Alert archive / California / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in California, 2025

217 severe thunderstorm warnings 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 severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in 2025. Tap one for its archive.

Severe Thunderstorm Warnings: 217
Busiest month: July65 severe thunderstorm warnings
Busiest day: August 25, 202514 severe thunderstorm warnings

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

38 of 217 severe thunderstorm warnings covering California in 2025 had a qualifying storm report inside them; 73 of 198 hail, wind and damage reports fell inside a warning, on average 22 minutes after it went out.

California, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	217	38	82%	198	37%	22 min

Each office's whole area, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Los Angeles, CA: severe thunderstorm warnings	17	7	59%	103	31%	31 min
NWS Sacramento, CA: severe thunderstorm warnings	16	1	94%	3	33%	0 min
NWS Eureka, CA: severe thunderstorm warnings	11	2	82%	7	29%	17 min
NWS San Diego, CA: severe thunderstorm warnings	8	3	63%	13	23%	3 min
NWS Medford, OR: severe thunderstorm warnings	75	3	96%	12	25%	10 min
NWS Reno, NV: severe thunderstorm warnings	37	3	92%	25	12%	12 min
NWS San Francisco Bay Area, CA: severe thunderstorm warnings	28	9	68%	39	36%	12 min
NWS Las Vegas, NV: severe thunderstorm warnings	68	13	81%	89	39%	22 min
NWS Hanford, CA: severe thunderstorm warnings	16	0	100%	0
NWS Phoenix, AZ: severe thunderstorm warnings	124	35	72%	115	73%	19 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

