Alert archive / California / Imperial County

Weather alerts in Imperial County, California, 2018

122 weather alerts in 2018, 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 2018. Tap one for its archive.

Alerts: 122
Warnings: 32
Watches: 15
Advisories: 68
Busiest month: July27 alerts
Busiest day: September 30, 201810 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, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	8	1	88%	3	67%	17 min
Flash flood warnings	4	1	75%	1	0%

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Phoenix, AZ: tornado warnings	0			3	0%
NWS Phoenix, AZ: severe thunderstorm warnings	107	39	64%	216	54%	17 min
NWS Phoenix, AZ: flash flood warnings	121	73	40%	143	85%	71 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 8, 1:53 PM PST	Wind Advisory	PSR	31 hr
Jan 19, 11:50 PM PST	Wind Advisory	PSR	4 hr
Feb 10, 2:40 AM PST	Wind Advisory	PSR	28 hr
Feb 18, 1:45 AM PST	Wind Advisory	PSR	42 hr
Mar 14, 12:19 AM PDT	Wind Advisory	PSR	23 hr
Mar 14, 6:07 PM PDT	Blowing Dust Advisory	PSR	3 hr
Mar 17, 1:33 AM PDT	Wind Advisory	PSR	26 hr
Mar 26, 2:06 AM PDT	Wind Advisory	PSR	35 hr
Apr 2, 9:14 PM PDT	Wind Advisory	PSR	10 hr
Apr 7, 4:36 PM PDT	Blowing Dust Advisory	PSR	3 hr
Apr 9, 2:38 PM PDT	Fire Weather Watch	PSR	18 hr
Apr 10, 8:09 AM PDT	Red Flag Warning	PSR	61 hr
Apr 11, 2:44 AM PDT	Wind Advisory	PSR	41 hr
Apr 12, 9:41 AM PDT	Blowing Dust Advisory	PSR	12 hr
Apr 14, 2:21 PM PDT	Fire Weather Watch	PSR	36 hr
Apr 15, 1:15 PM PDT	Wind Advisory	PSR	36 hr
Apr 16, 7:15 PM PDT	Blowing Dust Advisory	PSR	6 hr
Apr 19, 3:20 AM PDT	Wind Advisory	PSR	16 hr
Apr 28, 1:36 PM PDT	Wind Advisory	PSR	36 hr
Apr 30, 4:44 AM PDT	Wind Advisory	PSR	48 hr
Apr 30, 1:39 PM PDT	Wind Advisory	PSR	39 hr
May 3, 3:02 AM PDT	Excessive Heat Watch	PSR	33 hr
May 4, 12:29 PM PDT	Excessive Heat Warning	PSR	56 hr
May 7, 2:04 AM PDT	Excessive Heat Watch	PSR	24 hr
May 8, 2:30 AM PDT	Excessive Heat Warning	PSR	41 hr
May 9, 3:49 AM PDT	Fire Weather Watch	PSR	24 hr
May 10, 3:20 AM PDT	Red Flag Warning	PSR	41 hr
May 10, 4:02 AM PDT	Wind Advisory	PSR	52 hr
May 21, 9:36 PM PDT	Wind Advisory	PSR	7 hr
May 26, 1:28 PM PDT	Blowing Dust Advisory	PSR	6 hr
May 31, 1:55 PM PDT	Excessive Heat Watch	PSR	23 hr
Jun 1, 12:51 PM PDT	Excessive Heat Warning	PSR	3 days
Jun 11, 1:46 PM PDT	Excessive Heat Warning	PSR	54 hr
Jun 19, 3:35 AM PDT	Excessive Heat Watch	PSR	10 hr
Jun 19, 1:31 PM PDT	Excessive Heat Warning	PSR	3 days
Jul 2, 1:35 PM PDT	Excessive Heat Watch	PSR	38 hr
