Alert archive / California / Winter Weather Advisories

Winter Weather Advisories in California, 2021

146 winter weather advisories in 2021. 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 winter weather advisories reaches back to 2005.

Winter Weather Advisories by county

Each county as a circle sized by its count in 2021. Tap one for its archive.

Winter Weather Advisories: 146
Busiest month: December40 winter weather advisories
Busiest day: December 28, 20216 winter weather 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 1, 12:43 PM PST	Winter Weather Advisory	MFR	Siskiyou	9 hr
Jan 1, 2:09 PM PST	Winter Weather Advisory	EKA		8 hr
Jan 2, 10:21 AM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more	60 hr
Jan 2, 12:21 PM PST	Winter Weather Advisory	HNX		57 hr
Jan 5, 3:40 AM PST	Winter Weather Advisory	EKA		34 hr
Jan 6, 2:41 PM PST	Winter Weather Advisory	EKA		43 hr
Jan 7, 2:38 AM PST	Winter Weather Advisory	MFR	Siskiyou	31 hr
Jan 19, 4:53 AM PST	Winter Weather Advisory	SGX	Riverside, San Bernardino	16 hr
Jan 21, 5:45 PM PST	Winter Weather Advisory	SGX	Riverside, San Bernardino, San Diego	60 hr
Jan 22, 3:32 AM PST	Winter Weather Advisory	STO		18 hr
Jan 22, 10:47 AM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Trinity	56 hr
Jan 22, 2:04 PM PST	Winter Weather Advisory	MFR	Siskiyou	68 hr
Jan 23, 1:26 AM PST	Winter Weather Advisory	HNX		63 hr
Jan 23, 2:26 AM PST	Winter Weather Advisory	STO		55 hr
Jan 23, 2:35 AM PST	Winter Weather Advisory	VEF	Inyo	3 days
Jan 23, 3:40 AM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more	3 days
Jan 23, 11:13 PM PST	Winter Weather Advisory	LOX		4 hr
Jan 24, 10:12 AM PST	Winter Weather Advisory	SGX	Orange, Riverside, San Bernardino, San Diego	44 hr
Jan 24, 8:13 PM PST	Winter Weather Advisory	LOX	Santa Barbara	26 hr
Jan 25, 5:23 AM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	3 days
Jan 25, 12:30 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Nevada, Placer	16 hr
Jan 25, 1:44 PM PST	Winter Weather Advisory	VEF	Inyo	4 days
Jan 25, 3:00 PM PST	Winter Weather Advisory	EKA		3 hr
Jan 27, 3:53 AM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino, Trinity	34 hr
Jan 27, 4:09 AM PST	Winter Weather Advisory	MFR	Siskiyou	5 hr
Jan 27, 1:14 PM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	30 hr
Jan 28, 2:01 AM PST	Winter Weather Advisory	STO		14 hr
Jan 28, 3:07 AM PST	Winter Weather Advisory	SGX	San Diego	39 hr
Jan 29, 3:11 PM PST	Winter Weather Advisory	MFR	Siskiyou	49 hr
Jan 31, 2:07 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more	58 hr
Jan 31, 2:46 PM PST	Winter Weather Advisory	MFR	Siskiyou	31 hr
Feb 1, 1:46 AM PST	Winter Weather Advisory	HNX		47 hr
Feb 1, 3:09 PM PST	Winter Weather Advisory	MFR	Siskiyou	44 hr
Feb 1, 11:56 PM PST	Winter Weather Advisory	EKA		4 hr
Feb 2, 4:04 AM PST	Winter Weather Advisory	EKA	Humboldt, Trinity	31 hr
Feb 2, 12:25 PM PST	Winter Weather Advisory	REV	Lassen, Plumas, Sierra	14 hr
Feb 2, 2:26 PM PST	Winter Weather Advisory	STO		21 hr
Feb 3, 2:30 AM PST	Winter Weather Advisory	STO		12 hr
Feb 10, 12:22 PM PST	Winter Weather Advisory	HNX		43 hr
Feb 10, 1:09 PM PST	Winter Weather Advisory	STO		39 hr
Feb 10, 1:41 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Mono, Nevada, Placer	38 hr
Feb 11, 2:56 PM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	48 hr
Feb 12, 2:49 AM PST	Winter Weather Advisory	EKA		33 hr
Feb 12, 2:59 AM PST	Winter Weather Advisory	STO		33 hr
Feb 12, 1:26 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Nevada, Placer	23 hr
Feb 13, 10:33 AM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	4 hr
