Alert archive / California / Winter Storm Watches
Winter Storm Watches in California, 2020
40 winter storm watches in 2020. 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 2020. Tap one for its archive.
- Winter Storm Watches
- 40
- Busiest month
- December9 winter storm watches
- Busiest day
- January 12, 20204 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 12, 3:40 AM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 58 hr |
| Jan 12, 4:07 AM PST | Winter Storm Watch | MFR | Siskiyou | 58 hr |
| Jan 12, 4:20 AM PST | Winter Storm Watch | HNX | 56 hr | |
| Jan 12, 4:25 AM PST | Winter Storm Watch | STO | 58 hr | |
| Jan 13, 2:16 PM PST | Winter Storm Watch | EKA | Del Norte, Humboldt, Mendocino, Trinity | 24 hr |
| Jan 19, 1:27 PM PST | Winter Storm Watch | MFR | Siskiyou | 13 hr |
| Jan 19, 2:59 PM PST | Winter Storm Watch | EKA | 13 hr | |
| Feb 8, 2:16 PM PST | Winter Storm Watch | LOX | 14 hr | |
| Feb 8, 2:16 PM PST | Winter Storm Watch | SGX | San Bernardino | 14 hr |
| Mar 11, 1:54 PM PDT | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 49 hr |
| Mar 11, 2:22 PM PDT | Winter Storm Watch | STO | 43 hr | |
| Mar 12, 2:03 AM PDT | Winter Storm Watch | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 24 hr |
| Mar 12, 9:32 AM PDT | Winter Storm Watch | MFR | Siskiyou | 37 hr |
| Mar 12, 12:11 PM PDT | Winter Storm Watch | HNX | 63 hr | |
| Mar 15, 1:13 PM PDT | Winter Storm Watch | SGX | Riverside, San Bernardino, San Diego | 13 hr |
| Mar 15, 2:43 PM PDT | Winter Storm Watch | HNX | 12 hr | |
| Mar 15, 2:56 PM PDT | Winter Storm Watch | LOX | 12 hr | |
| Apr 2, 12:23 PM PDT | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 27 hr |
| Apr 2, 12:32 PM PDT | Winter Storm Watch | HNX | 38 hr | |
| Apr 2, 2:11 PM PDT | Winter Storm Watch | EKA | 24 hr | |
| Apr 2, 2:19 PM PDT | Winter Storm Watch | STO | 24 hr | |
| Apr 3, 12:48 PM PDT | Winter Storm Watch | VEF | Inyo | 61 hr |
| Apr 4, 3:28 AM PDT | Winter Storm Watch | LOX | 24 hr | |
| Apr 4, 3:52 AM PDT | Winter Storm Watch | SGX | Riverside, San Bernardino | 24 hr |
| May 15, 12:25 PM PDT | Winter Storm Watch | STO | 39 hr | |
| May 15, 1:04 PM PDT | Winter Storm Watch | HNX | 24 hr | |
| Nov 4, 2:26 PM PST | Winter Storm Watch | STO | 25 hr | |
| Nov 5, 2:20 AM PST | Winter Storm Watch | HNX | 35 hr | |
| Nov 11, 2:42 AM PST | Winter Storm Watch | MFR | Siskiyou | 25 hr |
| Nov 15, 9:29 AM PST | Winter Storm Watch | STO | 17 hr | |
| Nov 15, 11:49 AM PST | Winter Storm Watch | REV | Alpine, El Dorado, Nevada, Placer | 27 hr |
| Dec 14, 12:56 PM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 21 hr |
| Dec 14, 1:25 PM PST | Winter Storm Watch | STO | 23 hr | |
| Dec 22, 10:25 AM PST | Winter Storm Watch | STO | 40 hr | |
| Dec 22, 11:50 AM PST | Winter Storm Watch | EKA | Trinity | 39 hr |
| Dec 22, 1:03 PM PST | Winter Storm Watch | REV | Alpine, El Dorado, Lassen, Nevada, Placer, Plumas and 1 more | 37 hr |
| Dec 22, 2:27 PM PST | Winter Storm Watch | MFR | Siskiyou | 36 hr |
| Dec 25, 12:09 PM PST | Winter Storm Watch | HNX | 38 hr | |
| Dec 26, 3:10 AM PST | Winter Storm Watch | SGX | Riverside, San Bernardino, San Diego | 24 hr |
| Dec 26, 4:29 AM PST | Winter Storm Watch | LOX | 23 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.