Jul 4, 3:27 AM PDT	Excessive Heat Warning	PSR	66 hr
Jul 6, 8:00 PM PDT	Dust Storm Warning	PSR	60 min
Jul 9, 12:03 AM PDT	Dust Storm Advisory	PSR	57 min
Jul 9, 12:50 AM PDT	Dust Storm Advisory	PSR	55 min
Jul 9, 1:10 AM PDT	Dust Storm Advisory	PSR	95 min
Jul 9, 7:25 PM PDT	Dust Storm Warning	PSR	95 min
Jul 9, 8:08 PM PDT	Severe Thunderstorm Warning	PSR	37 min
Jul 9, 8:44 PM PDT	Severe Thunderstorm Warning	PSR	31 min
Jul 9, 8:51 PM PDT	Dust Storm Warning	PSR	24 min
Jul 9, 9:14 PM PDT	Dust Storm Warning	PSR	61 min
Jul 9, 10:07 PM PDT	Dust Storm Advisory	PSR	53 min
Jul 11, 11:41 AM PDT	Flash Flood Watch	PSR	14 hr
Jul 11, 1:05 PM PDT	Flash Flood Warning	PSR	4 hr
Jul 11, 2:02 PM PDT	Areal Flood Advisory	PSR	3 hr
Jul 11, 2:20 PM PDT	Areal Flood Advisory	PSR	3 hr
Jul 11, 3:23 PM PDT	Dust Storm Advisory	PSR	52 min
Jul 12, 6:11 PM PDT	Areal Flood Advisory	PSR	3 hr
Jul 18, 3:27 AM PDT	Excessive Heat Watch	PSR	48 hr
Jul 18, 8:54 AM PDT	Special Weather Statement	PSR	51 min
Jul 20, 3:13 AM PDT	Excessive Heat Warning	PSR	8 days
Jul 21, 6:10 AM PDT	Dust Storm Advisory	PSR	50 min
Jul 21, 6:51 AM PDT	Dust Storm Advisory	PSR	39 min
Jul 21, 7:05 AM PDT	Severe Thunderstorm Warning	PSR	40 min
Jul 21, 7:29 AM PDT	Dust Storm Advisory	PSR	61 min
Jul 28, 10:39 AM PDT	Blowing Dust Advisory	PSR	15 hr
Jul 28, 10:12 PM PDT	Dust Storm Warning	PSR	33 min
Aug 5, 1:22 AM PDT	Excessive Heat Warning	PSR	67 hr
Aug 8, 9:04 PM PDT	Dust Storm Warning	PSR	41 min
Aug 9, 12:22 AM PDT	Dust Storm Advisory	PSR	38 min
Aug 9, 9:48 PM PDT	Dust Storm Warning	PSR	27 min
Aug 9, 10:18 PM PDT	Dust Storm Warning	PSR	42 min
Aug 9, 11:04 PM PDT	Dust Storm Advisory	PSR	56 min
Aug 10, 12:17 AM PDT	Dust Storm Advisory	PSR	58 min
Aug 11, 9:07 AM PDT	Special Weather Statement	PSR	23 min
Aug 12, 11:05 PM PDT	Dust Storm Advisory	PSR	55 min
Aug 12, 11:53 PM PDT	Dust Storm Advisory	PSR	67 min
Aug 16, 11:03 AM PDT	Flash Flood Watch	PSR	9 hr
Aug 16, 5:05 PM PDT	Dust Storm Advisory	PSR	55 min
Aug 16, 5:26 PM PDT	Areal Flood Advisory	PSR	3 hr
Aug 16, 5:37 PM PDT	Flash Flood Warning	PSR	3 hr
Aug 16, 6:32 PM PDT	Dust Storm Advisory	PSR	28 min
Aug 16, 7:43 PM PDT	Areal Flood Advisory	PSR	3 hr
Aug 20, 6:20 PM PDT	Dust Storm Advisory	PSR	40 min
Sep 6, 3:08 AM PDT	Excessive Heat Watch	PSR	23 hr
Sep 7, 2:19 AM PDT	Excessive Heat Warning	PSR	42 hr
Sep 12, 6:24 PM PDT	Dust Storm Advisory	PSR	96 min
Sep 28, 2:01 PM PDT	Flash Flood Watch	PSR	5 days
Sep 30, 12:28 PM PDT	Dust Storm Advisory	PSR	47 min
