Alert archive / California / Frost Advisories

Frost Advisories in California, 2020

78 frost advisories in 2020. 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 2020. Tap one for its archive.

Frost Advisories: 78
Busiest month: November24 frost advisories
Busiest day: November 9, 20205 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
Feb 2, 1:13 PM PST	Frost Advisory	LOX		20 hr
Feb 4, 2:02 PM PST	Frost Advisory	LOX	Los Angeles	19 hr
Feb 5, 3:41 AM PST	Frost Advisory	SGX	Orange, San Diego	4 hr
Feb 5, 2:16 PM PST	Frost Advisory	LOX		19 hr
Feb 29, 2:13 PM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	19 hr
Mar 1, 2:42 PM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	18 hr
Mar 3, 4:45 AM PST	Frost Advisory	EKA	Mendocino	4 hr
Mar 3, 1:33 PM PST	Frost Advisory	EKA	Lake, Mendocino	19 hr
Mar 4, 2:05 PM PST	Frost Advisory	EKA	Lake, Mendocino	19 hr
Mar 7, 2:10 PM PST	Frost Advisory	EKA	Mendocino	19 hr
Mar 9, 5:28 AM PDT	Frost Advisory	EKA	Lake, Mendocino	28 hr
Mar 10, 3:36 PM PDT	Frost Advisory	EKA	Lake, Mendocino	17 hr
Mar 15, 4:31 AM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	28 hr
Mar 18, 4:24 AM PDT	Frost Advisory	EKA	Lake, Mendocino	23 hr
Mar 20, 2:39 PM PDT	Frost Advisory	EKA	Lake, Mendocino	18 hr
Mar 21, 2:10 PM PDT	Frost Advisory	EKA	Lake, Mendocino	19 hr
Mar 22, 2:21 PM PDT	Frost Advisory	EKA	Lake, Mendocino	19 hr
Mar 24, 8:54 AM PDT	Frost Advisory	EKA	Mendocino	24 hr
Mar 25, 2:43 AM PDT	Frost Advisory	MTR	Marin, Napa, Sonoma	30 hr
Mar 25, 1:37 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	19 hr
Mar 26, 1:02 PM PDT	Frost Advisory	MTR	Marin, Napa, Sonoma	20 hr
Mar 26, 3:52 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	17 hr
Apr 1, 3:23 AM PDT	Frost Advisory	EKA	Del Norte, Lake, Mendocino	6 hr
Apr 1, 9:25 AM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino	24 hr
Apr 2, 2:08 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino	19 hr
Apr 5, 10:21 AM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	22 hr
Apr 6, 2:13 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino	19 hr
Apr 13, 3:10 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	17 hr
May 2, 1:20 PM PDT	Frost Advisory	EKA	Lake, Mendocino, Trinity	20 hr
May 3, 1:42 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino, Trinity	19 hr
May 3, 1:51 PM PDT	Frost Advisory	MFR	Siskiyou	19 hr
May 6, 5:59 PM PDT	Frost Advisory	MFR	Siskiyou	15 hr
Jun 7, 4:03 AM PDT	Frost Advisory	EKA	Humboldt, Lake, Trinity	28 hr
Jun 7, 3:57 PM PDT	Frost Advisory	MFR	Siskiyou	16 hr
Jun 16, 2:19 AM PDT	Frost Advisory	MFR	Modoc, Siskiyou	30 hr
Jul 1, 9:08 PM PDT	Frost Advisory	MFR	Modoc, Siskiyou	11 hr
Sep 8, 3:23 AM PDT	Frost Advisory	MFR	Modoc	29 hr
Oct 8, 9:30 PM PDT	Frost Advisory	MFR	Siskiyou	12 hr
Oct 11, 1:19 PM PDT	Frost Advisory	EKA	Trinity	19 hr
Oct 14, 2:53 PM PDT	Frost Advisory	MFR	Siskiyou	18 hr
Oct 15, 2:26 PM PDT	Frost Advisory	MFR	Siskiyou	19 hr
Oct 22, 2:07 PM PDT	Frost Advisory	EKA	Mendocino	19 hr
Oct 23, 12:08 PM PDT	Frost Advisory	EKA	Mendocino, Trinity	20 hr
Oct 24, 11:45 AM PDT	Frost Advisory	EKA	Lake, Mendocino	20 hr
Oct 25, 4:44 AM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	28 hr
Oct 25, 2:11 PM PDT	Frost Advisory	SGX	San Bernardino	19 hr
Oct 26, 3:37 AM PDT	Frost Advisory	SGX	San Bernardino	28 hr
Oct 26, 2:45 PM PDT	Frost Advisory	EKA	Humboldt, Mendocino	17 hr
Oct 27, 2:55 PM PDT	Frost Advisory	EKA	Humboldt, Mendocino	17 hr
Oct 28, 12:47 PM PDT	Frost Advisory	EKA	Humboldt, Mendocino	19 hr
Oct 29, 1:22 PM PDT	Frost Advisory	EKA	Humboldt	19 hr
Nov 7, 1:54 PM PST	Frost Advisory	LOX		18 hr
Nov 8, 1:57 AM PST	Frost Advisory	STO		9 hr
Nov 8, 3:05 AM PST	Frost Advisory	EKA	Del Norte, Mendocino	30 hr
Nov 8, 4:49 AM PST	Frost Advisory	MTR	Marin, Monterey, Napa, San Benito, Sonoma	28 hr
Nov 8, 8:21 AM PST	Frost Advisory	LOX	Los Angeles	24 hr
Nov 9, 3:23 AM PST	Frost Advisory	SGX	Riverside, San Bernardino	5 hr
Nov 9, 3:23 AM PST	Frost Advisory	SGX	Riverside, San Bernardino	29 hr
Nov 9, 8:48 AM PST	Frost Advisory	MTR	Monterey, San Benito	24 hr
Nov 9, 12:13 PM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	21 hr
Nov 9, 12:57 PM PST	Frost Advisory	LOX	Los Angeles	20 hr
Nov 10, 3:16 AM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	30 hr
Nov 10, 12:43 PM PST	Frost Advisory	MTR	Marin, Monterey, Napa, Sonoma	20 hr
Nov 19, 2:39 PM PST	Frost Advisory	EKA	Del Norte	18 hr
Nov 20, 9:40 AM PST	Frost Advisory	EKA	Del Norte	23 hr
Nov 21, 2:22 PM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	19 hr
Nov 25, 2:06 PM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	19 hr
Nov 26, 2:05 PM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	19 hr
Nov 27, 2:05 PM PST	Frost Advisory	LOX		19 hr
Nov 27, 2:51 PM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	18 hr
Nov 28, 2:07 PM PST	Frost Advisory	LOX		19 hr
Nov 28, 2:43 PM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	18 hr
Nov 29, 2:52 PM PST	Frost Advisory	EKA	Mendocino	18 hr
Nov 29, 8:53 PM PST	Frost Advisory	LOX		8 hr
Nov 30, 3:05 AM PST	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	24 hr
Dec 3, 8:53 PM PST	Frost Advisory	LOX		12 hr
Dec 16, 2:16 AM PST	Frost Advisory	LOX		7 hr
Dec 29, 1:57 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.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2019 2021

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.