Alert archive / California / Frost Advisories
Frost Advisories in California, 2018
78 frost advisories 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 frost advisories reaches back to 2005.
Frost Advisories by county
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Frost Advisories
- 78
- Busiest month
- November16 frost advisories
- Busiest day
- March 4, 20183 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 20, 3:55 AM PST | Frost Advisory | SGX | Riverside, San Bernardino | 28 hr |
| Jan 20, 9:41 PM PST | Frost Advisory | LOX | 11 hr | |
| Jan 25, 2:00 PM PST | Frost Advisory | LOX | 19 hr | |
| Feb 18, 4:47 AM PST | Frost Advisory | SGX | Riverside, San Diego | 52 hr |
| Feb 18, 4:47 AM PST | Frost Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 3 days |
| Feb 18, 4:44 PM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, San Mateo, Santa Clara and 2 more | 40 hr |
| Feb 19, 9:06 PM PST | Frost Advisory | LOX | Los Angeles | 12 hr |
| Feb 21, 12:57 AM PST | Frost Advisory | LOX | 8 hr | |
| Feb 21, 1:52 PM PST | Frost Advisory | LOX | Los Angeles | 19 hr |
| Feb 23, 1:04 PM PST | Frost Advisory | SGX | Riverside, San Diego | 19 hr |
| Feb 23, 2:06 PM PST | Frost Advisory | LOX | Los Angeles | 19 hr |
| Feb 24, 3:14 AM PST | Frost Advisory | SGX | Riverside, San Bernardino | 29 hr |
| Feb 24, 2:15 PM PST | Frost Advisory | LOX | 19 hr | |
| Feb 27, 1:39 PM PST | Frost Advisory | SGX | Riverside, San Bernardino | 18 hr |
| Feb 27, 2:29 PM PST | Frost Advisory | LOX | Los Angeles | 9 hr |
| Feb 27, 11:00 PM PST | Frost Advisory | LOX | Los Angeles | 10 hr |
| Mar 3, 5:44 PM PST | Frost Advisory | LOX | Los Angeles | 15 hr |
| Mar 4, 2:17 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 19 hr |
| Mar 4, 2:44 PM PST | Frost Advisory | LOX | 18 hr | |
| Mar 5, 2:26 PM PST | Frost Advisory | EKA | Mendocino | 19 hr |
| Mar 16, 2:12 PM PDT | Frost Advisory | EKA | Mendocino | 19 hr |
| Mar 17, 2:10 PM PDT | Frost Advisory | EKA | Humboldt, Mendocino | 19 hr |
| Mar 18, 2:03 PM PDT | Frost Advisory | EKA | Mendocino | 19 hr |
| Mar 25, 3:43 AM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 29 hr |
| Mar 25, 11:46 AM PDT | Frost Advisory | LOX | 21 hr | |
| Mar 27, 2:26 AM PDT | Frost Advisory | EKA | Mendocino | 7 hr |
| Apr 2, 2:05 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 19 hr |
| Apr 12, 3:21 PM PDT | Frost Advisory | EKA | Humboldt, Mendocino | 17 hr |
| Apr 16, 3:15 AM PDT | Frost Advisory | EKA | Humboldt, Mendocino | 31 hr |
| Apr 18, 3:26 AM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 30 hr |
| Apr 19, 2:27 PM PDT | Frost Advisory | EKA | Humboldt, Trinity | 19 hr |
| Apr 30, 2:50 AM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Trinity | 30 hr |
| Jun 9, 2:22 AM PDT | Frost Advisory | EKA | Trinity | 30 hr |
| Sep 10, 1:38 PM PDT | Frost Advisory | MFR | Modoc, Siskiyou | 19 hr |
| Sep 11, 12:05 PM PDT | Frost Advisory | MFR | Modoc, Siskiyou | 21 hr |
| Sep 11, 2:06 PM PDT | Frost Advisory | EKA | Mendocino, Trinity | 18 hr |
| Oct 10, 2:40 AM PDT | Frost Advisory | EKA | Trinity | 30 hr |
| Oct 11, 1:37 PM PDT | Frost Advisory | EKA | Trinity | 18 hr |
| Oct 13, 2:25 PM PDT | Frost Advisory | MFR | Siskiyou | 19 hr |
