Alert archive / Arizona / Mohave County
Weather alerts in Mohave County, Arizona, 2009
120 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mohave County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 120
- Warnings
- 64
- Watches
- 21
- Advisories
- 31
- Busiest month
- July33 alerts
- Busiest day
- July 3, 200910 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Mohave County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 22 | 5 | 77% | 17 | 41% | 19 min |
| Flash flood warnings | 12 | 3 | 75% | 7 | 43% | 74 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Las Vegas, NV: severe thunderstorm warnings | 53 | 7 | 87% | 39 | 26% | 17 min |
| NWS Las Vegas, NV: flash flood warnings | 32 | 7 | 78% | 19 | 37% | 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 3, 2:59 PM MST | Lake Wind Advisory | VEF | 28 hr |
| Jan 8, 4:10 PM MST | Lake Wind Advisory | VEF | 27 hr |
| Jan 10, 3:08 PM MST | Lake Wind Advisory | VEF | 5 hr |
| Jan 11, 3:45 PM MST | Lake Wind Advisory | VEF | 27 hr |
| Jan 28, 3:38 PM MST | Lake Wind Advisory | VEF | 28 hr |
| Feb 4, 4:44 PM MST | Winter Storm Watch | VEF | 48 hr |
| Feb 5, 4:54 PM MST | Winter Storm Warning | VEF | 60 hr |
| Feb 8, 5:16 AM MST | Winter Weather Advisory | VEF | 14 hr |
| Feb 9, 5:14 AM MST | Winter Weather Advisory | VEF | 19 hr |
| Feb 14, 4:52 PM MST | Winter Storm Watch | VEF | 35 hr |
| Feb 15, 4:46 PM MST | Winter Storm Warning | VEF | 32 hr |
| Mar 4, 5:02 AM MST | Wind Advisory | VEF | 17 hr |
| Mar 8, 3:10 PM MST | Wind Advisory | VEF | 33 hr |
| Mar 20, 10:03 PM MST | Wind Advisory | VEF | 47 hr |
| Mar 21, 3:51 PM MST | High Wind Warning | VEF | 31 hr |
| Mar 25, 4:57 AM MST | Fire Weather Watch | VEF | 10 hr |
| Mar 25, 3:24 PM MST | Red Flag Warning | VEF | 29 hr |
| Mar 25, 3:33 PM MST | Wind Advisory | VEF | 28 hr |
| Mar 28, 4:34 AM MST | Fire Weather Watch | VEF | 10 hr |
| Mar 28, 2:07 PM MST | Wind Advisory | VEF | 37 hr |
| Mar 28, 2:18 PM MST | Red Flag Warning | VEF | 34 hr |
| Mar 30, 2:58 AM MST | Lake Wind Advisory | VEF | 12 hr |
| Mar 30, 3:51 AM MST | Red Flag Warning | VEF | 12 hr |
| Apr 1, 3:49 PM MST | High Wind Watch | VEF | 30 hr |
| Apr 1, 3:49 PM MST | Wind Advisory | VEF | 53 hr |
| Apr 6, 6:40 AM MST | Fire Weather Watch | VEF | 23 hr |
| Apr 7, 5:12 AM MST | Red Flag Warning | VEF | 16 hr |
| Apr 13, 3:27 PM MST | Wind Advisory | VEF | 36 hr |
| Apr 14, 9:16 AM MST | Lake Wind Advisory | VEF | 18 hr |
| Apr 21, 3:47 PM MST | Fire Weather Watch | VEF | 21 hr |
| Apr 22, 12:52 PM MST | Red Flag Warning | VEF | 3 days |
