Alert archive / Arizona / Maricopa County
Weather alerts in Maricopa County, Arizona, 2008
179 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Maricopa County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 179
- Warnings
- 111
- Watches
- 12
- Advisories
- 40
- Busiest month
- August75 alerts
- Busiest day
- August 29, 200823 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Maricopa County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 74 | 21 | 72% | 40 | 75% | 21 min |
| Flash flood warnings | 21 | 7 | 67% | 15 | 73% | 69 min |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Phoenix, AZ: severe thunderstorm warnings | 141 | 25 | 82% | 52 | 71% | 22 min |
| NWS Phoenix, AZ: flash flood warnings | 38 | 12 | 68% | 28 | 68% | 93 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 |
|---|---|---|---|
| Jan 1, 3:46 AM MST | Red Flag Warning | PSR | 14 hr |
| Jan 27, 12:17 PM MST | River Flood Warning | PSR | 19 hr |
| Jan 27, 2:40 PM MST | Flash Flood Warning | PSR | 6 hr |
| Jan 27, 8:40 PM MST | Flash Flood Warning | PSR | 6 hr |
| Jan 28, 2:40 AM MST | Flash Flood Warning | PSR | 6 hr |
| Feb 12, 2:25 PM MST | Fire Weather Watch | PSR | 24 hr |
| Feb 13, 2:33 PM MST | Red Flag Warning | PSR | 29 hr |
| Mar 1, 2:17 PM MST | Red Flag Warning | PSR | 30 hr |
| Mar 5, 3:00 AM MST | Red Flag Warning | PSR | 18 hr |
| Mar 13, 2:20 PM MST | Fire Weather Watch | PSR | 14 hr |
| Mar 14, 4:28 AM MST | Red Flag Warning | PSR | 16 hr |
| Apr 13, 3:30 PM MST | Fire Weather Watch | PSR | 24 hr |
| Apr 14, 3:26 PM MST | Red Flag Warning | PSR | 30 hr |
| Apr 17, 4:51 AM MST | Fire Weather Watch | PSR | 48 hr |
| Apr 19, 9:20 AM MST | Red Flag Warning | PSR | 11 hr |
| Apr 27, 4:56 AM MST | Red Flag Warning | PSR | 7 hr |
| Apr 28, 2:27 PM MST | Fire Weather Watch | PSR | 39 hr |
| Apr 29, 1:54 PM MST | Red Flag Warning | PSR | 30 hr |
| May 1, 4:55 AM MST | Red Flag Warning | PSR | 13 hr |
| May 12, 2:43 PM MST | Red Flag Warning | PSR | 26 hr |
| May 15, 3:21 PM MST | Severe Thunderstorm Warning | PSR | 54 min |
| May 19, 3:34 AM MST | Fire Weather Watch | PSR | 35 hr |
| May 20, 3:01 PM MST | Red Flag Warning | PSR | 30 hr |
| May 22, 8:18 PM MST | Areal Flood Advisory | PSR | 4 hr |
| May 23, 12:24 AM MST | Areal Flood Advisory | PSR | 3 hr |
| Jun 3, 2:30 PM MST | Fire Weather Watch | PSR | 15 hr |
| Jun 4, 5:56 AM MST | Red Flag Warning | PSR | 16 hr |
| Jun 25, 8:48 PM MST | Severe Thunderstorm Warning | PSR | 30 min |
| Jun 27, 11:17 AM MST | Mesoscale Discussion | SPC | 58 min |
| Jun 29, 3:18 PM MST | Mesoscale Discussion | SPC | 57 min |
| Jun 30, 11:54 AM MST | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 10:06 PM MST | Severe Thunderstorm Warning | PSR | 54 min |
| Jul 3, 11:26 PM MST | Areal Flood Advisory | PSR | 109 min |
| Jul 4, 1:55 PM MST | Mesoscale Discussion | SPC | 3 hr |
| Jul 4, 4:13 PM MST | Severe Thunderstorm Warning | PSR | 62 min |
| Jul 4, 5:57 PM MST | Mesoscale Discussion | SPC | 63 min |
| Jul 4, 6:37 PM MST | Areal Flood Advisory | PSR | 113 min |
| Jul 4, 6:38 PM MST | Severe Thunderstorm Warning | PSR | 52 min |
| Jul 4, 7:22 PM MST | Severe Thunderstorm Warning | PSR | 53 min |
