Freeze Warnings in California
1,060 freeze warnings 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 freeze warnings reaches back to 2005.
Freeze Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Freeze Warnings
- 1,060
- Busiest year
- 202384 freeze warnings
- Average year
- 48over 22 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.
- Siskiyou County155
- Mendocino County142
- Monterey County112
- Marin County102
- Napa County102
- Sonoma County102
- San Benito County87
- Modoc County86
- San Bernardino County79
- Humboldt County74
- Santa Clara County68
- Lake County64
- Santa Barbara County62
- Alameda County60
- Contra Costa County60
- Los Angeles County50
- Del Norte County45
- Riverside County44
- Trinity County38
- Kern County35
- Kings County34
- Tulare County34
- Fresno County31
- San Mateo County29
- San Luis Obispo County29
- Madera County28
- Merced County28
- Santa Cruz County27
- Mariposa County24
- Ventura County23
- San Diego County18
- Imperial County16
- Lassen County14
- Plumas County14
- Sierra County14
- Inyo County8
- Mono County2
- City and County of San Francisco1
The latest freeze warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 10:04 AM PDT | Freeze Warning | MFR | Modoc, Siskiyou | 23 hr |
| Jun 5, 9:26 PM PDT | Freeze Warning | MFR | Modoc, Siskiyou | 36 hr |
| Apr 22, 12:12 PM PDT | Freeze Warning | EKA | Lake, Mendocino, Trinity | 21 hr |
| Apr 17, 11:09 AM PDT | Freeze Warning | EKA | Trinity | 21 hr |
| Apr 16, 12:49 PM PDT | Freeze Warning | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 20 hr |
| Apr 16, 3:08 AM PDT | Freeze Warning | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 10 hr |
| Apr 16, 1:28 AM PDT | Freeze Warning | REV | Lassen, Modoc, Plumas, Sierra | 31 hr |
| Apr 15, 7:51 PM PDT | Freeze Warning | MFR | Siskiyou | 37 hr |
| Apr 15, 2:38 PM PDT | Freeze Warning | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 18 hr |
| Apr 1, 8:29 PM PDT | Freeze Warning | MFR | Siskiyou | 37 hr |
| Feb 20, 8:01 PM PST | Freeze Warning | LOX | Los Angeles, Santa Barbara | 13 hr |
| Feb 20, 3:11 AM PST | Freeze Warning | LOX | Santa Barbara | 5 hr |
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.