| Apr 23, 3:11 PM MST | Wind Advisory | VEF | 40 hr |
| Apr 27, 3:55 AM MST | Fire Weather Watch | VEF | 24 hr |
| Apr 28, 3:46 AM MST | Red Flag Warning | VEF | 17 hr |
| May 15, 1:10 PM MST | Excessive Heat Watch | VEF | 24 hr |
| Jun 3, 3:14 PM MST | Red Flag Warning | VEF | 53 hr |
| Jun 4, 3:36 PM MST | Wind Advisory | VEF | 29 hr |
| Jun 19, 3:07 PM MST | Wind Advisory | VEF | 28 hr |
| Jul 2, 5:13 PM MST | Severe Thunderstorm Warning | VEF | 32 min |
| Jul 2, 6:07 PM MST | Areal Flood Advisory | VEF | 85 min |
| Jul 3, 2:22 AM MST | Severe Thunderstorm Warning | VEF | 38 min |
| Jul 3, 3:00 AM MST | Severe Thunderstorm Warning | VEF | 60 min |
| Jul 3, 4:38 AM MST | Flash Flood Warning | VEF | 93 min |
| Jul 3, 1:28 PM MST | Severe Thunderstorm Warning | VEF | 47 min |
| Jul 3, 3:45 PM MST | Mesoscale Discussion | SPC | 60 min |
| Jul 3, 4:03 PM MST | Flash Flood Warning | VEF | 117 min |
| Jul 3, 4:07 PM MST | Severe Thunderstorm Warning | VEF | 23 min |
| Jul 3, 4:27 PM MST | Severe Thunderstorm Warning | VEF | 33 min |
| Jul 3, 5:11 PM MST | Severe Thunderstorm Warning | VEF | 49 min |
| Jul 3, 5:37 PM MST | Flash Flood Warning | VEF | 113 min |
| Jul 5, 2:51 PM MST | Fire Weather Watch | VEF | 37 hr |
| Jul 6, 2:39 PM MST | Red Flag Warning | VEF | 32 hr |
| Jul 7, 2:48 PM MST | Fire Weather Watch | VEF | 13 hr |
| Jul 8, 3:28 AM MST | Red Flag Warning | VEF | 12 hr |
| Jul 15, 2:31 AM MST | Excessive Heat Watch | VEF | 36 hr |
| Jul 16, 2:02 PM MST | Excessive Heat Warning | VEF | 62 hr |
| Jul 16, 2:06 PM MST | Severe Thunderstorm Warning | VEF | 21 min |
| Jul 18, 5:09 PM MST | Severe Thunderstorm Warning | VEF | 36 min |
| Jul 20, 10:45 AM MST | Severe Thunderstorm Warning | VEF | 45 min |
| Jul 20, 11:20 AM MST | Severe Thunderstorm Warning | VEF | 40 min |
| Jul 20, 11:33 AM MST | Severe Thunderstorm Warning | VEF | 42 min |
| Jul 20, 11:50 AM MST | Flash Flood Warning | VEF | 115 min |
| Jul 20, 1:05 PM MST | Flash Flood Warning | VEF | 115 min |
| Jul 20, 1:21 PM MST | Severe Thunderstorm Warning | VEF | 39 min |
| Jul 20, 1:40 PM MST | Flash Flood Warning | VEF | 80 min |
| Jul 20, 2:26 PM MST | High Wind Warning | VEF | 92 min |
| Jul 22, 12:57 AM MST | Severe Thunderstorm Warning | VEF | 48 min |
| Jul 24, 3:43 AM MST | Flash Flood Watch | VEF | 17 hr |
| Jul 24, 1:13 PM MST | Flash Flood Warning | VEF | 3 hr |
| Jul 24, 2:33 PM MST | Flash Flood Warning | VEF | 117 min |
| Jul 28, 9:26 AM MST | Excessive Heat Warning | VEF | 11 hr |
| Aug 4, 6:32 AM MST | Fire Weather Watch | VEF | 8 hr |
| Aug 4, 2:37 PM MST | Red Flag Warning | VEF | 54 hr |