| Jul 4, 7:43 PM MST | Areal Flood Advisory | PSR | 2 hr |
| Jul 4, 7:55 PM MST | Areal Flood Advisory | PSR | 110 min |
| Jul 4, 9:15 PM MST | Areal Flood Advisory | PSR | 2 hr |
| Jul 9, 12:48 PM MST | Mesoscale Discussion | SPC | 87 min |
| Jul 9, 4:36 PM MST | Severe Thunderstorm Warning | PSR | 54 min |
| Jul 10, 12:57 PM MST | Mesoscale Discussion | SPC | 93 min |
| Jul 10, 2:54 PM MST | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 4:07 PM MST | Severe Thunderstorm Warning | PSR | 38 min |
| Jul 10, 5:32 PM MST | Severe Thunderstorm Warning | PSR | 43 min |
| Jul 10, 5:57 PM MST | Areal Flood Advisory | PSR | 2 hr |
| Jul 10, 6:26 PM MST | Severe Thunderstorm Warning | PSR | 64 min |
| Jul 10, 6:53 PM MST | Severe Thunderstorm Warning | PSR | 37 min |
| Jul 10, 6:54 PM MST | Severe Thunderstorm Warning | PSR | 66 min |
| Jul 10, 7:13 PM MST | Flash Flood Warning | PSR | 2 hr |
| Jul 10, 7:29 PM MST | Severe Thunderstorm Warning | PSR | 40 min |
| Jul 10, 7:55 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Jul 10, 8:03 PM MST | Severe Thunderstorm Warning | PSR | 44 min |
| Jul 10, 8:32 PM MST | Flash Flood Warning | PSR | 4 hr |
| Jul 10, 8:47 PM MST | Flash Flood Warning | PSR | 4 hr |
| Jul 10, 11:03 PM MST | Flash Flood Warning | PSR | 117 min |
| Jul 10, 11:28 PM MST | Flash Flood Warning | PSR | 2 hr |
| Jul 11, 12:39 AM MST | Areal Flood Advisory | PSR | 3 hr |
| Jul 11, 12:55 AM MST | Flash Flood Warning | PSR | 110 min |
| Jul 11, 1:19 AM MST | Flash Flood Warning | PSR | 38 min |
| Jul 13, 12:58 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Jul 13, 2:18 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Jul 13, 2:59 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Jul 13, 3:37 PM MST | Flash Flood Warning | PSR | 113 min |
| Jul 13, 4:14 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Jul 13, 4:14 PM MST | Flash Flood Warning | PSR | 2 hr |
| Jul 14, 11:37 AM MST | Flash Flood Warning | PSR | 113 min |
| Jul 14, 12:14 PM MST | Flash Flood Warning | PSR | 76 min |
| Jul 20, 4:33 AM MST | Areal Flood Advisory | PSR | 117 min |
| Jul 21, 7:35 PM MST | Areal Flood Advisory | PSR | 115 min |
| Jul 21, 7:38 PM MST | Severe Thunderstorm Warning | PSR | 37 min |
| Jul 21, 7:40 PM MST | Flash Flood Warning | PSR | 68 min |
| Jul 24, 5:11 PM MST | Areal Flood Advisory | PSR | 63 min |
| Jul 26, 5:31 PM MST | Severe Thunderstorm Warning | PSR | 44 min |
| Jul 26, 6:22 PM MST | Severe Thunderstorm Warning | PSR | 38 min |
| Aug 3, 8:07 PM MST | Severe Thunderstorm Warning | PSR | 23 min |
| Aug 5, 6:22 PM MST | Areal Flood Advisory | PSR | 113 min |
| Aug 5, 8:35 PM MST | Areal Flood Advisory | PSR | 115 min |
| Aug 5, 9:31 PM MST | Severe Thunderstorm Warning | PSR | 45 min |
| Aug 5, 9:40 PM MST | Areal Flood Advisory | PSR | 110 min |
| Aug 6, 7:04 PM MST | Severe Thunderstorm Warning | PSR | 56 min |
| Aug 7, 6:28 PM MST | Severe Thunderstorm Warning | PSR | 62 min |
| Aug 7, 7:06 PM MST | Severe Thunderstorm Warning | PSR | 54 min |
| Aug 7, 7:20 PM MST | Mesoscale Discussion | SPC | 55 min |
| Aug 7, 7:40 PM MST | Areal Flood Advisory | PSR | 110 min |
