Alert archive / Arizona / Pinal County
Weather alerts in Pinal County, Arizona, 2009
94 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Pinal County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 94
- Warnings
- 39
- Watches
- 7
- Advisories
- 28
- Busiest month
- July42 alerts
- Busiest day
- July 4, 20098 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Pinal County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 24 | 10 | 58% | 10 | 80% | 19 min |
| Flash flood warnings | 3 | 0 | 100% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Tucson, AZ: tornado warnings | 0 | 1 | 0% | |||
| NWS Tucson, AZ: severe thunderstorm warnings | 44 | 12 | 73% | 38 | 55% | 14 min |
| NWS Tucson, AZ: flash flood warnings | 20 | 3 | 85% | 7 | 43% | 15 min |
| NWS Phoenix, AZ: severe thunderstorm warnings | 54 | 12 | 78% | 37 | 57% | 17 min |
| NWS Phoenix, AZ: flash flood warnings | 16 | 3 | 81% | 6 | 67% | 28 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 21, 5:51 AM MST | Fire Weather Watch | PSR | 21 hr |
| Mar 22, 2:28 AM MST | Red Flag Warning | PSR | 17 hr |
| Mar 25, 3:04 AM MST | Fire Weather Watch | PSR | 11 hr |
| Mar 25, 2:00 PM MST | Red Flag Warning | PSR | 33 hr |
| Mar 28, 3:26 PM MST | Red Flag Warning | PSR | 29 hr |
| Mar 29, 2:23 PM MST | Red Flag Warning | PSR | 25 hr |
| Apr 2, 4:10 AM MST | Fire Weather Watch | PSR | 11 hr |
| Apr 2, 2:55 PM MST | Red Flag Warning | PSR | 31 hr |
| Apr 10, 2:51 PM MST | Red Flag Warning | PSR | 4 hr |
| Apr 13, 3:49 PM MST | Fire Weather Watch | PSR | 13 hr |
| Apr 14, 5:10 AM MST | Red Flag Warning | PSR | 15 hr |
| Apr 24, 5:43 AM MST | Fire Weather Watch | PSR | 8 hr |
| Apr 24, 1:51 PM MST | Red Flag Warning | PSR | 15 hr |
| May 17, 7:13 PM MST | Severe Thunderstorm Warning | PSR | 38 min |
| Jun 5, 7:53 PM MST | Red Flag Warning | PSR | 24 hr |
| Jun 29, 4:41 PM MST | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 5:08 PM MST | Areal Flood Advisory | TWC | 79 min |
| Jun 30, 5:10 PM MST | Mesoscale Discussion | SPC | 65 min |
| Jul 2, 5:30 PM MST | Areal Flood Advisory | TWC | 3 hr |
| Jul 2, 6:03 PM MST | Flash Flood Warning | TWC | 91 min |
| Jul 3, 3:45 PM MST | Mesoscale Discussion | SPC | 60 min |
| Jul 3, 5:50 PM MST | Special Weather Statement | PSR | 40 min |
| Jul 3, 6:01 PM MST | Special Weather Statement | PSR | 44 min |
| Jul 3, 6:44 PM MST | Severe Thunderstorm Warning | PSR | 61 min |
| Jul 3, 7:36 PM MST | Areal Flood Advisory | TWC | 3 hr |
| Jul 3, 7:38 PM MST | Severe Thunderstorm Warning | PSR | 52 min |
| Jul 3, 7:44 PM MST | Areal Flood Advisory | PSR | 2 hr |
| Jul 3, 9:59 PM MST | Areal Flood Advisory | PSR | 106 min |
| Jul 3, 11:41 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Jul 8, 6:37 PM MST | Severe Thunderstorm Warning | TWC | 38 min |
| Jul 8, 7:06 PM MST | Areal Flood Advisory | TWC | 3 hr |
| Jul 10, 3:54 PM MST | Severe Thunderstorm Warning | TWC | 36 min |
| Jul 15, 10:07 PM MST | Severe Thunderstorm Warning | PSR | 30 min |
| Jul 16, 6:04 PM MST | Severe Thunderstorm Warning | PSR | 26 min |
| Jul 17, 3:35 PM MST | Mesoscale Discussion | SPC | 85 min |
| Jul 17, 4:06 PM MST | Severe Thunderstorm Warning | PSR | 39 min |
| Jul 17, 4:13 PM MST | Severe Thunderstorm Warning | TWC | 47 min |
| Jul 17, 4:57 PM MST | Severe Thunderstorm Warning | TWC | 48 min |
| Jul 17, 5:12 PM MST | Severe Thunderstorm Warning | PSR | 48 min |
| Jul 17, 5:46 PM MST | Severe Thunderstorm Warning | TWC | 44 min |
| Jul 18, 5:26 PM MST | Severe Thunderstorm Warning | PSR | 64 min |
| Jul 18, 6:08 PM MST | Severe Thunderstorm Warning | PSR | 52 min |