Feb 13, 2:14 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Nevada, Placer	48 hr
Feb 13, 2:15 PM PST	Winter Weather Advisory	STO		48 hr
Feb 14, 4:19 AM PST	Winter Weather Advisory	MFR	Modoc	54 hr
Feb 17, 2:55 AM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	46 hr
Feb 17, 3:43 AM PST	Winter Weather Advisory	EKA		43 hr
Feb 19, 2:27 AM PST	Winter Weather Advisory	STO		18 hr
Feb 19, 2:35 PM PST	Winter Weather Advisory	MFR	Siskiyou	19 hr
Feb 19, 4:49 PM PST	Winter Weather Advisory	EKA	Humboldt, Trinity	14 hr
Feb 19, 8:05 PM PST	Winter Weather Advisory	STO		14 hr
Feb 20, 2:37 AM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Nevada, Placer	7 hr
Mar 2, 12:25 PM PST	Winter Weather Advisory	SGX	Riverside, San Bernardino, San Diego	34 hr
Mar 2, 1:55 PM PST	Winter Weather Advisory	LOX		31 hr
Mar 4, 2:12 PM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino, Trinity	36 hr
Mar 4, 2:16 PM PST	Winter Weather Advisory	STO		40 hr
Mar 4, 2:49 PM PST	Winter Weather Advisory	MFR	Siskiyou	37 hr
Mar 7, 1:02 PM PST	Winter Weather Advisory	STO		25 hr
Mar 7, 1:53 PM PST	Winter Weather Advisory	MFR	Siskiyou	68 hr
Mar 7, 2:09 PM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino, Trinity	68 hr
Mar 8, 2:45 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more	52 hr
Mar 9, 2:30 AM PST	Winter Weather Advisory	STO		25 hr
Mar 10, 3:52 AM PST	Winter Weather Advisory	STO		6 hr
Mar 10, 10:10 AM PST	Winter Weather Advisory	EKA	Lake, Mendocino, Trinity	6 hr
Mar 10, 2:22 PM PST	Winter Weather Advisory	SGX	Orange, Riverside, San Bernardino, San Diego	20 hr
Mar 11, 2:06 PM PST	Winter Weather Advisory	SGX	Orange, Riverside, San Bernardino, San Diego	13 hr
Mar 12, 10:21 PM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	66 hr
Mar 13, 4:13 AM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino, Trinity	50 hr
Mar 13, 12:17 PM PST	Winter Weather Advisory	HNX		65 hr
Mar 13, 1:51 PM PST	Winter Weather Advisory	STO		45 hr
Mar 14, 3:32 AM PDT	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Modoc, Mono, Nevada and 3 more	37 hr
Mar 14, 12:31 PM PDT	Winter Weather Advisory	LOX		39 hr
Mar 14, 1:01 PM PDT	Winter Weather Advisory	SGX	Riverside, San Bernardino, San Diego	38 hr
Mar 17, 11:52 AM PDT	Winter Weather Advisory	MFR	Siskiyou	35 hr
Mar 17, 2:00 PM PDT	Winter Weather Advisory	STO		58 hr
Mar 18, 3:29 AM PDT	Winter Weather Advisory	HNX		50 hr
Mar 18, 5:04 PM PDT	Winter Weather Advisory	EKA		6 hr
Apr 23, 9:27 AM PDT	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more	65 hr
Apr 23, 11:30 AM PDT	Winter Weather Advisory	HNX		57 hr
Apr 23, 2:47 PM PDT	Winter Weather Advisory	EKA		56 hr
Apr 24, 1:55 PM PDT	Winter Weather Advisory	MFR	Modoc, Siskiyou	24 hr
Apr 25, 7:04 PM PDT	Winter Weather Advisory	MFR	Modoc	18 hr
Apr 25, 8:35 PM PDT	Winter Weather Advisory	HNX		8 hr
May 18, 1:00 PM PDT	Winter Weather Advisory	MFR	Modoc	43 hr
May 18, 2:04 PM PDT	Winter Weather Advisory	REV	Lassen, Modoc, Plumas, Sierra	44 hr
May 18, 2:17 PM PDT	Winter Weather Advisory	STO		52 hr
May 19, 2:15 AM PDT	Winter Weather Advisory	STO		44 hr
May 20, 2:37 AM PDT	Winter Weather Advisory	REV	Alpine, El Dorado, Nevada, Placer	19 hr
Oct 7, 1:28 PM PDT	Winter Weather Advisory	HNX	Madera, Mariposa, Tuolumne	25 hr
Oct 16, 12:29 PM PDT	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Modoc, Mono, Nevada and 3 more	48 hr
Oct 16, 12:30 PM PDT	Winter Weather Advisory	STO		45 hr
Oct 17, 3:13 AM PDT	Winter Weather Advisory	MFR	Modoc	32 hr
Oct 17, 9:19 AM PDT	Winter Weather Advisory	HNX	Fresno, Madera, Mariposa, Tuolumne	20 hr
Oct 18, 2:10 PM PDT	Winter Weather Advisory	EKA		45 hr
Oct 19, 8:54 AM PDT	Winter Weather Advisory	MFR	Siskiyou	21 hr