| Oct 14, 2:00 PM PDT | Frost Advisory | MFR | Siskiyou | 19 hr |
| Oct 15, 2:20 PM PDT | Frost Advisory | MFR | Siskiyou | 19 hr |
| Oct 15, 2:38 PM PDT | Frost Advisory | EKA | Humboldt, Mendocino | 18 hr |
| Oct 16, 3:04 AM PDT | Frost Advisory | LOX | 6 hr | |
| Oct 16, 2:24 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 19 hr |
| Oct 17, 2:09 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 19 hr |
| Oct 18, 2:39 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 18 hr |
| Oct 20, 2:50 PM PDT | Frost Advisory | EKA | Mendocino | 18 hr |
| Oct 29, 2:29 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 19 hr |
| Oct 30, 2:40 PM PDT | Frost Advisory | EKA | Mendocino | 19 hr |
| Nov 6, 3:42 AM PST | Frost Advisory | EKA | Mendocino | 12 hr |
| Nov 6, 3:17 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 18 hr |
| Nov 7, 3:53 AM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 29 hr |
| Nov 8, 1:04 PM PST | Frost Advisory | MTR | Monterey | 20 hr |
| Nov 8, 1:04 PM PST | Frost Advisory | MTR | Marin, Monterey, Napa, Sonoma | 44 hr |
| Nov 8, 2:12 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 7 hr |
| Nov 9, 2:00 AM PST | Frost Advisory | SGX | San Bernardino | 54 hr |
| Nov 9, 12:52 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 20 hr |
| Nov 10, 11:50 AM PST | Frost Advisory | MTR | Monterey | 21 hr |
| Nov 10, 3:18 PM PST | Frost Advisory | EKA | Humboldt | 5 hr |
| Nov 10, 7:57 PM PST | Frost Advisory | EKA | Del Norte | 13 hr |
| Nov 11, 9:17 PM PST | Frost Advisory | EKA | Del Norte | 12 hr |
| Nov 12, 3:01 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 18 hr |
| Nov 13, 3:08 PM PST | Frost Advisory | EKA | Humboldt | 18 hr |
| Nov 17, 2:11 PM PST | Frost Advisory | EKA | Humboldt | 6 hr |
| Nov 19, 1:11 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 20 hr |
| Dec 2, 11:42 AM PST | Frost Advisory | EKA | Del Norte | 10 hr |
| Dec 2, 8:14 PM PST | Frost Advisory | LOX | 9 hr | |
| Dec 5, 2:56 PM PST | Frost Advisory | EKA | Del Norte, Humboldt | 18 hr |
| Dec 6, 2:15 PM PST | Frost Advisory | EKA | Del Norte, Humboldt | 19 hr |
| Dec 12, 8:28 PM PST | Frost Advisory | LOX | 13 hr | |
| Dec 21, 7:44 PM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 12 hr |
| Dec 25, 2:52 AM PST | Frost Advisory | EKA | Humboldt, Mendocino | 30 hr |
| Dec 27, 11:28 AM PST | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 22 hr |
| Dec 27, 2:53 PM PST | Frost Advisory | LOX | 17 hr | |
| Dec 28, 12:13 PM PST | Frost Advisory | SGX | Riverside, San Bernardino, San Diego | 44 hr |
| Dec 28, 12:42 PM PST | Frost Advisory | LOX | Los Angeles | 19 hr |
| Dec 28, 3:08 PM PST | Frost Advisory | EKA | Humboldt, Mendocino | 18 hr |
| Dec 29, 3:07 PM PST | Frost Advisory | LOX | 18 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Mendocino County30
- Humboldt County29
- Del Norte County20
- Riverside County7
- Los Angeles County7
- San Bernardino County6
- Trinity County6
- Siskiyou County5
- San Diego County4
- Monterey County4
- Marin County2
- Sonoma County2
- Modoc County2
- Orange County1
- Alameda County1
- Contra Costa County1
- San Mateo County1
- Santa Clara County1
- Santa Cruz County1
- Napa County1
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.