Alert archive / California / Winter Storm Watches
Winter Storm Watches in California, 2021
79 winter storm 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 winter storm watches reaches back to 2005.
Winter Storm Watches by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Winter Storm Watches
- 79
- Busiest month
- December36 winter storm watches
- Busiest day
- January 23, 20215 winter storm 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 2, 3:00 AM PST | Winter Storm Watch | MFR | Siskiyou | 11 hr |
| Jan 2, 2:08 PM PST | Winter Storm Watch | EKA | 14 hr | |
| Jan 22, 12:12 PM PST | Winter Storm Watch | SGX | Riverside, San Bernardino, San Diego | 46 hr |
| Jan 22, 1:37 PM PST | Winter Storm Watch | HNX | 24 hr | |
| Jan 22, 2:25 PM PST | Winter Storm Watch | LOX | 43 hr | |
| Jan 22, 10:14 PM PST | Winter Storm Watch | MFR | Siskiyou | 40 hr |
| Jan 23, 2:35 AM PST | Winter Storm Watch | VEF | San Bernardino | 25 hr |
| Jan 23, 10:01 AM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 50 hr |
| Jan 23, 11:00 AM PST | Winter Storm Watch | STO | 53 hr | |
| Jan 23, 1:38 PM PST | Winter Storm Watch | VEF | Inyo | 48 hr |
| Jan 24, 3:01 PM PST | Winter Storm Watch | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 24 hr |
| Jan 26, 3:36 AM PST | Winter Storm Watch | LOX | 11 hr | |
| Jan 26, 4:06 AM PST | Winter Storm Watch | HNX | 12 hr | |
| Jan 26, 1:31 PM PST | Winter Storm Watch | SGX | Riverside, San Bernardino | 23 hr |
| Jan 26, 2:20 PM PST | Winter Storm Watch | LOX | 23 hr | |
| Jan 29, 2:59 PM PST | Winter Storm Watch | EKA | 15 hr | |
| Jan 29, 3:11 PM PST | Winter Storm Watch | MFR | Siskiyou | 48 hr |
| Jan 30, 2:31 AM PST | Winter Storm Watch | STO | 48 hr | |
| Jan 30, 2:48 AM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 35 hr |
| Jan 30, 12:56 PM PST | Winter Storm Watch | HNX | 37 hr | |
| Mar 4, 2:49 PM PST | Winter Storm Watch | MFR | Siskiyou | 7 hr |
| Mar 7, 12:40 PM PST | Winter Storm Watch | SGX | Riverside, San Bernardino, San Diego | 29 hr |
| Mar 7, 2:01 PM PST | Winter Storm Watch | LOX | 28 hr | |
| Mar 8, 2:30 AM PST | Winter Storm Watch | STO | 12 hr | |
| Mar 8, 2:51 AM PST | Winter Storm Watch | HNX | 10 hr | |
| Mar 8, 3:59 AM PST | Winter Storm Watch | REV | Alpine, El Dorado, Mono, Nevada, Placer | 11 hr |
| Mar 12, 10:21 PM PST | Winter Storm Watch | MFR | Siskiyou | 16 hr |
| Mar 13, 2:34 AM PST | Winter Storm Watch | STO | 11 hr | |
| Mar 13, 3:51 AM PST | Winter Storm Watch | HNX | 8 hr | |
| Mar 13, 4:06 AM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 22 hr |
| Mar 16, 1:34 PM PDT | Winter Storm Watch | STO | 24 hr | |
| Mar 16, 1:39 PM PDT | Winter Storm Watch | EKA | 14 hr | |
| Mar 17, 3:48 AM PDT | Winter Storm Watch | MFR | Siskiyou | 8 hr |
| Apr 22, 12:00 PM PDT | Winter Storm Watch | HNX | 24 hr | |
| Apr 22, 1:11 PM PDT | Winter Storm Watch | REV | Alpine, El Dorado, Nevada, Placer | 20 hr |
| Apr 22, 2:05 PM PDT | Winter Storm Watch | STO | 20 hr | |
| Oct 21, 12:23 PM PDT | Winter Storm Watch | HNX | Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne | 47 hr |
| Oct 21, 2:35 PM PDT | Winter Storm Watch | REV | Alpine, El Dorado, Mono, Nevada, Placer | 45 hr |
| Oct 21, 2:41 PM PDT | Winter Storm Watch | STO | 49 hr | |
| Oct 21, 2:45 PM PDT | Winter Storm Watch | VEF | Inyo | 47 hr |
| Nov 6, 3:08 AM PDT | Winter Storm Watch | MFR | Siskiyou | 24 hr |
| Nov 6, 3:45 AM PDT | Winter Storm Watch | EKA | 25 hr | |
| Nov 7, 1:50 AM PDT | Winter Storm Watch | STO | 13 hr | |
