Alert archive / California / Frost Advisories
Frost Advisories in California, 2024
100 frost advisories in 2024. 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 2024. Tap one for its archive.
- Frost Advisories
- 100
- Busiest month
- November27 frost advisories
- Busiest day
- November 16, 20245 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 3, 2:58 AM PST | Frost Advisory | SGX | Riverside, San Bernardino | 30 hr |
| Jan 3, 2:58 AM PST | Frost Advisory | SGX | Riverside, San Bernardino | 54 hr |
| Jan 4, 3:23 AM PST | Frost Advisory | SGX | Riverside, San Bernardino | 54 hr |
| Jan 4, 1:08 PM PST | Frost Advisory | LOX | Los Angeles | 20 hr |
| Jan 4, 5:54 PM PST | Frost Advisory | MTR | Monterey, San Benito | 40 hr |
| Jan 5, 11:14 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 47 hr |
| Jan 6, 2:25 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 44 hr |
| Jan 7, 10:38 AM PST | Frost Advisory | SGX | Riverside, San Diego | 22 hr |
| Jan 7, 10:38 AM PST | Frost Advisory | SGX | Riverside, San Diego | 46 hr |
| Jan 7, 1:47 PM PST | Frost Advisory | LOX | Los Angeles, Santa Barbara, Ventura | 19 hr |
| Jan 8, 12:48 AM PST | Frost Advisory | MTR | Monterey, San Benito | 33 hr |
| Jan 8, 9:04 PM PST | Frost Advisory | LOX | Los Angeles, Ventura | 13 hr |
| Jan 9, 11:01 AM PST | Frost Advisory | MTR | Monterey, San Benito | 23 hr |
| Jan 10, 4:40 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 29 hr |
| Jan 11, 9:42 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 24 hr |
| Jan 11, 12:26 PM PST | Frost Advisory | SGX | Riverside, San Bernardino, San Diego | 20 hr |
| Jan 11, 1:02 PM PST | Frost Advisory | LOX | Los Angeles, Santa Barbara, Ventura | 20 hr |
| Feb 7, 3:10 AM PST | Frost Advisory | MTR | Marin, Monterey, Napa, San Benito, Sonoma | 30 hr |
| Feb 8, 12:24 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 21 hr |
| Feb 9, 2:30 AM PST | Frost Advisory | MTR | Monterey, San Benito, Santa Clara | 31 hr |
| Feb 10, 12:21 AM PST | Frost Advisory | MTR | Monterey, San Benito, Santa Clara | 33 hr |
| Feb 10, 3:56 AM PST | Frost Advisory | SGX | Riverside, San Bernardino, San Diego | 28 hr |
| Feb 11, 12:00 AM PST | Frost Advisory | LOX | Los Angeles, San Luis Obispo, Santa Barbara, Ventura | 9 hr |
| Feb 11, 12:18 AM PST | Frost Advisory | MTR | Monterey, San Benito, Santa Clara | 33 hr |
| Feb 11, 3:40 AM PST | Frost Advisory | SGX | Riverside, San Bernardino, San Diego | 28 hr |
| Feb 11, 11:17 PM PST | Frost Advisory | LOX | Los Angeles, Ventura | 9 hr |
| Feb 25, 11:45 PM PST | Frost Advisory | MTR | Marin, Napa, Sonoma | 33 hr |
| Feb 27, 5:50 AM PST | Frost Advisory | MTR | Marin, Napa, Sonoma | 27 hr |
| Mar 2, 3:08 AM PST | Frost Advisory | MTR | Marin, Napa, Sonoma | 30 hr |
| Mar 3, 2:13 AM PST | Frost Advisory | MTR | Marin, Napa, Sonoma | 31 hr |
| Mar 7, 5:42 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino | 15 hr |
| Mar 12, 5:16 AM PDT | Frost Advisory | EKA | Mendocino | 28 hr |
| Mar 13, 1:44 PM PDT | Frost Advisory | EKA | Humboldt, Mendocino | 19 hr |
| Mar 24, 2:32 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 18 hr |
| Mar 25, 2:24 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 19 hr |
| Apr 5, 12:46 AM PDT | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 32 hr |
| Apr 5, 6:38 PM PDT | Frost Advisory | LOX | Los Angeles, San Luis Obispo, Santa Barbara, Ventura | 13 hr |
| Apr 6, 2:19 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 19 hr |
| Apr 6, 2:36 PM PDT | Frost Advisory | LOX | Los Angeles, San Luis Obispo, Santa Barbara | 18 hr |
| Apr 7, 12:53 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 20 hr |
| Apr 16, 9:12 PM PDT | Frost Advisory | EKA | Trinity | 12 hr |
| Apr 26, 3:18 AM PDT | Frost Advisory | EKA | Lake, Mendocino, Trinity | 28 hr |
| Apr 28, 4:25 AM PDT | Frost Advisory | EKA | Mendocino, Trinity | 29 hr |
| Apr 30, 2:52 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Trinity | 17 hr |
| May 3, 2:46 AM PDT | Frost Advisory | EKA | Trinity | 5 hr |
| May 5, 2:07 AM PDT | Frost Advisory | EKA | Mendocino, Trinity | 32 hr |
| May 6, 3:30 AM PDT | Frost Advisory | LOX | San Luis Obispo, Santa Barbara | 5 hr |
| May 6, 3:37 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino, Trinity | 17 hr |
| May 7, 1:25 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 20 hr |
| May 19, 1:04 PM PDT | Frost Advisory | EKA | Humboldt, Trinity | 20 hr |
| May 22, 2:01 PM PDT | Frost Advisory | EKA | Humboldt, Trinity | 18 hr |
