Alert archive / California / Imperial County
Weather alerts in Imperial County, California, 2024
89 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 89
- Warnings
- 21
- Watches
- 9
- Advisories
- 55
- Busiest month
- August22 alerts
- Busiest day
- August 11, 202410 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, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 1 | 80% | 0 | ||
| Flash flood warnings | 3 | 2 | 33% | 2 | 100% | 53 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Phoenix, AZ: severe thunderstorm warnings | 140 | 25 | 82% | 57 | 65% | 18 min |
| NWS Phoenix, AZ: flash flood warnings | 49 | 11 | 78% | 12 | 100% | 63 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 5, 12:26 PM PST | Wind Advisory | PSR | 56 hr |
| Jan 6, 12:24 PM PST | Freeze Watch | PSR | 13 hr |
| Jan 7, 1:01 AM PST | Freeze Warning | PSR | 55 hr |
| Jan 9, 12:08 AM PST | Freeze Warning | PSR | 32 hr |
| Jan 9, 1:06 PM PST | Wind Advisory | PSR | 48 hr |
| Jan 11, 9:42 AM PST | Dust Storm Advisory | PSR | 93 min |
| Jan 22, 12:03 PM PST | Areal Flood Advisory | PSR | 4 hr |
| Jan 22, 2:34 PM PST | Areal Flood Advisory | PSR | 3 hr |
| Jan 23, 3:52 AM PST | Dense Fog Advisory | PSR | 5 hr |
| Jan 23, 10:56 PM PST | Dense Fog Advisory | PSR | 10 hr |
| Jan 25, 2:16 AM PST | Dense Fog Advisory | PSR | 7 hr |
| Jan 25, 9:15 AM PST | Dense Fog Advisory | PSR | 105 min |
| Feb 5, 12:32 AM PST | Flood Watch | PSR | 48 hr |
| Feb 7, 12:16 PM PST | Wind Advisory | PSR | 28 hr |
| Feb 25, 11:46 PM PST | Wind Advisory | PSR | 34 hr |
| Feb 29, 12:02 PM PST | Wind Advisory | PSR | 4 days |
| Mar 2, 12:53 PM PST | Wind Advisory | PSR | 33 hr |
| Mar 13, 1:54 AM PDT | Wind Advisory | PSR | 34 hr |
| Mar 17, 7:48 AM PDT | Dense Fog Advisory | PSR | 2 hr |
| Mar 22, 2:26 AM PDT | Wind Advisory | PSR | 71 hr |
| Mar 28, 1:24 PM PDT | Wind Advisory | PSR | 32 hr |
| Mar 28, 1:24 PM PDT | Wind Advisory | PSR | 57 hr |
| Apr 3, 12:36 PM PDT | Wind Advisory | PSR | 64 hr |
| Apr 4, 1:30 PM PDT | Wind Advisory | PSR | 33 hr |
| Apr 12, 1:50 PM PDT | Wind Advisory | PSR | 60 hr |
| Apr 13, 1:58 PM PDT | Wind Advisory | PSR | 33 hr |
| Apr 19, 12:48 PM PDT | Wind Advisory | PSR | 16 hr |
| Apr 23, 1:34 PM PDT | Wind Advisory | PSR | 4 days |
| Apr 24, 12:10 PM PDT | Wind Advisory | PSR | 60 hr |
| Apr 25, 3:20 AM PDT | Wind Advisory | PSR | 18 hr |
| May 2, 12:51 PM PDT | Wind Advisory | PSR | 3 days |
| May 23, 12:38 PM PDT | Wind Advisory | PSR | 44 hr |
| Jun 2, 1:40 AM PDT | Excessive Heat Watch | PSR | 35 hr |
| Jun 3, 12:15 PM PDT | Excessive Heat Warning | PSR | 4 days |
| Jun 12, 1:08 PM PDT | Excessive Heat Watch | PSR | 12 hr |
| Jun 13, 1:03 AM PDT | Excessive Heat Warning | PSR | 67 hr |
| Jun 27, 1:12 PM PDT | Excessive Heat Watch | PSR | 48 hr |
| Jun 29, 1:17 PM PDT | Excessive Heat Warning | PSR | 15 days |
| Jul 13, 5:01 PM PDT | Flash Flood Warning | PSR | 53 min |
| Jul 17, 12:38 AM PDT | Excessive Heat Watch | PSR | 25 hr |
| Jul 18, 1:14 AM PDT | Excessive Heat Warning | PSR | 9 days |
| Jul 30, 3:29 PM PDT | Dust Storm Advisory | PSR | 61 min |
| Jul 30, 4:20 PM PDT | Dust Storm Advisory | PSR | 40 min |
| Jul 31, 1:04 PM PDT | Excessive Heat Watch | PSR | 24 hr |