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 4, 1:36 PM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Marin, Sonoma	39 min
Feb 4, 2:15 PM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Marin	45 min
Feb 4, 3:03 PM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Marin, City and County of San Francisco, San Mateo	27 min
Feb 4, 3:29 PM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Marin, City and County of San Francisco, San Mateo	31 min
Feb 4, 3:59 PM PST	Severe Thunderstorm Warning	MTR	City and County of San Francisco, San Mateo	16 min
Feb 4, 4:24 PM PST	Severe Thunderstorm Warning	MTR	San Mateo, Santa Clara	21 min
Feb 13, 4:08 PM PST	Severe Thunderstorm Warning	LOX	Los Angeles	82 min
Feb 13, 5:01 PM PST	Severe Thunderstorm Warning Considerable damage threat	LOX	Los Angeles	65 min
Mar 2, 2:13 PM PST	Severe Thunderstorm Warning	HNX	Madera, Mariposa, Merced	32 min
Mar 2, 2:25 PM PST	Severe Thunderstorm Warning	HNX	Kern, Tulare	50 min
Mar 5, 2:31 PM PST	Severe Thunderstorm Warning	MTR	Santa Clara	29 min
Mar 5, 2:59 PM PST	Severe Thunderstorm Warning	MTR	San Benito, Santa Clara	31 min
Mar 12, 2:17 PM PDT	Severe Thunderstorm Warning	MTR	City and County of San Francisco, San Mateo	28 min
Mar 12, 2:36 PM PDT	Severe Thunderstorm Warning	MTR	San Mateo, Santa Clara, Santa Cruz	24 min
Mar 12, 2:43 PM PDT	Severe Thunderstorm Warning	MTR	Santa Cruz	21 min
Mar 12, 2:49 PM PDT	Severe Thunderstorm Warning	MTR	Santa Cruz	11 min
Mar 12, 3:00 PM PDT	Severe Thunderstorm Warning	MTR	San Mateo, Santa Clara, Santa Cruz	15 min
Mar 12, 3:23 PM PDT	Severe Thunderstorm Warning	MTR	Monterey	22 min
Mar 12, 8:01 PM PDT	Severe Thunderstorm Warning	LOX	Santa Barbara	89 min
Mar 13, 12:29 AM PDT	Severe Thunderstorm Warning	LOX	Ventura	31 min
Mar 13, 2:44 PM PDT	Severe Thunderstorm Warning	HNX	Kern	16 min
Mar 13, 3:47 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Kings, Tulare	28 min
Mar 13, 4:11 PM PDT	Severe Thunderstorm Warning	HNX	Kern, Kings, Tulare	49 min
Mar 13, 4:13 PM PDT	Severe Thunderstorm Warning	HNX	Kings, Tulare	17 min
Mar 13, 4:23 PM PDT	Severe Thunderstorm Warning	HNX	Kern, Tulare	37 min
Mar 17, 2:57 PM PDT	Severe Thunderstorm Warning	STO	Stanislaus, Tuolumne	24 min
Mar 17, 3:35 PM PDT	Severe Thunderstorm Warning	STO	Butte, Glenn, Tehama	40 min
Mar 17, 4:29 PM PDT	Severe Thunderstorm Warning	STO	Butte, Glenn, Tehama	46 min
Mar 17, 4:55 PM PDT	Severe Thunderstorm Warning	HNX	Kings, Tulare	35 min
Mar 17, 5:25 PM PDT	Severe Thunderstorm Warning	HNX	Kings, Tulare	18 min
May 6, 3:42 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	48 min
May 6, 4:25 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	50 min
May 12, 3:20 PM PDT	Severe Thunderstorm Warning	STO	Tehama	40 min
May 24, 6:59 PM PDT	Severe Thunderstorm Warning	HNX	Madera, Mariposa	32 min
May 31, 5:12 PM PDT	Severe Thunderstorm Warning	LOX	Santa Barbara, Ventura	48 min
Jun 3, 2:30 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	45 min
Jun 3, 3:12 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	48 min
Jun 3, 4:26 PM PDT	Severe Thunderstorm Warning	SGX	San Bernardino	64 min
Jun 3, 5:17 PM PDT	Severe Thunderstorm Warning	PSR	Riverside, San Bernardino	43 min
Jun 3, 5:19 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	41 min
Jun 5, 9:23 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	52 min
Jun 7, 5:45 PM PDT	Severe Thunderstorm Warning	STO	Tuolumne	36 min
Jun 8, 3:55 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Madera	35 min
Jun 9, 6:05 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	40 min
Jun 10, 1:47 PM PDT	Severe Thunderstorm Warning	MFR	Modoc	28 min
Jun 10, 4:27 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	33 min
Jun 10, 4:31 PM PDT	Severe Thunderstorm Warning	REV	Lassen	29 min
Jun 10, 4:57 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	48 min
Jun 10, 9:05 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	40 min
Jun 30, 4:44 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	46 min
Jun 30, 5:42 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	33 min
Jun 30, 6:35 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	25 min
Jul 1, 2:28 PM PDT	Severe Thunderstorm Warning	REV	Lassen	32 min
