Alert archive / California / Imperial County

Weather alerts in Imperial County, California, 2019

138 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Imperial County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts: 138
Warnings: 41
Watches: 10
Advisories: 74
Busiest month: September32 alerts
Busiest day: November 20, 201912 alerts

Over time

By month

Warning verification

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

Imperial County, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	6	0	100%	0
Flash flood warnings	18	9	50%	10	70%	68 min

Each office's whole area, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Phoenix, AZ: tornado warnings	3	1	67%	7	14%	0 min
NWS Phoenix, AZ: severe thunderstorm warnings	80	24	70%	73	68%	16 min
NWS Phoenix, AZ: flash flood warnings	123	61	50%	115	83%	86 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	Lasted
Jan 6, 8:18 AM PST	Dense Fog Advisory	PSR	102 min
Jan 7, 2:45 AM PST	Dense Fog Advisory	PSR	5 hr
Jan 15, 8:24 AM PST	Areal Flood Advisory	PSR	4 hr
Jan 15, 9:02 AM PST	Areal Flood Advisory	PSR	4 hr
Jan 16, 3:33 AM PST	Dense Fog Advisory	PSR	8 hr
Jan 17, 12:43 AM PST	Dense Fog Advisory	PSR	7 hr
Jan 20, 12:49 AM PST	Wind Advisory	PSR	36 hr
Jan 21, 12:55 PM PST	Wind Advisory	PSR	28 hr
Jan 31, 7:20 PM PST	Areal Flood Advisory	PSR	3 hr
Jan 31, 9:35 PM PST	Areal Flood Advisory	PSR	2 hr
Feb 4, 1:57 AM PST	Wind Advisory	PSR	12 hr
Feb 5, 1:02 PM PST	Wind Advisory	PSR	9 hr
Feb 12, 1:27 PM PST	Flood Watch	PSR	69 hr
Feb 14, 7:23 AM PST	Areal Flood Advisory	PSR	6 hr
Feb 17, 12:31 PM PST	Freeze Watch	PSR	38 hr
Feb 19, 2:55 AM PST	Freeze Warning	PSR	29 hr
Mar 1, 12:52 PM PST	Wind Advisory	PSR	40 hr
Mar 7, 8:34 PM PST	Wind Advisory	PSR	23 hr
Mar 12, 12:33 PM PDT	Wind Advisory	PSR	27 hr
Mar 20, 8:51 AM PDT	Wind Advisory	PSR	20 hr
Apr 1, 2:58 PM PDT	Wind Advisory	PSR	39 hr
Apr 8, 2:21 AM PDT	Wind Advisory	PSR	65 hr
Apr 9, 2:54 AM PDT	High Wind Warning	PSR	26 hr
Apr 9, 2:54 AM PDT	Wind Advisory	PSR	33 hr
Apr 9, 6:28 PM PDT	Blowing Dust Advisory	PSR	3 hr
Apr 15, 2:17 AM PDT	Wind Advisory	PSR	48 hr
Apr 19, 1:12 PM PDT	Wind Advisory	PSR	41 hr
Apr 28, 2:36 PM PDT	Wind Advisory	PSR	32 hr
Apr 30, 3:20 AM PDT	Wind Advisory	PSR	26 hr
May 5, 8:45 PM PDT	Wind Advisory	PSR	8 hr
May 14, 4:22 PM PDT	Wind Advisory	PSR	67 hr
May 16, 3:39 PM PDT	Blowing Dust Advisory	PSR	4 hr
May 18, 3:52 AM PDT	Wind Advisory	PSR	4 days
May 20, 2:22 PM PDT	Wind Advisory	PSR	55 hr
May 21, 3:57 AM PDT	High Wind Warning	PSR	18 hr
May 21, 3:57 AM PDT	Wind Advisory	PSR	42 hr
May 22, 12:58 AM PDT	Wind Advisory	PSR	20 hr
May 25, 1:34 AM PDT	Wind Advisory	PSR	51 hr
Jun 7, 3:31 AM PDT	Excessive Heat Watch	PSR	71 hr
Jun 10, 2:10 AM PDT	Excessive Heat Warning	PSR	4 days
Jun 13, 3:27 AM PDT	Wind Advisory	PSR	54 hr
