Alert archive / California / Winter Storm Warnings
Winter Storm Warnings in California, 2018
55 winter storm warnings in 2018. 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 warnings reaches back to 2005.
Winter Storm Warnings by county
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Winter Storm Warnings
- 55
- Busiest month
- March19 winter storm warnings
- Busiest day
- January 7, 20184 winter storm 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 7, 9:57 AM PST | Winter Storm Warning | HNX | 58 hr | |
| Jan 7, 2:01 PM PST | Winter Storm Warning | REV | Mono | 36 hr |
| Jan 7, 2:18 PM PST | Winter Storm Warning | VEF | Inyo | 50 hr |
| Jan 7, 2:45 PM PST | Winter Storm Warning | LOX | 53 hr | |
| Jan 7, 6:49 PM PST | Winter Storm Warning | SGX | Riverside, San Bernardino | 51 hr |
| Jan 17, 2:11 PM PST | Winter Storm Warning | STO | 49 hr | |
| Jan 17, 2:32 PM PST | Winter Storm Warning | REV | Alpine, El Dorado, Nevada, Placer | 41 hr |
| Jan 20, 1:05 PM PST | Winter Storm Warning | STO | 14 hr | |
| Jan 20, 1:47 PM PST | Winter Storm Warning | EKA | 32 hr | |
| Jan 20, 3:23 PM PST | Winter Storm Warning | MFR | Siskiyou | 27 hr |
| Jan 22, 3:35 PM PST | Winter Storm Warning | MFR | Siskiyou | 3 days |
| Jan 23, 12:17 PM PST | Winter Storm Warning | STO | 63 hr | |
| Feb 24, 4:06 PM PST | Winter Storm Warning | MFR | Siskiyou | 36 hr |
| Feb 26, 1:42 PM PST | Winter Storm Warning | SGX | Riverside, San Bernardino, San Diego | 32 hr |
| Feb 27, 12:26 PM PST | Winter Storm Warning | STO | 5 days | |
| Feb 27, 2:09 PM PST | Winter Storm Warning | MFR | Modoc, Siskiyou | 4 days |
| Feb 27, 2:12 PM PST | Winter Storm Warning | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 4 days |
| Feb 27, 3:44 PM PST | Winter Storm Warning | EKA | Del Norte, Humboldt, Mendocino, Trinity | 3 days |
| Feb 28, 4:27 AM PST | Winter Storm Warning | HNX | 4 days | |
| Feb 28, 2:20 PM PST | Winter Storm Warning | VEF | Inyo | 68 hr |
| Mar 1, 2:54 AM PST | Winter Storm Warning | LOX | 47 hr | |
| Mar 1, 1:04 PM PST | Winter Storm Warning | SGX | San Bernardino | 55 hr |
| Mar 1, 10:59 PM PST | Winter Storm Warning | MFR | Siskiyou | 29 hr |
| Mar 12, 3:00 AM PDT | Winter Storm Warning | STO | 68 hr | |
| Mar 12, 4:05 AM PDT | Winter Storm Warning | HNX | 66 hr | |
| Mar 12, 2:25 PM PDT | Winter Storm Warning | REV | Alpine, El Dorado, Nevada, Placer | 55 hr |
| Mar 13, 4:45 PM PDT | Winter Storm Warning | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 3 days |
| Mar 14, 2:13 PM PDT | Winter Storm Warning | MFR | Siskiyou | 42 hr |
| Mar 14, 3:26 PM PDT | Winter Storm Warning | STO | 62 hr | |
| Mar 14, 9:51 PM PDT | Winter Storm Warning | HNX | 24 hr | |
| Mar 15, 9:37 PM PDT | Winter Storm Warning | HNX | 31 hr | |
| Mar 20, 3:12 AM PDT | Winter Storm Warning | HNX | 68 hr | |
| Mar 20, 12:49 PM PDT | Winter Storm Warning | REV | Alpine, El Dorado, Mono, Nevada, Placer | 58 hr |
| Mar 21, 12:49 PM PDT | Winter Storm Warning | STO | 32 hr | |
| Mar 21, 2:06 PM PDT | Winter Storm Warning | MFR | Siskiyou | 3 days |
| Mar 22, 3:28 AM PDT | Winter Storm Warning | EKA | Del Norte, Humboldt, Mendocino, Trinity | 29 hr |
| Mar 23, 3:30 AM PDT | Winter Storm Warning | STO | 35 hr | |
| Mar 23, 3:40 AM PDT | Winter Storm Warning | EKA | Mendocino, Trinity | 11 hr |
| Mar 24, 3:57 AM PDT | Winter Storm Warning | EKA | Del Norte, Humboldt, Mendocino, Trinity | 25 hr |
| Nov 20, 2:14 PM PST | Winter Storm Warning | HNX | 42 hr | |
| Nov 20, 2:25 PM PST | Winter Storm Warning | STO | 3 days | |
| Nov 20, 3:44 PM PST | Winter Storm Warning | REV | Alpine, El Dorado, Mono, Nevada, Placer | 38 hr |
| Nov 21, 2:34 PM PST | Winter Storm Warning | MFR | Siskiyou | 42 hr |
| Nov 27, 12:55 PM PST | Winter Storm Warning | REV | Alpine, El Dorado, Mono, Nevada, Placer | 63 hr |
| Nov 27, 2:00 PM PST | Winter Storm Warning | VEF | Inyo | 62 hr |
| Nov 27, 2:10 PM PST | Winter Storm Warning | STO | 56 hr | |
| Nov 28, 1:57 AM PST | Winter Storm Warning | HNX | 49 hr | |
| Nov 29, 10:49 AM PST | Winter Storm Warning | STO | 61 hr | |
| Nov 29, 1:57 PM PST | Winter Storm Warning | REV | Alpine, El Dorado, Lassen, Nevada, Placer, Plumas and 1 more | 49 hr |
| Nov 29, 3:46 PM PST | Winter Storm Warning | MFR | Modoc, Siskiyou | 48 hr |
| Dec 6, 10:10 AM PST | Winter Storm Warning | SGX | San Bernardino | 14 hr |
| Dec 15, 11:00 AM PST | Winter Storm Warning | STO | 41 hr | |
| Dec 23, 11:53 AM PST | Winter Storm Warning | STO | 42 hr | |
| Dec 23, 2:36 PM PST | Winter Storm Warning | MFR | Modoc | 29 hr |
| Dec 24, 3:01 AM PST | Winter Storm Warning | HNX | 27 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 archive20172019
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.