Weather alerts in California, April 2021

179 weather alerts in April 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

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

Alerts: 179
Warnings: 25
Watches: 16
Advisories: 124
Busiest day: April 23, 202115 alerts

Over time

By day

Days in UTC, the clock the archive keeps.

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
Apr 1, 2:37 AM PDT	Small Craft Advisory	EKA		31 hr
Apr 1, 9:17 AM PDT	Beach Hazards Statement	SGX	Orange, San Diego	8 hr
Apr 1, 3:48 PM PDT	Special Weather Statement	PSR	Imperial	27 min
Apr 2, 2:32 PM PDT	Small Craft Advisory	LOX		5 days
Apr 2, 2:36 PM PDT	Frost Advisory	EKA	Humboldt, Mendocino	18 hr
Apr 2, 8:58 PM PDT	Small Craft Advisory	MTR		3 days
Apr 3, 2:05 PM PDT	Frost Advisory	EKA	Humboldt, Lake, Mendocino	19 hr
Apr 3, 2:11 PM PDT	Small Craft Advisory	EKA		3 days
Apr 4, 12:48 AM PDT	Wind Advisory	HNX		51 hr
Apr 4, 1:43 AM PDT	High Wind Watch	SGX	Riverside, San Bernardino, San Diego	12 hr
Apr 4, 2:19 AM PDT	Gale Watch	LOX		19 hr
Apr 4, 2:34 AM PDT	Small Craft Advisory	MTR		48 hr
Apr 4, 3:45 AM PDT	Wind Advisory	LOX		71 hr
Apr 4, 4:00 AM PDT	Dense Fog Advisory	SGX	San Diego	4 hr
Apr 4, 8:33 AM PDT	Dense Fog Advisory	SGX	San Diego	2 hr
Apr 4, 1:27 PM PDT	Wind Advisory	PSR	Imperial	40 hr
Apr 4, 1:28 PM PDT	Wind Advisory	SGX	Riverside, San Bernardino, San Diego	40 hr
Apr 4, 1:49 PM PDT	Wind Advisory	VEF	San Bernardino	33 hr
Apr 4, 2:38 PM PDT	Lake Wind Advisory	REV	Alpine, El Dorado, Nevada, Placer	29 hr
Apr 4, 9:06 PM PDT	Gale Warning	LOX		36 hr
Apr 5, 2:32 AM PDT	Small Craft Advisory	MTR		18 hr
Apr 5, 3:18 AM PDT	Hazardous Seas Warning	EKA		27 hr
Apr 5, 11:06 PM PDT	Small Craft Advisory	LOX		51 hr
Apr 6, 2:42 AM PDT	Small Craft Advisory	MTR		48 hr
Apr 6, 3:27 AM PDT	Frost Advisory	EKA	Humboldt, Mendocino	6 hr
Apr 6, 9:12 AM PDT	Small Craft Advisory	LOX		66 hr
Apr 6, 2:16 PM PDT	High Wind Watch	LOX		37 hr
Apr 6, 2:24 PM PDT	Small Craft Advisory	MTR		6 days
Apr 7, 2:38 AM PDT	Gale Watch	LOX		24 hr
Apr 7, 2:38 AM PDT	Gale Warning	LOX		5 days
Apr 7, 2:43 AM PDT	Gale Warning	MTR		5 days
Apr 7, 2:43 AM PDT	Small Craft Advisory	MTR		48 hr
Apr 7, 2:48 AM PDT	Wind Advisory	SGX	Riverside, San Bernardino, San Diego	45 hr
Apr 7, 2:49 AM PDT	Wind Advisory	LOX	Los Angeles	51 hr
Apr 7, 11:38 AM PDT	Small Craft Advisory	SGX		3 days
Apr 7, 1:16 PM PDT	Wind Advisory	PSR	Imperial	20 hr
Apr 7, 2:12 PM PDT	Small Craft Advisory	EKA		3 days
Apr 8, 1:04 AM PDT	Wind Advisory	HNX		28 hr
Apr 8, 2:20 AM PDT	Small Craft Advisory	LOX		49 hr
Apr 8, 3:07 AM PDT	High Wind Warning	LOX		54 hr
Apr 8, 3:16 AM PDT	Gale Watch	LOX		18 hr
Apr 8, 1:51 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino	19 hr
Apr 8, 9:28 PM PDT	Small Craft Advisory	LOX		5 days
Apr 9, 2:52 AM PDT	Gale Warning	EKA		5 days