Jul 1, 4:11 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	34 min
Jul 1, 4:30 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	11 min
Jul 1, 5:01 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	44 min
Jul 1, 6:40 PM PDT	Severe Thunderstorm Warning	STO	Shasta	32 min
Jul 2, 3:41 PM PDT	Severe Thunderstorm Warning	REV	Alpine, El Dorado, Placer	34 min
Jul 2, 4:49 PM PDT	Severe Thunderstorm Warning	MFR	Modoc, Siskiyou	41 min
Jul 2, 6:03 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	42 min
Jul 2, 7:09 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	36 min
Jul 2, 9:16 PM PDT	Severe Thunderstorm Warning	VEF	Inyo	44 min
Jul 2, 9:51 PM PDT	Severe Thunderstorm Warning Considerable damage threat	VEF	Inyo	39 min
Jul 3, 4:03 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	27 min
Jul 3, 4:16 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Modoc	29 min
Jul 3, 4:20 PM PDT	Severe Thunderstorm Warning	MFR	Modoc	25 min
Jul 3, 4:22 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	23 min
Jul 3, 4:26 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	20 min
Jul 3, 4:30 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Modoc	45 min
Jul 3, 4:43 PM PDT	Severe Thunderstorm Warning	MFR	Modoc	32 min
Jul 3, 4:48 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	27 min
Jul 3, 5:07 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Modoc	13 min
Jul 3, 5:12 PM PDT	Severe Thunderstorm Warning	MFR	Modoc	33 min
Jul 3, 5:15 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	30 min
Jul 3, 5:40 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	35 min
Jul 3, 5:44 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	31 min
Jul 3, 6:08 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	37 min
Jul 3, 6:15 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	30 min
Jul 3, 7:17 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	28 min
Jul 3, 8:40 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	35 min
Jul 7, 6:16 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	29 min
Jul 7, 7:23 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	37 min
Jul 7, 8:13 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	32 min
Jul 16, 4:42 PM PDT	Severe Thunderstorm Warning	REV	Mono	10 min
Jul 24, 3:33 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	27 min
Jul 24, 4:03 PM PDT	Severe Thunderstorm Warning	MFR	Modoc, Siskiyou	27 min
Jul 24, 4:24 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	51 min
Jul 24, 4:29 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	31 min
Jul 24, 5:26 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	49 min
Jul 24, 6:09 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	36 min
Jul 25, 1:48 PM PDT	Severe Thunderstorm Warning	REV	Alpine, Mono	27 min
Jul 25, 2:35 PM PDT	Severe Thunderstorm Warning	REV	Plumas, Sierra	25 min
Jul 25, 2:37 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	38 min
Jul 25, 2:52 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	23 min
Jul 25, 3:05 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	40 min
Jul 25, 3:23 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	37 min
Jul 25, 3:27 PM PDT	Severe Thunderstorm Warning	STO	Plumas	33 min
Jul 25, 3:48 PM PDT	Severe Thunderstorm Warning Considerable damage threat	STO	Butte, Plumas	27 min
Jul 25, 3:58 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	47 min
Jul 25, 4:28 PM PDT	Severe Thunderstorm Warning	REV	Nevada, Placer	32 min
Jul 25, 5:20 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	40 min
Jul 25, 5:35 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	20 min
Jul 26, 3:36 PM PDT	Severe Thunderstorm Warning	REV	Plumas	24 min
Jul 27, 5:10 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	35 min
Jul 27, 8:48 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Sierra	8 min
Jul 29, 4:06 PM PDT	Severe Thunderstorm Warning	MFR	Modoc	37 min
Jul 30, 2:30 AM PDT	Severe Thunderstorm Warning	STO	Alpine, Amador, Calaveras, El Dorado, Tuolumne	30 min
Jul 30, 2:32 AM PDT	Severe Thunderstorm Warning	STO	Calaveras, Tuolumne	28 min
Jul 30, 4:29 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	24 min
Jul 30, 4:41 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	48 min