| Aug 7, 8:04 PM MST | Severe Thunderstorm Warning | PSR | 56 min |
| Aug 7, 8:31 PM MST | Severe Thunderstorm Warning | PSR | 59 min |
| Aug 7, 8:39 PM MST | Areal Flood Advisory | PSR | 53 min |
| Aug 7, 8:53 PM MST | Severe Thunderstorm Warning | PSR | 45 min |
| Aug 7, 9:21 PM MST | Areal Flood Advisory | PSR | 5 hr |
| Aug 14, 4:27 PM MST | Mesoscale Discussion | SPC | 63 min |
| Aug 14, 4:47 PM MST | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 14, 5:15 PM MST | Flash Flood Warning | PSR | 2 hr |
| Aug 14, 5:18 PM MST | Severe Thunderstorm Warning | PSR | 57 min |
| Aug 14, 6:07 PM MST | Severe Thunderstorm Warning | PSR | 38 min |
| Aug 14, 6:35 PM MST | Severe Thunderstorm Warning | PSR | 40 min |
| Aug 14, 6:43 PM MST | Severe Thunderstorm Warning | PSR | 62 min |
| Aug 14, 7:26 PM MST | Areal Flood Advisory | PSR | 109 min |
| Aug 15, 9:29 PM MST | Areal Flood Advisory | PSR | 106 min |
| Aug 25, 1:28 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Aug 25, 1:55 PM MST | Mesoscale Discussion | SPC | 2 hr |
| Aug 25, 2:15 PM MST | Severe Thunderstorm Warning | PSR | 60 min |
| Aug 25, 2:28 PM MST | Severe Thunderstorm Warning | PSR | 21 min |
| Aug 25, 3:06 PM MST | Severe Thunderstorm Warning | PSR | 54 min |
| Aug 25, 3:29 PM MST | Areal Flood Advisory | PSR | 2 hr |
| Aug 25, 3:58 PM MST | Severe Thunderstorm Warning | PSR | 62 min |
| Aug 25, 4:00 PM MST | Areal Flood Advisory | PSR | 2 hr |
| Aug 25, 4:45 PM MST | Flash Flood Warning | PSR | 105 min |
| Aug 25, 4:55 PM MST | Severe Thunderstorm Warning | PSR | 65 min |
| Aug 25, 5:04 PM MST | Severe Thunderstorm Warning | PSR | 56 min |
| Aug 25, 5:38 PM MST | Areal Flood Advisory | PSR | 51 min |
| Aug 25, 5:53 PM MST | Severe Thunderstorm Warning | PSR | 67 min |
| Aug 25, 6:03 PM MST | Flash Flood Warning | PSR | 86 min |
| Aug 25, 7:12 PM MST | Areal Flood Advisory | PSR | 4 hr |
| Aug 25, 9:57 PM MST | Areal Flood Advisory | PSR | 108 min |
| Aug 25, 10:42 PM MST | Flash Flood Warning | PSR | 4 hr |
| Aug 26, 1:25 AM MST | Areal Flood Advisory | PSR | 4 hr |
| Aug 27, 5:17 AM MST | Areal Flood Advisory | PSR | 118 min |
| Aug 27, 7:21 AM MST | Areal Flood Advisory | PSR | 3 hr |
| Aug 27, 3:16 PM MST | Mesoscale Discussion | SPC | 89 min |
| Aug 27, 5:16 PM MST | Severe Thunderstorm Warning | PSR | 44 min |
| Aug 28, 5:52 PM MST | Mesoscale Discussion | SPC | 113 min |
| Aug 28, 8:11 PM MST | Severe Thunderstorm Warning | PSR | 49 min |
| Aug 28, 8:19 PM MST | Severe Thunderstorm Warning | PSR | 41 min |
| Aug 28, 8:37 PM MST | Areal Flood Advisory | PSR | 113 min |
| Aug 28, 8:39 PM MST | Severe Thunderstorm Warning | PSR | 51 min |
| Aug 28, 8:46 PM MST | Severe Thunderstorm Warning | PSR | 59 min |
| Aug 28, 9:00 PM MST | Severe Thunderstorm Warning | PSR | 60 min |
| Aug 28, 9:23 PM MST | Flash Flood Warning | PSR | 119 min |
| Aug 28, 9:34 PM MST | Severe Thunderstorm Warning | PSR | 56 min |
| Aug 28, 9:39 PM MST | Severe Thunderstorm Warning | PSR | 51 min |
| Aug 28, 9:42 PM MST | Severe Thunderstorm Warning | PSR | 43 min |
| Aug 28, 9:49 PM MST | Areal Flood Advisory | PSR | 3 hr |
