REV | Alpine, El Dorado, Lassen, Nevada, Placer, Plumas and 1 more | 21 hr |
| Feb 9, 9:54 AM PST | Areal Flood Warning | REV | Lassen, Plumas, Sierra | 12 hr |
| Feb 9, 11:31 AM PST | Areal Flood Warning | MFR | Siskiyou | 9 hr |
| Feb 9, 12:27 PM PST | Areal Flood Warning | REV | Alpine, El Dorado, Nevada, Placer | 57 hr |
| Feb 9, 9:18 PM PST | Areal Flood Warning | REV | Plumas, Sierra | 60 hr |
| Feb 9, 10:47 PM PST | Areal Flood Warning | HNX | Madera, Mariposa, Tuolumne | 12 hr |
| Feb 10, 10:56 AM PST | Areal Flood Warning | HNX | Madera, Mariposa, Tuolumne | 9 hr |
| Feb 11, 6:52 AM PST | Areal Flood Warning | HNX | Fresno, Madera | 24 hr |
| Feb 12, 6:43 AM PST | Areal Flood Warning | HNX | Fresno, Madera | 48 hr |
| Feb 14, 6:39 AM PST | Areal Flood Warning | HNX | Fresno, Madera | 72 hr |
| Feb 17, 10:15 PM PST | Areal Flood Warning | SGX | Riverside, San Bernardino | 9 hr |
| Feb 18, 11:12 AM PST | Areal Flood Warning | STO | Butte, Colusa, Glenn, Sutter, Tehama | 24 hr |
| Feb 18, 3:58 PM PST | Areal Flood Warning | STO | Alpine, Amador, Butte, Calaveras, Colusa, El Dorado and 17 more | 5 days |
| Feb 20, 8:22 AM PST | Areal Flood Warning | MTR | Sonoma | 60 hr |
| Feb 20, 11:27 AM PST | Areal Flood Warning | REV | Alpine, Lassen, Plumas, Sierra | 24 hr |
| Feb 20, 3:23 PM PST | Areal Flood Warning | MTR | Santa Clara | 6 hr |
| Feb 20, 8:26 PM PST | Areal Flood Warning | REV | Lassen, Plumas | 15 hr |
| Feb 20, 9:15 PM PST | Areal Flood Warning | MTR | Santa Clara | 8 hr |
| Feb 20, 10:16 PM PST | Areal Flood Warning | MTR | San Benito, Santa Clara | 12 hr |
| Feb 20, 10:42 PM PST | Areal Flood Warning | MTR | Alameda | 12 hr |
| Feb 20, 11:38 PM PST | Areal Flood Warning | MTR | Santa Clara | 12 hr |
| Feb 21, 12:14 AM PST | Areal Flood Warning | MTR | Monterey | 12 hr |
| Feb 21, 1:09 AM PST | Areal Flood Warning | MTR | San Mateo | 6 hr |
| Feb 21, 5:38 AM PST | Areal Flood Warning | MTR | San Benito, Santa Clara | 15 hr |
| Feb 21, 11:29 AM PST | Areal Flood Warning | MTR | Santa Clara | 36 hr |
| Feb 21, 11:52 AM PST | Areal Flood Warning | REV | Lassen | 5 days |
| Feb 22, 8:16 PM PST | Areal Flood Warning | MTR | Sonoma | 12 hr |
| Feb 23, 1:20 PM PST | Areal Flood Warning | MTR | Monterey | 9 hr |
| Feb 27, 3:27 PM PST | Areal Flood Warning | SGX | Riverside, San Diego | 6 hr |
| Feb 27, 3:55 PM PST | Areal Flood Warning | SGX | Riverside, San Diego | 8 hr |
| Apr 21, 9:31 AM PDT | Areal Flood Warning | REV | Placer | 6 days |
| May 19, 1:34 PM PDT | Areal Flood Warning | REV | Mono | 7 days |
| Jun 4, 1:13 PM PDT | Areal Flood Warning | REV | Mono | 5 days |
| Jun 20, 12:42 PM PDT | Areal Flood Warning | REV | Mono | 7 days |
| Jun 23, 2:03 PM PDT | Areal Flood Warning | HNX | Fresno, Kings, Tulare | 6 days |
| Jun 28, 12:48 PM PDT | Areal Flood Warning | REV | Mono | 16 days |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Sonoma County15
- Placer County14
- Plumas County14
- Sierra County14
- Santa Clara County13
- Lassen County13
- Nevada County13
- El Dorado County12
- Alpine County10
- Sacramento County10
- Stanislaus County10
- Madera County10
- Monterey County9
- Tuolumne County9
- San Joaquin County9
- Solano County9
- Yolo County9
- Fresno County9
- Butte County8
- Glenn County8
- Sutter County8
- Tehama County8
- Mono County8
- Amador County7
- Calaveras County7
- Yuba County7
- Colusa County7
- San Benito County6
- Shasta County6
- Lake County6
- Santa Cruz County5
- Riverside County5
- Napa County3
- San Mateo County3
- San Bernardino County3
- San Diego County3
- Mariposa County3
- Alameda County2
- Contra Costa County2
- Marin County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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.