Sep 30, 12:58 PM PDT	Severe Thunderstorm Warning	PSR	32 min
Sep 30, 1:10 PM PDT	Areal Flood Advisory	PSR	2 hr
Sep 30, 1:19 PM PDT	Dust Storm Advisory	PSR	41 min
Sep 30, 2:12 PM PDT	Dust Storm Advisory	PSR	48 min
Sep 30, 2:38 PM PDT	Special Weather Statement	PSR	37 min
Sep 30, 2:51 PM PDT	Areal Flood Advisory	PSR	114 min
Sep 30, 2:55 PM PDT	Dust Storm Advisory	PSR	65 min
Sep 30, 3:25 PM PDT	Special Weather Statement	PSR	50 min
Sep 30, 3:26 PM PDT	Blowing Dust Advisory	PSR	4 hr
Sep 30, 5:02 PM PDT	Severe Thunderstorm Warning	PSR	28 min
Sep 30, 5:46 PM PDT	Special Weather Statement	PSR	44 min
Sep 30, 9:21 PM PDT	Areal Flood Advisory	PSR	3 hr
Oct 3, 3:36 PM PDT	Special Weather Statement	PSR	39 min
Oct 3, 5:51 PM PDT	Special Weather Statement	PSR	39 min
Oct 3, 6:18 PM PDT	Severe Thunderstorm Warning	PSR	27 min
Oct 3, 6:39 PM PDT	Severe Thunderstorm Warning	PSR	36 min
Oct 3, 8:45 PM PDT	Areal Flood Advisory	PSR	62 min
Oct 5, 1:33 PM PDT	Wind Advisory	PSR	42 hr
Oct 12, 11:26 PM PDT	Severe Thunderstorm Warning	PSR	49 min
Oct 13, 12:02 AM PDT	Areal Flood Advisory	PSR	3 hr
Oct 13, 1:45 AM PDT	Flash Flood Warning	PSR	3 hr
Oct 13, 2:52 AM PDT	Flash Flood Watch	PSR	25 hr
Oct 13, 3:25 AM PDT	Areal Flood Advisory	PSR	3 hr
Oct 13, 4:37 AM PDT	Areal Flood Advisory	PSR	3 hr
Oct 13, 4:08 PM PDT	Areal Flood Advisory	PSR	5 hr
Oct 13, 5:59 PM PDT	Areal Flood Advisory	PSR	3 hr
Oct 13, 6:13 PM PDT	Flash Flood Warning	PSR	4 hr
Oct 14, 2:15 PM PDT	Wind Advisory	PSR	28 hr
Oct 15, 9:18 AM PDT	Blowing Dust Advisory	PSR	9 hr
Oct 31, 10:15 AM PDT	Dust Storm Advisory	PSR	2 hr
Nov 6, 5:39 AM PST	Dense Fog Advisory	PSR	3 hr
Nov 8, 4:14 AM PST	Dense Fog Advisory	PSR	4 hr
Nov 10, 1:46 AM PST	Fire Weather Watch	PSR	12 hr
Nov 10, 12:02 PM PST	Wind Advisory	PSR	28 hr
Nov 10, 1:53 PM PST	Red Flag Warning	PSR	31 hr
Nov 28, 2:05 PM PST	Wind Advisory	PSR	40 hr
Dec 6, 8:52 PM PST	Areal Flood Advisory	PSR	3 hr
Dec 24, 1:13 AM PST	Wind Advisory	PSR	36 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	8
Special Weather Statement	7
Flooding
Flash Flood Warning	4
Flash Flood Watch	4
Areal Flood Advisory	15
Heat
Excessive Heat Warning	9
Excessive Heat Watch	7
Wind and dust
Dust Storm Warning	8
Blowing Dust Advisory	8
Dust Storm Advisory	22
Wind Advisory	21
Fire
Red Flag Warning	3
Fire Weather Watch	4
Fog and smoke
Dense Fog Advisory	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2017 2019

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.