| Aug 28, 10:06 PM MST | Severe Thunderstorm Warning | PSR | 44 min |
| Aug 28, 10:16 PM MST | Severe Thunderstorm Warning | PSR | 38 min |
| Aug 28, 10:19 PM MST | Severe Thunderstorm Warning | PSR | 56 min |
| Aug 28, 10:31 PM MST | Severe Thunderstorm Warning | PSR | 29 min |
| Aug 28, 10:38 PM MST | Severe Thunderstorm Warning | PSR | 52 min |
| Aug 28, 10:46 PM MST | Severe Thunderstorm Warning | PSR | 44 min |
| Aug 28, 11:14 PM MST | Severe Thunderstorm Warning | PSR | 21 min |
| Aug 28, 11:27 PM MST | Severe Thunderstorm Warning | PSR | 63 min |
| Aug 28, 11:35 PM MST | Flash Flood Warning | PSR | 71 min |
| Aug 29, 3:46 PM MST | Mesoscale Discussion | SPC | 119 min |
| Aug 29, 4:55 PM MST | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 29, 8:22 PM MST | Mesoscale Discussion | SPC | 113 min |
| Aug 29, 10:08 PM MST | Severe Thunderstorm Warning | PSR | 52 min |
| Aug 29, 11:11 PM MST | Severe Thunderstorm Warning | PSR | 43 min |
| Aug 29, 11:23 PM MST | Areal Flood Advisory | PSR | 112 min |
| Aug 29, 11:39 PM MST | Severe Thunderstorm Warning | PSR | 66 min |
| Aug 30, 1:32 PM MST | Severe Thunderstorm Warning | PSR | 43 min |
| Sep 9, 2:53 PM MST | Severe Thunderstorm Warning | PSR | 37 min |
| Sep 9, 3:32 PM MST | Severe Thunderstorm Warning | PSR | 31 min |
| Sep 9, 3:44 PM MST | Severe Thunderstorm Warning | PSR | 25 min |
| Sep 9, 4:25 PM MST | Severe Thunderstorm Warning | PSR | 50 min |
| Sep 9, 5:13 PM MST | Severe Thunderstorm Warning | PSR | 47 min |
| Sep 9, 7:57 PM MST | Severe Thunderstorm Warning | PSR | 38 min |
| Sep 9, 8:25 PM MST | Severe Thunderstorm Warning | PSR | 50 min |
| Sep 10, 10:57 AM MST | Mesoscale Discussion | SPC | 93 min |
| Sep 10, 11:47 AM MST | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 10, 3:52 PM MST | Severe Thunderstorm Warning | PSR | 38 min |
| Sep 10, 4:15 PM MST | Mesoscale Discussion | SPC | 60 min |
| Sep 10, 4:22 PM MST | Severe Thunderstorm Warning | PSR | 38 min |
| Sep 10, 5:45 PM MST | Severe Thunderstorm Warning | PSR | 32 min |
| Sep 10, 6:28 PM MST | Severe Thunderstorm Warning | PSR | 47 min |
| Sep 10, 6:56 PM MST | Severe Thunderstorm Warning | PSR | 34 min |
| Sep 10, 8:16 PM MST | Severe Thunderstorm Warning | PSR | 44 min |
| Sep 11, 4:24 PM MST | Severe Thunderstorm Warning | PSR | 51 min |
| Sep 11, 5:39 PM MST | Severe Thunderstorm Warning | PSR | 66 min |
| Oct 10, 4:20 AM MST | Fire Weather Watch | PSR | 11 hr |
| Oct 11, 4:30 AM MST | Red Flag Warning | PSR | 10 hr |
| Oct 11, 5:15 AM MST | Severe Thunderstorm Warning | PSR | 45 min |
| Nov 9, 2:40 PM MST | Severe Thunderstorm Warning | PSR | 35 min |
| Nov 15, 8:47 AM MST | Red Flag Warning | PSR | 9 hr |
| Nov 27, 12:42 AM MST | Areal Flood Advisory | PSR | 7 hr |
| Nov 27, 1:55 AM MST | Areal Flood Advisory | PSR | 6 hr |
| Dec 26, 4:53 AM MST | Areal Flood Advisory | 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 | 74 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 16 |
| Flooding | |
| Flash Flood Warning | 21 |
| River Flood Warning | 1 |
| Areal Flood Advisory | 40 |
| Fire | |
| Red Flag Warning | 15 |
| Fire Weather Watch | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.