Alert archive / California / Imperial County
Weather alerts in Imperial County, California, 2013
49 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 49
- Warnings
- 22
- Watches
- 3
- Advisories
- 14
- Busiest month
- August19 alerts
- Busiest day
- August 24, 201311 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, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 3 | 63% | 5 | 80% | 27 min |
| Flash flood warnings | 7 | 3 | 57% | 4 | 100% | 45 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Phoenix, AZ: severe thunderstorm warnings | 59 | 26 | 56% | 65 | 68% | 18 min |
| NWS Phoenix, AZ: flash flood warnings | 44 | 19 | 57% | 38 | 84% | 55 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 14, 2:22 AM PST | Red Flag Warning | PSR | 16 hr |
| Apr 6, 4:51 AM PDT | Fire Weather Watch | PSR | 32 hr |
| Apr 7, 12:31 PM PDT | Red Flag Warning | PSR | 31 hr |
| Apr 10, 10:09 AM PDT | Red Flag Warning | PSR | 9 hr |
| Apr 16, 3:31 AM PDT | Fire Weather Watch | PSR | 23 hr |
| Apr 17, 2:21 AM PDT | Red Flag Warning | PSR | 17 hr |
| May 1, 2:18 PM PDT | Red Flag Warning | PSR | 21 hr |
| Jul 21, 3:20 PM PDT | Areal Flood Advisory | PSR | 115 min |
| Aug 22, 6:40 PM PDT | Areal Flood Advisory | PSR | 110 min |
| Aug 24, 12:43 PM PDT | Severe Thunderstorm Warning | PSR | 62 min |
| Aug 24, 1:07 PM PDT | Flash Flood Warning | PSR | 113 min |
| Aug 24, 1:57 PM PDT | Severe Thunderstorm Warning | PSR | 63 min |
| Aug 24, 2:38 PM PDT | Mesoscale Discussion | SPC | 67 min |
| Aug 24, 2:52 PM PDT | Severe Thunderstorm Warning | PSR | 53 min |
| Aug 24, 2:58 PM PDT | Flash Flood Warning | PSR | 3 hr |
| Aug 24, 2:58 PM PDT | Flash Flood Warning | PSR | 2 hr |
| Aug 24, 3:35 PM PDT | Special Weather Statement | PSR | 40 min |
| Aug 24, 3:54 PM PDT | Severe Thunderstorm Warning | PSR | 66 min |
| Aug 24, 4:50 PM PDT | Flash Flood Warning | PSR | 3 hr |
| Aug 24, 4:54 PM PDT | Special Weather Statement | PSR | 51 min |
| Aug 24, 5:04 PM PDT | Special Weather Statement | PSR | 41 min |
| Aug 24, 5:59 PM PDT | Areal Flood Warning | PSR | 4 hr |
| Aug 24, 7:00 PM PDT | Areal Flood Advisory | PSR | 2 hr |
| Aug 28, 3:33 PM PDT | Severe Thunderstorm Warning | PSR | 57 min |
| Aug 28, 4:08 PM PDT | Special Weather Statement | PSR | 52 min |
| Aug 29, 12:42 PM PDT | Areal Flood Advisory | PSR | 108 min |
| Aug 31, 4:59 PM PDT | Areal Flood Advisory | PSR | 106 min |
| Aug 31, 6:45 PM PDT | Special Weather Statement | PSR | 45 min |
| Aug 31, 7:32 PM PDT | Areal Flood Advisory | PSR | 118 min |
| Sep 2, 4:34 PM PDT | Severe Thunderstorm Warning | PSR | 56 min |
| Sep 2, 4:57 PM PDT | Severe Thunderstorm Warning | PSR | 78 min |
| Sep 2, 5:10 PM PDT | Areal Flood Advisory | PSR | 110 min |
| Sep 2, 7:20 PM PDT | Areal Flood Advisory | PSR | 115 min |
| Sep 7, 4:33 PM PDT | Flash Flood Warning | PSR | 3 hr |
| Sep 7, 4:56 PM PDT | Flash Flood Warning | PSR | 3 hr |
| Sep 7, 5:26 PM PDT | Special Weather Statement | PSR | 49 min |
| Sep 7, 6:43 PM PDT | Areal Flood Advisory | PSR | 107 min |
| Sep 8, 2:57 PM PDT | Flash Flood Warning | PSR | 93 min |
| Sep 9, 5:19 PM PDT | Special Weather Statement | PSR | 41 min |
| Sep 9, 5:57 PM PDT | Special Weather Statement | PSR | 63 min |
| Sep 9, 6:10 PM PDT | Severe Thunderstorm Warning | PSR | 65 min |
| Sep 9, 6:46 PM PDT | Areal Flood Advisory | PSR | 119 min |
| Sep 9, 7:10 PM PDT | Areal Flood Advisory | PSR | 2 hr |
| Sep 9, 7:20 PM PDT | Special Weather Statement | PSR | 55 min |
| Sep 9, 7:49 PM PDT | Areal Flood Advisory | PSR | 116 min |
| Oct 2, 3:06 AM PDT | Fire Weather Watch | PSR | 34 hr |
| Oct 3, 12:38 PM PDT | Red Flag Warning | PSR | 30 hr |
| Nov 22, 8:39 AM PST | Areal Flood Advisory | PSR | 7 hr |
| Nov 22, 11:46 AM PST | Areal Flood Advisory | PSR | 4 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 |
| Mesoscale Discussion | 1 |
| Special Weather Statement | 9 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 7 |
| Areal Flood Advisory | 14 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.