Nov 6, 2:11 AM PDT	Winter Weather Advisory	REV	Alpine, El Dorado, Nevada, Placer	16 hr
Nov 6, 2:30 AM PDT	Winter Weather Advisory	STO		15 hr
Nov 7, 2:01 AM PST	Winter Weather Advisory	MFR	Siskiyou	53 hr
Nov 7, 3:35 AM PST	Winter Weather Advisory	EKA	Trinity	24 hr
Nov 7, 12:52 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Mono, Nevada, Placer	45 hr
Nov 7, 1:02 PM PST	Winter Weather Advisory	HNX	Fresno, Madera, Mariposa, Tulare, Tuolumne	47 hr
Nov 7, 1:28 PM PST	Winter Weather Advisory	STO		42 hr
Dec 7, 12:33 PM PST	Winter Weather Advisory	HNX	Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne	50 hr
Dec 7, 1:16 PM PST	Winter Weather Advisory	STO		46 hr
Dec 7, 2:16 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Modoc, Mono, Nevada and 3 more	45 hr
Dec 10, 3:52 PM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	4 days
Dec 12, 3:20 PM PST	Winter Weather Advisory	REV	Modoc	43 hr
Dec 12, 5:27 PM PST	Winter Weather Advisory	EKA	Lake, Mendocino	35 hr
Dec 13, 2:26 PM PST	Winter Weather Advisory	HNX	Kern	34 hr
Dec 14, 1:41 PM PST	Winter Weather Advisory	REV	Lassen, Modoc, Mono, Plumas, Sierra	47 hr
Dec 14, 2:12 PM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	43 hr
Dec 14, 2:21 PM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino	26 hr
Dec 15, 8:04 AM PST	Winter Weather Advisory	HNX	Mariposa	26 hr
Dec 15, 10:09 PM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Trinity	8 hr
Dec 19, 12:58 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Lassen, Nevada, Placer, Plumas and 1 more	4 days
Dec 19, 2:03 PM PST	Winter Weather Advisory	EKA	Trinity	56 hr
Dec 20, 2:35 PM PST	Winter Weather Advisory	STO		4 days
Dec 20, 2:59 PM PST	Winter Weather Advisory	HNX	Fresno, Madera, Mariposa, Tulare, Tuolumne	49 hr
Dec 21, 1:00 AM PST	Winter Weather Advisory	VEF	Inyo	3 days
Dec 21, 4:11 AM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	72 hr
Dec 23, 3:01 AM PST	Winter Weather Advisory	SGX	Riverside, San Bernardino	19 hr
Dec 23, 3:22 PM PST	Winter Weather Advisory	MFR	Modoc, Siskiyou	4 days
Dec 25, 3:39 AM PST	Winter Weather Advisory	VEF		24 hr
Dec 25, 3:49 AM PST	Winter Weather Advisory	HNX	Fresno, Kern, Madera, Mariposa, Tulare	28 hr
Dec 25, 5:37 AM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Mendocino	28 hr
Dec 25, 1:40 PM PST	Winter Weather Advisory	SGX	San Diego	16 hr
Dec 26, 3:15 AM PST	Winter Weather Advisory	HNX	Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne	49 hr
Dec 26, 4:37 AM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Mendocino	29 hr
Dec 26, 2:07 PM PST	Winter Weather Advisory	REV	Modoc	29 hr
Dec 27, 2:19 AM PST	Winter Weather Advisory	MFR	Siskiyou	32 hr
Dec 27, 2:22 PM PST	Winter Weather Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino, Trinity	20 hr
Dec 27, 9:07 PM PST	Winter Weather Advisory	STO		6 hr
Dec 27, 9:17 PM PST	Winter Weather Advisory	REV	Alpine, El Dorado, Mono, Nevada, Placer	49 hr
Dec 28, 3:33 AM PST	Winter Weather Advisory	STO		32 hr
Dec 28, 3:40 AM PST	Winter Weather Advisory	HNX	Fresno, Kern, Madera, Mariposa, Tulare, Tuolumne	46 hr
Dec 28, 1:49 PM PST	Winter Weather Advisory	VEF	San Bernardino	45 hr
Dec 28, 2:14 PM PST	Winter Weather Advisory	EKA	Humboldt, Trinity	17 hr
Dec 28, 7:46 PM PST	Winter Weather Advisory	MFR	Siskiyou	14 hr
Dec 29, 3:47 AM PST	Winter Weather Advisory	SGX	San Diego	23 hr
Dec 29, 7:49 PM PST	Winter Weather Advisory	MFR	Modoc	44 hr
Dec 30, 2:00 AM PST	Winter Weather Advisory	HNX	Kern, Tulare	16 hr
Dec 30, 2:50 AM PST	Winter Weather Advisory	SGX	Riverside	9 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 2020 2022

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.