Alert archive / California / Frost Advisories
Frost Advisories in California, 2025
100 frost advisories in 2025. 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 frost advisories reaches back to 2005.
Frost Advisories by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Frost Advisories
- 100
- Busiest month
- January30 frost advisories
- Busiest day
- March 7, 20255 frost advisories
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 8, 10:40 PM PST | Frost Advisory | LOX | Santa Barbara, Ventura | 10 hr |
| Jan 9, 12:41 PM PST | Frost Advisory | LOX | Ventura | 19 hr |
| Jan 10, 1:34 PM PST | Frost Advisory | MTR | Monterey, San Benito | 19 hr |
| Jan 11, 1:55 AM PST | Frost Advisory | LOX | Ventura | 30 hr |
| Jan 11, 1:05 PM PST | Frost Advisory | MTR | Monterey, San Benito | 20 hr |
| Jan 12, 11:18 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Monterey, San Benito, Santa Clara | 22 hr |
| Jan 13, 2:11 AM PST | Frost Advisory | SGX | Riverside, San Bernardino | 7 hr |
| Jan 13, 2:11 AM PST | Frost Advisory | SGX | Riverside, San Bernardino | 31 hr |
| Jan 13, 11:59 AM PST | Frost Advisory | LOX | San Luis Obispo | 21 hr |
| Jan 13, 1:00 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 20 hr |
| Jan 14, 5:29 PM PST | Frost Advisory | MTR | Monterey, San Benito | 16 hr |
| Jan 15, 2:56 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 18 hr |
| Jan 16, 9:02 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 24 hr |
| Jan 16, 1:27 PM PST | Frost Advisory | LOX | Los Angeles, San Luis Obispo, Ventura | 20 hr |
| Jan 17, 8:38 AM PST | Frost Advisory | MTR | Monterey, San Benito | 24 hr |
| Jan 18, 12:23 PM PST | Frost Advisory | MTR | Monterey, San Benito | 21 hr |
| Jan 19, 1:31 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 19 hr |
| Jan 20, 11:29 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 22 hr |
| Jan 21, 1:41 AM PST | Frost Advisory | LOX | Santa Barbara | 7 hr |
| Jan 21, 11:26 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 23 hr |
| Jan 22, 1:44 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 1 more | 19 hr |
| Jan 23, 2:58 AM PST | Frost Advisory | LOX | San Luis Obispo, Santa Barbara | 30 hr |
| Jan 23, 2:07 PM PST | Frost Advisory | MTR | Monterey | 19 hr |
| Jan 24, 11:07 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 22 hr |
| Jan 25, 10:39 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Monterey, San Benito, Santa Clara | 22 hr |
| Jan 26, 10:45 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Mateo and 3 more | 22 hr |
| Jan 27, 3:15 AM PST | Frost Advisory | LOX | Los Angeles, San Luis Obispo, Santa Barbara, Ventura | 30 hr |
| Jan 27, 11:57 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Mateo and 3 more | 21 hr |
| Jan 28, 10:33 AM PST | Frost Advisory | MTR | Marin, Monterey, Napa, San Benito, Santa Clara, Sonoma | 22 hr |
| Jan 28, 9:07 PM PST | Frost Advisory | LOX | Los Angeles, Ventura | 12 hr |
| Feb 4, 12:54 PM PST | Frost Advisory | MTR | Marin, Napa, Sonoma | 20 hr |
| Feb 5, 9:57 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, Sonoma | 19 hr |
| Feb 7, 12:25 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 33 hr |
| Feb 7, 11:21 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 34 hr |
| Feb 8, 11:25 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, San Mateo, Santa Clara and 2 more | 34 hr |
| Feb 9, 11:49 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 33 hr |
| Feb 14, 1:37 AM PST | Frost Advisory | MTR | Marin, Monterey, Napa, San Benito, Santa Clara, Sonoma | 31 hr |
| Mar 6, 10:56 AM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 21 hr |
| Mar 6, 11:32 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 21 hr |
| Mar 6, 8:50 PM PST | Frost Advisory | LOX | Los Angeles, San Luis Obispo, Santa Barbara, Ventura | 12 hr |
| Mar 6, 11:49 PM PST | Frost Advisory | SGX | Riverside, San Bernardino | 9 hr |
| Mar 6, 11:49 PM PST | Frost Advisory | SGX | Riverside, San Bernardino, San Diego | 33 hr |
| Mar 7, 10:45 AM PST | Frost Advisory | EKA | Lake, Mendocino | 22 hr |
| Mar 7, 12:14 PM PST | Frost Advisory | MTR | Monterey, San Benito | 21 hr |
| Mar 7, 8:50 PM PST | Frost Advisory | LOX | Ventura | 11 hr |
| Mar 8, 11:41 AM PST | Frost Advisory | EKA | Lake, Mendocino | 21 hr |
| Mar 9, 1:55 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 18 hr |
| Mar 13, 12:48 AM PDT | Frost Advisory | MTR | Monterey, San Benito | 31 hr |