Jul 30, 5:10 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	50 min
Jul 30, 5:17 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	28 min
Jul 30, 5:28 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	36 min
Jul 30, 5:43 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	13 min
Jul 30, 6:05 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	40 min
Jul 31, 5:58 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	32 min
Jul 31, 6:11 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	49 min
Jul 31, 7:52 PM PDT	Severe Thunderstorm Warning	STO	Shasta	23 min
Aug 1, 3:13 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	32 min
Aug 1, 5:13 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	47 min
Aug 1, 5:53 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	52 min
Aug 10, 3:33 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	42 min
Aug 12, 3:41 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas, Sierra	18 min
Aug 22, 4:45 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	45 min
Aug 23, 1:46 PM PDT	Severe Thunderstorm Warning	REV	El Dorado, Placer	29 min
Aug 23, 2:23 PM PDT	Severe Thunderstorm Warning	REV	Nevada, Sierra	37 min
Aug 23, 2:42 PM PDT	Severe Thunderstorm Warning	REV	Nevada, Placer	48 min
Aug 23, 3:05 PM PDT	Severe Thunderstorm Warning	REV	Sierra	27 min
Aug 24, 1:58 PM PDT	Severe Thunderstorm Warning	REV	Plumas	32 min
Aug 24, 2:37 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Sierra	23 min
Aug 24, 2:49 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	26 min
Aug 24, 3:06 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Sierra	24 min
Aug 24, 3:14 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	31 min
Aug 24, 3:44 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	31 min
Aug 25, 1:23 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	52 min
Aug 25, 1:25 PM PDT	Severe Thunderstorm Warning	HNX	Tulare	35 min
Aug 25, 1:39 PM PDT	Severe Thunderstorm Warning	SGX	San Diego	50 min
Aug 25, 1:57 PM PDT	Severe Thunderstorm Warning	HNX	Fresno	27 min
Aug 25, 2:04 PM PDT	Severe Thunderstorm Warning Considerable damage threat	SGX	San Diego	44 min
Aug 25, 2:08 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	52 min
Aug 25, 2:11 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	49 min
Aug 25, 2:28 PM PDT	Severe Thunderstorm Warning	SGX	Riverside	62 min
Aug 25, 2:37 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	38 min
Aug 25, 2:38 PM PDT	Severe Thunderstorm Warning	LOX	Los Angeles	52 min
Aug 25, 2:42 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	33 min
Aug 25, 2:47 PM PDT	Severe Thunderstorm Warning	SGX	San Diego	58 min
Aug 25, 3:06 PM PDT	Severe Thunderstorm Warning	SGX	Riverside	54 min
Aug 25, 3:12 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	48 min
Aug 25, 5:01 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	44 min
Aug 26, 12:48 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	27 min
Aug 26, 2:11 PM PDT	Severe Thunderstorm Warning	SGX	San Bernardino	64 min
Aug 26, 2:37 PM PDT	Severe Thunderstorm Warning	LOX	Los Angeles	53 min
Aug 26, 2:37 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	38 min
Aug 26, 3:58 PM PDT	Severe Thunderstorm Warning	HNX	Kern	32 min
Aug 26, 4:06 PM PDT	Severe Thunderstorm Warning	VEF	Inyo, San Bernardino	54 min
Aug 26, 5:30 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	30 min
Aug 26, 6:04 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	26 min
Aug 26, 6:29 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	31 min
Aug 26, 6:47 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	28 min
Aug 26, 6:54 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	36 min
Aug 26, 8:05 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	40 min
Aug 27, 1:53 PM PDT	Severe Thunderstorm Warning	REV	Nevada, Placer, Sierra	37 min
Aug 27, 2:14 PM PDT	Severe Thunderstorm Warning	REV	Nevada, Sierra	31 min
Aug 27, 4:31 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	44 min
Aug 27, 4:55 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	50 min
Sep 2, 2:48 PM PDT	Severe Thunderstorm Warning	STO	El Dorado, Placer	27 min