| Jul 19, 8:04 PM MST | Severe Thunderstorm Warning | PSR | 56 min |
| Jul 19, 8:48 PM MST | Areal Flood Advisory | PSR | 117 min |
| Jul 19, 10:03 PM MST | Severe Thunderstorm Warning | PSR | 57 min |
| Jul 20, 6:32 PM MST | Severe Thunderstorm Warning | PSR | 32 min |
| Jul 21, 10:18 PM MST | Severe Thunderstorm Warning | PSR | 42 min |
| Jul 21, 10:20 PM MST | Severe Thunderstorm Warning | PSR | 40 min |
| Jul 22, 5:08 PM MST | Areal Flood Advisory | TWC | 3 hr |
| Jul 23, 9:14 PM MST | Severe Thunderstorm Warning | TWC | 31 min |
| Jul 23, 9:47 PM MST | Special Weather Statement | PSR | 58 min |
| Jul 23, 10:06 PM MST | Special Weather Statement | PSR | 54 min |
| Jul 24, 1:29 PM MST | Areal Flood Warning | TWC | 5 min |
| Jul 24, 1:31 PM MST | Flash Flood Warning | TWC | 2 hr |
| Jul 25, 11:54 AM MST | Areal Flood Advisory | PSR | 111 min |
| Jul 25, 4:59 PM MST | Severe Thunderstorm Warning | TWC | 46 min |
| Jul 25, 5:17 PM MST | Severe Thunderstorm Warning | PSR | 58 min |
| Jul 25, 5:17 PM MST | Areal Flood Advisory | TWC | 3 hr |
| Jul 25, 6:11 PM MST | Flash Flood Warning | PSR | 109 min |
| Aug 4, 9:00 PM MST | Special Weather Statement | PSR | 90 min |
| Aug 4, 10:47 PM MST | Special Weather Statement | PSR | 73 min |
| Aug 5, 4:57 PM MST | Special Weather Statement | TWC | 48 min |
| Aug 5, 8:25 PM MST | Areal Flood Advisory | TWC | 80 min |
| Aug 13, 5:18 AM MST | Areal Flood Advisory | PSR | 3 hr |
| Aug 21, 3:10 PM MST | Mesoscale Discussion | SPC | 65 min |
| Aug 21, 3:14 PM MST | Special Weather Statement | TWC | 61 min |
| Aug 21, 3:43 PM MST | Special Weather Statement | TWC | 32 min |
| Aug 21, 9:16 PM MST | Special Weather Statement | PSR | 59 min |
| Aug 22, 2:24 PM MST | Areal Flood Advisory | TWC | 81 min |
| Aug 30, 6:30 PM MST | Special Weather Statement | TWC | 60 min |
| Sep 3, 3:57 PM MST | Areal Flood Advisory | PSR | 108 min |
| Sep 3, 5:38 PM MST | Areal Flood Advisory | PSR | 112 min |
| Sep 3, 5:47 PM MST | Areal Flood Advisory | TWC | 70 min |
| Sep 3, 6:24 PM MST | Special Weather Statement | PSR | 51 min |
| Sep 3, 6:53 PM MST | Areal Flood Advisory | TWC | 82 min |
| Sep 3, 8:28 PM MST | Areal Flood Advisory | PSR | 2 hr |
| Sep 3, 9:11 PM MST | Areal Flood Advisory | PSR | 109 min |
| Sep 4, 4:57 PM MST | Areal Flood Advisory | TWC | 108 min |
| Sep 5, 7:04 AM MST | Areal Flood Advisory | PSR | 116 min |
| Sep 5, 7:32 AM MST | Areal Flood Advisory | TWC | 88 min |
| Sep 5, 9:13 AM MST | Areal Flood Advisory | PSR | 2 hr |
| Sep 5, 11:22 AM MST | Areal Flood Advisory | PSR | 113 min |
| Sep 8, 8:13 PM MST | Areal Flood Advisory | TWC | 2 hr |
| Sep 8, 10:23 PM MST | Areal Flood Advisory | PSR | 112 min |
| Sep 19, 4:32 PM MST | Special Weather Statement | PSR | 43 min |
| Sep 19, 5:07 PM MST | Special Weather Statement | PSR | 53 min |
| Oct 26, 12:50 AM MST | Fire Weather Watch | PSR | 13 hr |
| Oct 26, 2:15 PM MST | Red Flag Warning | PSR | 30 hr |
| Oct 27, 2:36 AM MST | Fire Weather Watch | PSR | 11 hr |
| Oct 27, 1:51 PM MST | Red Flag Warning | PSR | 27 hr |
| Nov 29, 1:58 PM MST | Special Weather Statement | PSR | 62 min |
| Dec 7, 4:33 PM MST | Areal Flood Advisory | PSR | 4 hr |
| Dec 7, 11:06 PM MST | Severe Thunderstorm Warning | PSR | 39 min |
| Dec 7, 11:45 PM MST | Severe Thunderstorm Warning | PSR | 30 min |
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 | 24 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 15 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 3 |
| Areal Flood Advisory | 28 |
| Fire | |
| Red Flag Warning | 11 |
| Fire Weather Watch | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.