| Mar 17, 2:21 AM PDT | Frost Advisory | MTR | Marin, Monterey, Napa, San Benito, Sonoma | 31 hr |
| Mar 17, 2:59 AM PDT | Frost Advisory | EKA | Mendocino | 30 hr |
| Mar 18, 1:45 AM PDT | Frost Advisory | MTR | Marin, Monterey, Napa, San Benito, Sonoma | 31 hr |
| Mar 18, 2:58 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 18 hr |
| Mar 19, 9:00 PM PDT | Frost Advisory | EKA | Mendocino | 13 hr |
| Mar 28, 12:42 PM PDT | Frost Advisory | EKA | Mendocino | 19 hr |
| Apr 1, 1:34 PM PDT | Frost Advisory | EKA | Mendocino | 19 hr |
| Apr 2, 3:36 AM PDT | Frost Advisory | EKA | Mendocino | 29 hr |
| Apr 2, 12:42 PM PDT | Frost Advisory | MTR | Marin, Monterey, Napa, San Benito, Sonoma | 20 hr |
| Apr 3, 3:27 AM PDT | Frost Advisory | EKA | Lake, Mendocino | 30 hr |
| Apr 11, 1:14 AM PDT | Frost Advisory | EKA | Lake, Mendocino | 31 hr |
| Apr 20, 2:28 AM PDT | Frost Advisory | EKA | Trinity | 30 hr |
| Apr 21, 12:40 PM PDT | Frost Advisory | EKA | Trinity | 20 hr |
| Apr 22, 12:00 PM PDT | Frost Advisory | EKA | Trinity | 21 hr |
| May 3, 3:02 AM PDT | Frost Advisory | EKA | Humboldt, Lake, Mendocino, Trinity | 29 hr |
| May 5, 1:17 AM PDT | Frost Advisory | EKA | Humboldt, Trinity | 9 hr |
| May 13, 12:35 PM PDT | Frost Advisory | EKA | Lake, Mendocino, Trinity | 20 hr |
| May 17, 1:01 PM PDT | Frost Advisory | EKA | Trinity | 21 hr |
| Jun 20, 11:17 AM PDT | Frost Advisory | EKA | Lake, Mendocino, Trinity | 18 hr |
| Sep 20, 1:55 PM PDT | Frost Advisory | MFR | Modoc, Siskiyou | 42 hr |
| Oct 5, 11:37 PM PDT | Frost Advisory | EKA | Trinity | 9 hr |
| Oct 11, 12:57 AM PDT | Frost Advisory | EKA | Lake, Mendocino, Trinity | 8 hr |
| Oct 18, 8:17 PM PDT | Frost Advisory | MFR | Siskiyou | 36 hr |
| Oct 19, 4:39 PM PDT | Frost Advisory | EKA | Trinity | 17 hr |
| Oct 20, 11:34 AM PDT | Frost Advisory | EKA | Trinity | 21 hr |
| Oct 26, 8:45 PM PDT | Frost Advisory | EKA | Mendocino, Trinity | 36 hr |
| Oct 26, 9:12 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt | 12 hr |
| Oct 28, 10:21 AM PDT | Frost Advisory | EKA | Trinity | 23 hr |
| Nov 20, 1:04 PM PST | Frost Advisory | EKA | Mendocino, Trinity | 21 hr |
| Nov 22, 12:01 PM PST | Frost Advisory | EKA | Humboldt, Mendocino, Trinity | 21 hr |
| Nov 24, 10:39 AM PST | Frost Advisory | EKA | Trinity | 22 hr |
| Nov 24, 7:34 PM PST | Frost Advisory | LOX | Los Angeles, San Luis Obispo | 13 hr |
| Nov 25, 12:40 PM PST | Frost Advisory | EKA | Humboldt, Mendocino, Trinity | 20 hr |
| Nov 25, 7:45 PM PST | Frost Advisory | LOX | Los Angeles | 13 hr |
| Nov 26, 12:06 PM PST | Frost Advisory | EKA | Mendocino | 21 hr |
| Nov 28, 2:42 AM PST | Frost Advisory | EKA | Mendocino | 6 hr |
| Nov 28, 11:27 PM PST | Frost Advisory | EKA | 9 hr | |
| Nov 29, 9:57 PM PST | Frost Advisory | EKA | Mendocino | 8 hr |
| Nov 30, 2:03 PM PST | Frost Advisory | EKA | Humboldt | 18 hr |
| Dec 1, 11:59 AM PST | Frost Advisory | LOX | Santa Barbara | 23 min |
| Dec 1, 12:22 PM PST | Frost Advisory | LOX | Santa Barbara | 20 hr |
| Dec 2, 10:21 AM PST | Frost Advisory | EKA | Humboldt, Mendocino | 23 hr |
| Dec 2, 2:21 PM PST | Frost Advisory | LOX | Ventura | 18 hr |
| Dec 3, 11:38 AM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 21 hr |
| Dec 3, 1:09 PM PST | Frost Advisory | LOX | Los Angeles, Santa Barbara, Ventura | 19 hr |
| Dec 4, 7:19 PM PST | Frost Advisory | LOX | Ventura | 13 hr |
| Dec 5, 6:30 AM PST | Frost Advisory | EKA | Mendocino | 90 min |
| Dec 27, 12:48 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 20 hr |
| Dec 28, 11:11 AM PST | Frost Advisory | STO | 22 hr | |
| Dec 28, 7:29 PM PST | Frost Advisory | LOX | Ventura | 15 hr |
| Dec 28, 8:02 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 13 hr |
| Dec 29, 1:15 PM PST | Frost Advisory | EKA | Humboldt | 20 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Monterey County31
- Mendocino County28
- San Benito County26
- Marin County22
- Sonoma County22
- Napa County21
- Alameda County18
- Contra Costa County18
- Santa Clara County18
- Trinity County18
- Ventura County12
- Humboldt County12
- Lake County10
- Santa Barbara County8
- San Mateo County8
- Santa Cruz County8
- Los Angeles County7
- San Luis Obispo County6
- Del Norte County5
- Riverside County4
- San Bernardino County4
- Siskiyou County2
- San Diego County1
- Modoc County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.