Apr 9, 8:49 AM PDT	Small Craft Advisory	MTR		66 hr
Apr 9, 2:20 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	19 hr
Apr 10, 2:20 AM PDT	Wind Advisory	LOX	Los Angeles	25 hr
Apr 10, 2:07 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	19 hr
Apr 10, 2:44 PM PDT	Small Craft Advisory	MTR		3 days
Apr 10, 8:56 PM PDT	Small Craft Advisory	LOX		6 hr
Apr 11, 2:32 AM PDT	Small Craft Advisory	LOX		18 hr
Apr 11, 1:46 PM PDT	Wind Advisory	LOX		10 hr
Apr 11, 2:14 PM PDT	Hazardous Seas Warning	EKA		67 hr
Apr 11, 2:21 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Mendocino	19 hr
Apr 11, 2:52 PM PDT	Fire Weather Watch	VEF	Inyo, San Bernardino, Tulare	23 hr
Apr 11, 8:22 PM PDT	Small Craft Advisory	EKA		30 hr
Apr 12, 2:49 AM PDT	Small Craft Advisory	MTR		48 hr
Apr 12, 2:57 AM PDT	High Wind Watch	VEF	Inyo, San Bernardino	11 hr
Apr 12, 1:25 PM PDT	Wind Advisory	HNX		40 hr
Apr 12, 1:42 PM PDT	Fire Weather Watch	REV	Madera, Mono	30 hr
Apr 12, 1:47 PM PDT	High Wind Warning	VEF	Inyo, San Bernardino	36 hr
Apr 12, 1:47 PM PDT	Wind Advisory	VEF	Inyo, San Bernardino	36 hr
Apr 12, 1:48 PM PDT	Red Flag Warning	VEF	Inyo, San Bernardino, Tulare	32 hr
Apr 12, 2:10 PM PDT	Wind Advisory	STO		25 hr
Apr 12, 2:51 PM PDT	Gale Warning	MTR		36 hr
Apr 12, 8:52 PM PDT	Small Craft Advisory	LOX		30 hr
Apr 13, 1:06 AM PDT	Wind Advisory	PSR	Imperial	49 hr
Apr 13, 4:08 AM PDT	Wind Advisory	SGX	Riverside, San Bernardino, San Diego	46 hr
Apr 13, 6:37 AM PDT	Wind Advisory	LOX		14 hr
Apr 13, 2:46 PM PDT	Frost Advisory	EKA	Humboldt, Mendocino	18 hr
Apr 13, 8:13 PM PDT	Small Craft Advisory	EKA		10 hr
Apr 14, 5:50 AM PDT	Small Craft Advisory	EKA		30 hr
Apr 14, 9:00 AM PDT	Wind Advisory	HNX		14 hr
Apr 14, 2:50 PM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino, Trinity	18 hr
Apr 15, 2:02 PM PDT	Frost Advisory	EKA	Mendocino, Trinity	19 hr
Apr 15, 2:56 PM PDT	Small Craft Advisory	MTR		62 hr
Apr 15, 8:42 PM PDT	Small Craft Advisory	LOX		4 days
Apr 16, 12:12 PM PDT	Wind Advisory	SGX	Orange, Riverside, San Bernardino, San Diego	49 hr
Apr 16, 1:22 PM PDT	Wind Advisory	LOX		14 hr
Apr 16, 8:45 PM PDT	Small Craft Advisory	MTR		24 hr
Apr 17, 2:15 AM PDT	Small Craft Advisory	LOX		19 hr
Apr 17, 1:36 PM PDT	Small Craft Advisory	MTR		4 days
Apr 17, 7:26 PM PDT	Wind Advisory	LOX	Los Angeles	19 hr
Apr 17, 11:24 PM PDT	Dense Fog Advisory	EKA	Del Norte, Humboldt	9 hr
Apr 18, 2:10 AM PDT	Small Craft Advisory	EKA		3 days
Apr 18, 2:25 AM PDT	Small Craft Advisory	LOX		25 hr
Apr 18, 2:43 AM PDT	Small Craft Advisory	MTR		5 days
Apr 18, 2:23 PM PDT	Gale Watch	EKA		12 hr
Apr 18, 2:58 PM PDT	Gale Warning	MTR		4 days
Apr 19, 2:13 AM PDT	Gale Warning	EKA		3 days
Apr 19, 2:17 AM PDT	Dense Fog Advisory	LOX		7 hr
Apr 19, 2:43 AM PDT	Gale Watch	LOX		6 hr
Apr 19, 2:43 AM PDT	Small Craft Advisory	LOX		42 hr