| Jul 31, 5:25 PM PDT | Severe Thunderstorm Warning | PSR | 19 min |
| Aug 1, 1:26 PM PDT | Excessive Heat Warning | PSR | 5 days |
| Aug 1, 5:42 PM PDT | Severe Thunderstorm Warning | PSR | 48 min |
| Aug 1, 6:53 PM PDT | Areal Flood Advisory | PSR | 3 hr |
| Aug 6, 1:59 AM PDT | Blowing Dust Advisory | PSR | 20 hr |
| Aug 6, 4:10 PM PDT | Dust Storm Advisory | PSR | 65 min |
| Aug 10, 3:21 PM PDT | Dust Storm Warning | PSR | 84 min |
| Aug 10, 4:23 PM PDT | Dust Storm Advisory | PSR | 67 min |
| Aug 10, 5:21 PM PDT | Severe Thunderstorm Warning | PSR | 39 min |
| Aug 10, 5:37 PM PDT | Dust Storm Advisory | PSR | 53 min |
| Aug 10, 6:09 PM PDT | Areal Flood Advisory | PSR | 3 hr |
| Aug 11, 3:44 PM PDT | Severe Thunderstorm Warning | PSR | 15 min |
| Aug 11, 4:05 PM PDT | Flash Flood Warning | PSR | 3 hr |
| Aug 11, 4:13 PM PDT | Special Weather Statement | PSR | 47 min |
| Aug 11, 4:23 PM PDT | Flash Flood Warning | PSR | 3 hr |
| Aug 11, 4:39 PM PDT | Dust Storm Advisory | PSR | 39 min |
| Aug 11, 4:52 PM PDT | Dust Storm Warning | PSR | 53 min |
| Aug 11, 4:56 PM PDT | Dust Storm Advisory | PSR | 46 min |
| Aug 11, 5:51 PM PDT | Dust Storm Advisory | PSR | 54 min |
| Aug 18, 12:51 PM PDT | Excessive Heat Warning | PSR | 55 hr |
| Aug 28, 6:25 PM PDT | Areal Flood Advisory | PSR | 3 hr |
| Aug 31, 4:32 PM PDT | Dust Storm Advisory | PSR | 58 min |
| Sep 1, 12:37 PM PDT | Excessive Heat Watch | PSR | 36 hr |
| Sep 3, 12:07 AM PDT | Excessive Heat Warning | PSR | 8 days |
| Sep 7, 10:30 PM PDT | Severe Thunderstorm Warning | PSR | 45 min |
| Sep 7, 11:10 PM PDT | Areal Flood Advisory | PSR | 3 hr |
| Sep 7, 11:19 PM PDT | Special Weather Statement | PSR | 41 min |
| Sep 8, 12:05 AM PDT | Special Weather Statement | PSR | 25 min |
| Sep 8, 1:20 AM PDT | Special Weather Statement | PSR | 25 min |
| Sep 15, 1:14 PM PDT | Wind Advisory | PSR | 35 hr |
| Sep 16, 6:09 PM PDT | Dust Storm Advisory | PSR | 2 hr |
| Sep 24, 12:30 AM PDT | Excessive Heat Warning | PSR | 15 days |
| Oct 1, 9:34 PM PDT | Dust Storm Advisory | PSR | 33 min |
| Oct 16, 11:57 PM PDT | Wind Advisory | PSR | 42 hr |
| Oct 18, 10:28 AM PDT | Blowing Dust Advisory | PSR | 4 hr |
| Oct 26, 12:17 PM PDT | Wind Advisory | PSR | 69 hr |
| Oct 28, 7:02 PM PDT | Dust Storm Advisory | PSR | 118 min |
| Oct 28, 8:53 PM PDT | Dust Storm Advisory | PSR | 112 min |
| Nov 2, 1:23 AM PDT | Wind Advisory | PSR | 29 hr |
| Nov 2, 1:23 AM PDT | Wind Advisory | PSR | 62 hr |
| Nov 4, 11:32 PM PST | Wind Advisory | PSR | 36 hr |
| Nov 14, 11:50 AM PST | Wind Advisory | PSR | 37 hr |
| Dec 8, 10:46 PM PST | Freeze Watch | PSR | 24 hr |
| Dec 9, 10:47 PM PST | Freeze Warning | PSR | 33 hr |
| Dec 11, 11:51 PM PST | Wind Advisory | PSR | 33 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 | 5 |
| Special Weather Statement | 4 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 6 |
| Heat | |
| Excessive Heat Warning | 8 |
| Excessive Heat Watch | 6 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Wind and dust | |
| Dust Storm Warning | 2 |
| Blowing Dust Advisory | 2 |
| Dust Storm Advisory | 14 |
| Wind Advisory | 28 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.