Jun 20, 1:15 AM PDT	Wind Advisory	PSR	49 hr
Jul 8, 2:37 AM PDT	Excessive Heat Watch	PSR	35 hr
Jul 9, 1:19 PM PDT	Excessive Heat Warning	PSR	7 days
Jul 23, 12:30 AM PDT	Dust Storm Advisory	PSR	60 min
Jul 23, 5:28 AM PDT	Areal Flood Advisory	PSR	3 hr
Jul 23, 3:09 PM PDT	Areal Flood Advisory	PSR	3 hr
Jul 23, 3:57 PM PDT	Special Weather Statement	PSR	48 min
Jul 23, 4:26 PM PDT	Dust Storm Advisory	PSR	94 min
Jul 23, 4:45 PM PDT	Special Weather Statement	PSR	45 min
Jul 23, 5:48 PM PDT	Special Weather Statement	PSR	42 min
Jul 23, 5:50 PM PDT	Special Weather Statement	PSR	40 min
Jul 23, 5:58 PM PDT	Severe Thunderstorm Warning	PSR	32 min
Jul 23, 6:19 PM PDT	Flash Flood Warning	PSR	4 hr
Jul 25, 3:29 PM PDT	Flash Flood Warning	PSR	3 hr
Jul 27, 2:13 PM PDT	Excessive Heat Warning	PSR	30 hr
Aug 2, 12:55 PM PDT	Excessive Heat Warning	PSR	3 days
Aug 7, 8:54 AM PDT	Areal Flood Advisory	PSR	3 hr
Aug 11, 2:45 AM PDT	Excessive Heat Watch	PSR	36 hr
Aug 12, 2:17 PM PDT	Excessive Heat Warning	PSR	4 days
Aug 16, 1:06 PM PDT	Excessive Heat Warning	PSR	5 days
Aug 27, 2:16 PM PDT	Excessive Heat Warning	PSR	4 days
Sep 1, 11:05 PM PDT	Dust Storm Advisory	PSR	25 min
Sep 1, 11:50 PM PDT	Dust Storm Advisory	PSR	85 min
Sep 3, 3:08 AM PDT	Excessive Heat Warning	PSR	41 hr
Sep 4, 4:42 PM PDT	Areal Flood Advisory	PSR	3 hr
Sep 4, 6:16 PM PDT	Severe Thunderstorm Warning	PSR	44 min
Sep 4, 6:37 PM PDT	Areal Flood Advisory	PSR	3 hr
Sep 4, 6:43 PM PDT	Dust Storm Warning	PSR	62 min
Sep 4, 7:46 PM PDT	Dust Storm Advisory	PSR	89 min
Sep 4, 8:01 PM PDT	Severe Thunderstorm Warning	PSR	44 min
Sep 4, 8:06 PM PDT	Flash Flood Warning	PSR	4 hr
Sep 4, 8:45 PM PDT	Special Weather Statement	PSR	45 min
Sep 7, 2:34 PM PDT	Wind Advisory	PSR	16 hr
Sep 23, 6:36 PM PDT	Dust Storm Warning	PSR	32 min
Sep 23, 9:01 PM PDT	Areal Flood Advisory	PSR	119 min
Sep 23, 9:41 PM PDT	Flash Flood Warning	PSR	4 hr
Sep 24, 2:25 PM PDT	Flash Flood Watch	PSR	51 hr
Sep 25, 1:08 PM PDT	Dust Storm Advisory	PSR	97 min
Sep 25, 1:39 PM PDT	Special Weather Statement	PSR	51 min
Sep 25, 2:13 PM PDT	Severe Thunderstorm Warning	PSR	62 min
Sep 25, 3:15 PM PDT	Special Weather Statement	PSR	60 min
Sep 25, 3:36 PM PDT	Flash Flood Warning	PSR	4 hr
Sep 25, 3:48 PM PDT	Mesoscale Discussion	SPC	87 min
Sep 25, 4:00 PM PDT	Flash Flood Warning	PSR	4 hr
Sep 25, 5:04 PM PDT	Flash Flood Warning	PSR	2 hr
Sep 25, 6:04 PM PDT	Special Weather Statement	PSR	41 min
Sep 25, 6:22 PM PDT	Areal Flood Advisory	PSR	3 hr
Sep 25, 7:04 PM PDT	Flash Flood Warning	PSR	4 hr
Sep 25, 7:25 PM PDT	Areal Flood Advisory	PSR	3 hr
Sep 25, 7:49 PM PDT	Areal Flood Advisory	PSR	3 hr
Sep 25, 8:01 PM PDT	Flash Flood Warning	PSR	4 hr
Sep 26, 1:58 PM PDT	Special Weather Statement	PSR	47 min
Sep 28, 1:46 AM PDT	Wind Advisory	PSR	30 hr