| Dec 6, 2:08 PM PST | Winter Storm Watch | STO | 23 hr | |
| Dec 6, 3:12 PM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Modoc, Mono, Nevada and 3 more | 23 hr |
| Dec 9, 1:38 PM PST | Winter Storm Watch | STO | 25 hr | |
| Dec 9, 1:41 PM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 37 hr |
| Dec 9, 2:13 PM PST | Winter Storm Watch | EKA | Humboldt, Trinity | 63 hr |
| Dec 9, 3:10 PM PST | Winter Storm Watch | MFR | Siskiyou | 38 hr |
| Dec 10, 3:35 AM PST | Winter Storm Watch | HNX | Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne | 34 hr |
| Dec 10, 1:32 PM PST | Winter Storm Watch | VEF | Inyo | 36 hr |
| Dec 11, 2:54 AM PST | Winter Storm Watch | REV | Modoc | 36 hr |
| Dec 12, 3:13 AM PST | Winter Storm Watch | SGX | Riverside, San Bernardino | 25 hr |
| Dec 12, 3:19 AM PST | Winter Storm Watch | LOX | 22 hr | |
| Dec 12, 12:40 PM PST | Winter Storm Watch | HNX | Kern | 26 hr |
| Dec 13, 2:25 PM PST | Winter Storm Watch | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 24 hr |
| Dec 14, 2:42 AM PST | Winter Storm Watch | MFR | Siskiyou | 12 hr |
| Dec 14, 3:48 AM PST | Winter Storm Watch | STO | 11 hr | |
| Dec 14, 5:10 AM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 9 hr |
| Dec 14, 12:34 PM PST | Winter Storm Watch | HNX | Fresno, Madera, Mariposa, Tulare, Tuolumne | 20 hr |
| Dec 19, 12:58 PM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 26 hr |
| Dec 19, 1:08 PM PST | Winter Storm Watch | HNX | Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne | 26 hr |
| Dec 19, 2:02 PM PST | Winter Storm Watch | STO | 25 hr | |
| Dec 20, 12:57 AM PST | Winter Storm Watch | VEF | Inyo | 24 hr |
| Dec 20, 2:24 AM PST | Winter Storm Watch | EKA | 35 hr | |
| Dec 20, 6:47 AM PST | Winter Storm Watch | MFR | Siskiyou | 21 hr |
| Dec 22, 4:32 AM PST | Winter Storm Watch | MFR | Siskiyou | 65 hr |
| Dec 23, 2:10 AM PST | Winter Storm Watch | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 11 hr |
| Dec 24, 3:18 AM PST | Winter Storm Watch | HNX | Fresno, Kern, Madera, Mariposa, Tulare | 25 hr |
| Dec 24, 7:48 AM PST | Winter Storm Watch | LOX | 14 hr | |
| Dec 24, 10:01 AM PST | Winter Storm Watch | EKA | Del Norte, Humboldt, Mendocino | 43 hr |
| Dec 24, 12:00 PM PST | Winter Storm Watch | SGX | Riverside, San Bernardino | 9 hr |
| Dec 25, 3:49 AM PST | Winter Storm Watch | HNX | Fresno, Kern, Madera, Mariposa, Tulare | 23 hr |
| Dec 25, 1:40 PM PST | Winter Storm Watch | SGX | Riverside, San Bernardino, San Diego | 24 hr |
| Dec 26, 3:59 AM PST | Winter Storm Watch | LOX | 10 hr | |
| Dec 27, 9:07 PM PST | Winter Storm Watch | STO | 6 hr | |
| Dec 28, 2:37 AM PST | Winter Storm Watch | LOX | 12 hr | |
| Dec 28, 3:00 AM PST | Winter Storm Watch | SGX | Riverside, San Bernardino, San Diego | 10 hr |
| Dec 28, 3:14 AM PST | Winter Storm Watch | VEF | Inyo | 11 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Siskiyou County11
- Alpine County10
- El Dorado County10
- Nevada County10
- Placer County10
- Mono County9
- San Bernardino County8
- Riverside County7
- Lassen County7
- Plumas County7
- Sierra County7
- Fresno County6
- Kern County6
- Madera County6
- Mariposa County6
- Tulare County6
- Inyo County5
- Humboldt County5
- San Diego County4
- Del Norte County4
- Mendocino County4
- Trinity County4
- Tuolumne County4
- Lake County3
- Modoc County2
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. Warning verification from the Mesonet's Cow. Rebuilt daily.