Sep 2, 3:33 PM PDT	Severe Thunderstorm Warning	STO	Nevada, Placer, Sierra, Yuba	27 min
Sep 2, 4:11 PM PDT	Severe Thunderstorm Warning	LOX	Ventura	64 min
Sep 2, 4:22 PM PDT	Severe Thunderstorm Warning	STO	Butte, Nevada, Plumas, Sierra, Yuba	23 min
Sep 4, 2:10 PM PDT	Severe Thunderstorm Warning	PSR	Imperial, Riverside	50 min
Sep 4, 7:30 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	45 min
Sep 4, 7:44 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	46 min
Sep 4, 8:15 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	45 min
Sep 17, 2:30 PM PDT	Severe Thunderstorm Warning	PSR	Riverside	45 min
Sep 17, 2:45 PM PDT	Severe Thunderstorm Warning	PSR	Riverside	24 min
Sep 17, 3:22 PM PDT	Severe Thunderstorm Warning	PSR	Imperial, Riverside	38 min
Sep 18, 12:48 PM PDT	Severe Thunderstorm Warning	PSR	Imperial, Riverside	57 min
Sep 18, 1:10 PM PDT	Severe Thunderstorm Warning	PSR	Riverside	50 min
Sep 18, 3:28 PM PDT	Severe Thunderstorm Warning	HNX	Kern	28 min
Sep 18, 4:32 PM PDT	Severe Thunderstorm Warning	SGX	Riverside, San Bernardino	58 min
Sep 18, 5:47 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	28 min
Sep 18, 6:08 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	37 min
Sep 18, 6:31 PM PDT	Severe Thunderstorm Warning	PSR	Imperial, Riverside	29 min
Sep 18, 6:46 PM PDT	Severe Thunderstorm Warning	PSR	Imperial, Riverside	29 min
Sep 18, 6:56 PM PDT	Severe Thunderstorm Warning	PSR	Imperial	19 min
Sep 18, 8:42 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	48 min
Sep 26, 2:23 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	52 min
Oct 10, 3:17 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	43 min
Oct 13, 8:27 AM PDT	Severe Thunderstorm Warning	PSR	Riverside	27 min
Oct 13, 8:52 AM PDT	Severe Thunderstorm Warning	PSR	Riverside	38 min
Oct 13, 9:29 AM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	46 min
Oct 13, 11:12 PM PDT	Severe Thunderstorm Warning	LOX	San Luis Obispo	93 min
Oct 14, 12:38 AM PDT	Severe Thunderstorm Warning	LOX	Santa Barbara	52 min
Oct 14, 3:04 AM PDT	Severe Thunderstorm Warning	LOX	Santa Barbara	86 min
Oct 14, 8:04 AM PDT	Severe Thunderstorm Warning	LOX	Los Angeles	71 min
Oct 14, 9:09 AM PDT	Severe Thunderstorm Warning	LOX	Los Angeles	83 min
Oct 14, 1:36 PM PDT	Severe Thunderstorm Warning	MTR	Monterey	24 min
Oct 14, 3:59 PM PDT	Severe Thunderstorm Warning	HNX	Kern, Tulare	31 min
Nov 21, 1:06 AM PST	Severe Thunderstorm Warning	LOX	Los Angeles	28 min
Dec 24, 2:43 AM PST	Severe Thunderstorm Warning	MTR	San Mateo, Santa Clara, Santa Cruz	32 min
Dec 24, 3:04 AM PST	Severe Thunderstorm Warning	MTR	Alameda, Santa Clara	22 min
Dec 24, 6:53 AM PST	Severe Thunderstorm Warning	LOX	Los Angeles, Ventura	97 min
Dec 24, 10:15 AM PST	Severe Thunderstorm Warning	LOX	Los Angeles	30 min
Dec 24, 6:06 PM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Monterey	24 min
Dec 24, 6:20 PM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Monterey	16 min
Dec 25, 2:19 AM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	City and County of San Francisco, San Mateo	26 min
Dec 25, 2:48 AM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	San Mateo, Santa Cruz	27 min
Dec 25, 3:12 AM PST	Severe Thunderstorm Warning Considerable damage threat	MTR	Alameda, San Mateo, Santa Clara, Santa Cruz	33 min
Dec 25, 5:08 AM PST	Severe Thunderstorm Warning Considerable damage threat	STO	Butte, Plumas, Sierra, Tehama, Yuba	37 min
Dec 25, 8:51 AM PST	Severe Thunderstorm Warning	LOX	Los Angeles	24 min
Dec 25, 2:15 PM PST	Severe Thunderstorm Warning	STO	El Dorado, Placer, Sacramento	45 min
Dec 25, 5:37 PM PST	Severe Thunderstorm Warning	MTR	Marin, City and County of San Francisco	23 min
Dec 25, 6:12 PM PST	Severe Thunderstorm Warning	MTR	Monterey	33 min
Dec 25, 6:35 PM PST	Severe Thunderstorm Warning	MTR	San Mateo, Santa Clara	8 min
Dec 25, 6:54 PM PST	Severe Thunderstorm Warning	MTR	Monterey	36 min
Dec 25, 7:13 PM PST	Severe Thunderstorm Warning	MTR	Monterey	19 min
Dec 25, 7:35 PM PST	Severe Thunderstorm Warning	MTR	Monterey	25 min

By county

Every county with at least one alert. A county page lists each alert that covered it.

6 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2024 2026

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.