Apr 19, 8:52 AM PDT	Gale Warning	LOX		36 hr
Apr 19, 2:51 PM PDT	Small Craft Advisory	MTR		30 hr
Apr 19, 6:27 PM PDT	Wind Advisory	LOX		15 hr
Apr 20, 1:31 AM PDT	Wind Advisory	PSR	Imperial	51 hr
Apr 20, 2:27 AM PDT	Wind Advisory	LOX		19 hr
Apr 20, 2:32 AM PDT	Small Craft Advisory	LOX		18 hr
Apr 20, 3:44 AM PDT	Wind Advisory	SGX	Riverside, San Diego	49 hr
Apr 20, 1:09 PM PDT	Small Craft Advisory	MTR		56 hr
Apr 20, 2:55 PM PDT	Special Weather Statement	STO	Glenn, Plumas, Shasta, Tehama	110 min
Apr 20, 5:07 PM PDT	Special Weather Statement	STO	Yolo	68 min
Apr 20, 5:23 PM PDT	Special Weather Statement	MTR	Napa	37 min
Apr 20, 6:08 PM PDT	Special Weather Statement	MTR	Napa	52 min
Apr 20, 8:27 PM PDT	Small Craft Advisory	LOX		25 hr
Apr 20, 8:54 PM PDT	Hazardous Seas Warning	EKA		36 hr
Apr 21, 12:54 AM PDT	Wind Advisory	HNX		23 hr
Apr 21, 2:11 AM PDT	Wind Advisory	LOX		43 hr
Apr 21, 10:14 AM PDT	Blowing Dust Advisory	PSR	Imperial, Riverside	10 hr
Apr 21, 2:36 PM PDT	Small Craft Advisory	MTR		54 hr
Apr 21, 5:21 PM PDT	Blowing Dust Advisory	SGX	Riverside, San Diego	3 hr
Apr 22, 3:30 AM PDT	Wind Advisory	HNX		23 hr
Apr 22, 8:44 AM PDT	Small Craft Advisory	EKA		27 hr
Apr 22, 8:44 AM PDT	Hazardous Seas Warning	EKA		9 hr
Apr 22, 12:00 PM PDT	Winter Storm Watch	HNX		24 hr
Apr 22, 12:59 PM PDT	Beach Hazards Statement	LOX	Los Angeles	68 hr
Apr 22, 1:11 PM PDT	Winter Storm Watch	REV	Alpine, El Dorado, Nevada, Placer	20 hr
Apr 22, 2:05 PM PDT	Winter Storm Watch	STO		20 hr
Apr 22, 2:30 PM PDT	Fire Weather Watch	VEF	San Bernardino	22 hr
Apr 22, 7:33 PM PDT	Hazardous Seas Warning	EKA		7 hr
Apr 23, 1:44 AM PDT	Beach Hazards Statement	SGX	Orange	11 hr
Apr 23, 3:15 AM PDT	Wind Advisory	VEF	Inyo, San Bernardino	3 days
Apr 23, 3:31 AM PDT	Lake Wind Advisory	REV	Alpine, El Dorado, Nevada, Placer	47 hr
Apr 23, 3:31 AM PDT	Wind Advisory	REV	Lassen, Modoc, Mono, Plumas, Sierra	43 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, 9:38 AM PDT	Winter Storm Warning	STO		65 hr
Apr 23, 11:30 AM PDT	Winter Storm Warning	HNX		57 hr
Apr 23, 11:30 AM PDT	Winter Weather Advisory	HNX		57 hr
Apr 23, 11:41 AM PDT	Wind Advisory	HNX		54 hr
Apr 23, 12:37 PM PDT	High Surf Advisory	SGX	Orange	62 hr
Apr 23, 12:38 PM PDT	Red Flag Warning	VEF	San Bernardino	55 hr
Apr 23, 1:57 PM PDT	Wind Advisory	SGX	Riverside, San Bernardino, San Diego	61 hr
Apr 23, 2:33 PM PDT	Small Craft Advisory	EKA		39 hr
Apr 23, 2:47 PM PDT	Winter Weather Advisory	EKA		56 hr
Apr 23, 9:02 PM PDT	Small Craft Advisory	LOX		26 hr
Apr 24, 2:43 AM PDT	Small Craft Advisory	MTR		37 hr
Apr 24, 1:40 PM PDT	Small Craft Advisory	MTR		25 hr
Apr 24, 1:55 PM PDT	Winter Weather Advisory	MFR	Modoc, Siskiyou	24 hr
Apr 24, 5:25 PM PDT	Wind Advisory	LOX		30 hr
Apr 25, 1:30 AM PDT	Wind Advisory	PSR	Imperial, Riverside, San Bernardino	25 hr