Oct 8, 2:56 AM PDT	Wind Advisory	PSR	68 hr
Oct 8, 3:01 AM PDT	Fire Weather Watch	PSR	25 hr
Oct 9, 3:42 AM PDT	Red Flag Warning	PSR	43 hr
Oct 10, 11:57 AM PDT	Blowing Dust Advisory	PSR	5 hr
Oct 17, 2:40 AM PDT	Wind Advisory	PSR	31 hr
Oct 23, 3:42 AM PDT	Red Flag Warning	PSR	40 hr
Oct 24, 10:16 AM PDT	Blowing Dust Advisory	PSR	7 hr
Oct 26, 1:48 PM PDT	Wind Advisory	PSR	44 hr
Oct 27, 1:59 PM PDT	Wind Advisory	PSR	7 hr
Oct 28, 10:29 AM PDT	Red Flag Warning	PSR	55 hr
Oct 28, 2:12 PM PDT	Wind Advisory	PSR	48 hr
Nov 18, 11:59 AM PST	Flash Flood Watch	PSR	58 hr
Nov 19, 5:54 PM PST	Areal Flood Advisory	PSR	3 hr
Nov 19, 6:03 PM PST	Special Weather Statement	PSR	42 min
Nov 19, 7:07 PM PST	Areal Flood Advisory	PSR	3 hr
Nov 19, 8:07 PM PST	Flash Flood Warning	PSR	4 hr
Nov 19, 8:20 PM PST	Flash Flood Warning	PSR	4 hr
Nov 19, 9:10 PM PST	Areal Flood Advisory	PSR	3 hr
Nov 19, 9:25 PM PST	Special Weather Statement	PSR	35 min
Nov 19, 9:50 PM PST	Areal Flood Advisory	PSR	4 hr
Nov 19, 9:57 PM PST	Special Weather Statement	PSR	48 min
Nov 19, 10:35 PM PST	Areal Flood Advisory	PSR	4 hr
Nov 19, 11:09 PM PST	Flash Flood Warning	PSR	5 hr
Nov 19, 11:33 PM PST	Flash Flood Warning	PSR	4 hr
Nov 25, 4:22 AM PST	Wind Advisory	PSR	26 hr
Nov 26, 1:07 PM PST	Flash Flood Watch	PSR	3 days
Nov 27, 3:02 AM PST	Wind Advisory	PSR	60 hr
Nov 28, 3:15 PM PST	Areal Flood Advisory	PSR	4 hr
Nov 28, 3:17 PM PST	Areal Flood Advisory	PSR	4 hr
Nov 28, 3:41 PM PST	Flash Flood Warning	PSR	4 hr
Nov 28, 4:51 PM PST	Severe Thunderstorm Warning	PSR	24 min
Nov 28, 5:15 PM PST	Severe Thunderstorm Warning	PSR	45 min
Nov 28, 5:22 PM PST	Areal Flood Advisory	PSR	3 hr
Nov 28, 5:54 PM PST	Flash Flood Warning	PSR	4 hr
Nov 28, 6:30 PM PST	Areal Flood Advisory	PSR	4 hr
Nov 28, 6:52 PM PST	Flash Flood Warning	PSR	8 hr
Nov 28, 6:59 PM PST	Flash Flood Warning	PSR	6 hr
Nov 28, 9:59 PM PST	Areal Flood Warning	PSR	6 hr
Dec 4, 11:37 AM PST	Areal Flood Advisory	PSR	4 hr
Dec 5, 4:05 AM PST	Dense Fog Advisory	PSR	4 hr
Dec 8, 3:50 AM PST	Dense Fog Advisory	PSR	4 hr
Dec 13, 1:43 PM PST	Wind Advisory	PSR	44 hr
Dec 25, 3:04 AM PST	Flash Flood Watch	PSR	42 hr
Dec 26, 8:35 AM PST	Flash Flood Warning	PSR	3 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	6
Mesoscale Discussion	1
Special Weather Statement	12
Flooding
Areal Flood Warning	1
Flash Flood Warning	18
Flash Flood Watch	4
Flood Watch	1
Areal Flood Advisory	24
Heat
Excessive Heat Warning	8
Excessive Heat Watch	3
Cold
Freeze Warning	1
Freeze Watch	1
Wind and dust
Dust Storm Warning	2
High Wind Warning	2
Blowing Dust Advisory	4
Dust Storm Advisory	6
Wind Advisory	34
Fire
Red Flag Warning	3
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	6

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2018 2020

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.