| May 23, 12:01 PM PDT | Frost Advisory | EKA | Trinity | 20 hr |
| Jun 16, 2:58 AM PDT | Frost Advisory | EKA | Humboldt, Mendocino, Trinity | 30 hr |
| Sep 21, 1:45 AM PDT | Frost Advisory | MFR | Modoc | 31 hr |
| Oct 16, 1:25 PM PDT | Frost Advisory | EKA | Humboldt, Lake, Mendocino, Trinity | 18 hr |
| Oct 17, 11:39 AM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino | 22 hr |
| Oct 18, 2:03 PM PDT | Frost Advisory | EKA | Mendocino | 18 hr |
| Oct 21, 1:54 PM PDT | Frost Advisory | EKA | Lake, Mendocino | 17 hr |
| Oct 22, 12:27 PM PDT | Frost Advisory | EKA | Mendocino | 20 hr |
| Oct 23, 1:17 AM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino | 32 hr |
| Oct 28, 8:58 PM PDT | Frost Advisory | MFR | Siskiyou | 12 hr |
| Oct 29, 3:22 AM PDT | Frost Advisory | LOX | Los Angeles, San Luis Obispo, Santa Barbara | 30 hr |
| Oct 29, 12:27 PM PDT | Frost Advisory | SGX | San Bernardino | 21 hr |
| Oct 31, 6:23 PM PDT | Frost Advisory | LOX | San Luis Obispo, Santa Barbara, Ventura | 15 hr |
| Nov 4, 10:14 PM PST | Frost Advisory | LOX | San Luis Obispo | 11 hr |
| Nov 6, 5:39 PM PST | Frost Advisory | SGX | San Bernardino | 15 hr |
| Nov 6, 7:00 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 13 hr |
| Nov 7, 12:40 PM PST | Frost Advisory | SGX | San Bernardino | 20 hr |
| Nov 7, 11:37 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 8 hr |
| Nov 8, 12:54 PM PST | Frost Advisory | SGX | San Bernardino | 20 hr |
| Nov 8, 10:22 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 10 hr |
| Nov 12, 7:34 AM PST | Frost Advisory | MTR | Monterey | 24 hr |
| Nov 13, 2:08 AM PST | Frost Advisory | LOX | Los Angeles, Santa Barbara, Ventura | 7 hr |
| Nov 13, 10:03 PM PST | Frost Advisory | LOX | Los Angeles, Santa Barbara, Ventura | 11 hr |
| Nov 14, 10:13 AM PST | Frost Advisory | MTR | Monterey, San Benito | 46 hr |
| Nov 15, 2:49 AM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 29 hr |
| Nov 16, 2:12 AM PST | Frost Advisory | SGX | Riverside, San Bernardino, San Diego | 31 hr |
| Nov 16, 2:39 AM PST | Frost Advisory | LOX | Ventura | 6 hr |
| Nov 16, 11:31 AM PST | Frost Advisory | MTR | Monterey | 20 hr |
| Nov 16, 12:51 PM PST | Frost Advisory | SGX | San Diego | 2 min |
| Nov 16, 1:13 PM PST | Frost Advisory | LOX | San Luis Obispo, Santa Barbara, Ventura | 20 hr |
| Nov 17, 9:39 PM PST | Frost Advisory | LOX | Los Angeles, Ventura | 10 hr |
| Nov 17, 11:32 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Santa Clara, Santa Cruz | 32 hr |
| Nov 20, 8:05 PM PST | Frost Advisory | LOX | Los Angeles, Ventura | 12 hr |
| Nov 21, 7:32 PM PST | Frost Advisory | LOX | Los Angeles, Ventura | 12 hr |
| Nov 26, 2:06 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 55 hr |
| Nov 26, 1:23 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 21 hr |
| Nov 26, 10:51 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 58 hr |
| Nov 27, 2:44 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 18 hr |
| Nov 28, 12:10 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, Santa Clara and 1 more | 57 hr |
| Dec 8, 12:39 PM PST | Frost Advisory | MTR | Monterey | 20 hr |
| Dec 8, 11:53 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 33 hr |
| Dec 10, 9:54 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 23 hr |
| Dec 11, 3:08 AM PST | Frost Advisory | LOX | Los Angeles | 6 hr |
| Dec 11, 9:16 PM PST | Frost Advisory | LOX | Los Angeles, Ventura | 12 hr |
| Dec 14, 11:02 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 22 hr |
| Dec 15, 11:49 PM PST | Frost Advisory | LOX | Los Angeles, Ventura | 8 hr |
| Dec 24, 1:34 PM PST | Frost Advisory | MTR | Marin, Monterey, Napa, San Benito, Sonoma | 17 hr |
| Dec 29, 2:02 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 2 more | 31 hr |
| Dec 29, 2:05 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, San Mateo, Santa Clara and 2 more | 44 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Monterey County26
- Mendocino County25
- San Benito County21
- Marin County20
- Sonoma County20
- Napa County19
- Santa Clara County18
- Los Angeles County17
- Humboldt County17
- Ventura County16
- Alameda County15
- Contra Costa County15
- Trinity County13
- San Bernardino County11
- Santa Barbara County11
- Lake County11
- Riverside County9
- Del Norte County9
- San Luis Obispo County8
- Santa Cruz County7
- San Diego County7
- San Mateo County6
- Modoc County1
- Siskiyou County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20232025
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.