Apr 25, 2:48 AM PDT	Small Craft Advisory	MTR		4 days
Apr 25, 2:49 PM PDT	Special Weather Statement	STO	Tehama	41 min
Apr 25, 3:49 PM PDT	Special Weather Statement	STO	Tehama	56 min
Apr 25, 4:30 PM PDT	Special Weather Statement	STO	Tehama	60 min
Apr 25, 5:14 PM PDT	Severe Thunderstorm Warning	STO	Tehama	46 min
Apr 25, 7:04 PM PDT	Winter Weather Advisory	MFR	Modoc	18 hr
Apr 25, 7:19 PM PDT	Special Weather Statement	STO	Butte	56 min
Apr 25, 8:35 PM PDT	Winter Weather Advisory	HNX		8 hr
Apr 25, 10:34 PM PDT	Frost Advisory	EKA	Lake, Mendocino, Trinity	10 hr
Apr 26, 1:55 AM PDT	Frost Advisory	EKA	Del Norte, Humboldt, Lake, Mendocino, Trinity	30 hr
Apr 26, 2:22 AM PDT	Small Craft Advisory	LOX		49 hr
Apr 26, 2:35 AM PDT	Wind Advisory	SGX	Riverside, San Diego	21 hr
Apr 26, 2:43 AM PDT	Small Craft Advisory	MTR		48 hr
Apr 26, 12:20 PM PDT	Wind Advisory	HNX		12 hr
Apr 26, 2:10 PM PDT	Freeze Warning	EKA	Lake, Mendocino, Trinity	18 hr
Apr 26, 2:14 PM PDT	Small Craft Advisory	MTR		37 hr
Apr 27, 2:31 AM PDT	Small Craft Advisory	EKA		29 hr
Apr 27, 2:50 AM PDT	Small Craft Advisory	MTR		48 hr
Apr 27, 3:33 AM PDT	Small Craft Advisory	LOX		25 hr
Apr 27, 9:02 AM PDT	Gale Warning	LOX		15 hr
Apr 28, 2:46 AM PDT	Small Craft Advisory	MTR		4 days
Apr 28, 3:42 AM PDT	Small Craft Advisory	LOX		3 days
Apr 28, 6:48 AM PDT	Wind Advisory	LOX		23 hr
Apr 29, 9:22 AM PDT	Gale Watch	LOX		30 hr
Apr 29, 10:59 AM PDT	Beach Hazards Statement	LOX	Los Angeles	4 days
Apr 29, 12:28 PM PDT	Beach Hazards Statement	SGX	Orange	3 days
Apr 29, 2:03 PM PDT	Small Craft Advisory	MTR		31 hr
Apr 30, 1:55 AM PDT	Wind Advisory	HNX		70 hr
Apr 30, 2:36 AM PDT	Wind Advisory	VEF	San Bernardino	51 hr
Apr 30, 2:45 AM PDT	Small Craft Advisory	EKA		5 days
Apr 30, 2:48 AM PDT	Gale Warning	MTR		3 days
Apr 30, 2:48 AM PDT	Small Craft Advisory	MTR		48 hr
Apr 30, 2:53 AM PDT	Small Craft Advisory	LOX		25 hr
Apr 30, 1:29 PM PDT	Wind Advisory	SGX	Riverside, San Bernardino, San Diego	58 hr
Apr 30, 1:31 PM PDT	Fire Weather Watch	STO		24 hr
Apr 30, 2:00 PM PDT	Gale Warning	MTR		4 days
Apr 30, 2:00 PM PDT	Small Craft Advisory	MTR		5 days
Apr 30, 3:10 PM PDT	Gale Warning	LOX		60 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	1
Special Weather Statement	9
Winter
Winter Storm Warning	2
Winter Storm Watch	3
Winter Weather Advisory	6
Cold
Freeze Warning	1
Frost Advisory	12
Wind and dust
High Wind Warning	2
High Wind Watch	3
Blowing Dust Advisory	2
Lake Wind Advisory	2
Wind Advisory	40
Fire
Red Flag Warning	2
Fire Weather Watch	4
Fog and smoke
Dense Fog Advisory	4
Coast and beach
High Surf Advisory	1
Beach Hazards Statement	5
Marine
Gale Warning	12
Hazardous Seas Warning	5
Gale Watch	6
Small Craft Advisory	57

By county

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

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. Rebuilt daily.