| Aug 5, 3:10 PM MST | Wind Advisory | VEF | 30 hr |
| Aug 13, 2:07 PM MST | Flash Flood Warning | VEF | 3 hr |
| Aug 13, 4:56 PM MST | Areal Flood Advisory | VEF | 3 hr |
| Aug 20, 2:43 PM MST | Excessive Heat Warning | VEF | 28 hr |
| Aug 23, 12:26 PM MST | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 3:11 PM MST | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 23, 4:13 PM MST | Severe Thunderstorm Warning | VEF | 47 min |
| Aug 23, 4:57 PM MST | Severe Thunderstorm Warning | VEF | 34 min |
| Aug 23, 6:47 PM MST | Mesoscale Discussion | SPC | 88 min |
| Aug 27, 3:35 AM MST | Excessive Heat Watch | VEF | 25 hr |
| Aug 27, 3:35 AM MST | Excessive Heat Warning | VEF | 39 hr |
| Aug 28, 4:22 AM MST | Excessive Heat Warning | VEF | 39 hr |
| Sep 4, 3:17 PM MST | Flash Flood Warning | VEF | 2 hr |
| Sep 4, 4:07 PM MST | Severe Thunderstorm Warning | VEF | 53 min |
| Sep 4, 4:16 PM MST | Flash Flood Warning | VEF | 111 min |
| Sep 4, 5:41 PM MST | Severe Thunderstorm Warning | VEF | 49 min |
| Sep 4, 6:26 PM MST | Severe Thunderstorm Warning | VEF | 34 min |
| Sep 4, 9:00 PM MST | Severe Thunderstorm Warning | VEF | 30 min |
| Sep 4, 9:32 PM MST | Areal Flood Advisory | VEF | 118 min |
| Sep 4, 10:29 PM MST | Severe Thunderstorm Warning | VEF | 31 min |
| Sep 4, 10:53 PM MST | Severe Thunderstorm Warning | VEF | 52 min |
| Sep 12, 4:35 PM MST | Flash Flood Warning | VEF | 115 min |
| Sep 21, 2:49 AM MST | Red Flag Warning | VEF | 33 hr |
| Sep 21, 11:07 AM MST | Lake Wind Advisory | VEF | 24 hr |
| Sep 27, 2:05 PM MST | Fire Weather Watch | VEF | 26 hr |
| Sep 28, 3:09 PM MST | Wind Advisory | VEF | 37 hr |
| Sep 28, 3:16 PM MST | Red Flag Warning | VEF | 31 hr |
| Sep 30, 5:16 PM MST | Lake Wind Advisory | VEF | 23 hr |
| Sep 30, 5:17 PM MST | Red Flag Warning | VEF | 23 hr |
| Oct 3, 4:10 AM MST | Fire Weather Watch | VEF | 8 hr |
| Oct 3, 12:27 PM MST | Wind Advisory | VEF | 31 hr |
| Oct 4, 3:03 AM MST | High Wind Warning | VEF | 16 hr |
| Oct 25, 3:43 AM MST | Lake Wind Advisory | VEF | 16 hr |
| Oct 25, 12:28 PM MST | Red Flag Warning | VEF | 8 hr |
| Oct 25, 3:47 PM MST | High Wind Watch | VEF | 23 hr |
| Oct 26, 3:51 AM MST | Fire Weather Watch | VEF | 11 hr |
| Oct 26, 3:02 PM MST | High Wind Warning | VEF | 24 hr |
| Oct 26, 3:19 PM MST | Red Flag Warning | VEF | 23 hr |
| Oct 27, 3:08 PM MST | Wind Advisory | VEF | 29 hr |
| Nov 13, 3:38 PM MST | Wind Advisory | VEF | 49 hr |
| Dec 3, 5:03 AM MST | Freeze Warning | VEF | 50 hr |
| Dec 3, 10:28 AM MST | Wind Advisory | VEF | 10 hr |
| Dec 3, 4:45 PM MST | Red Flag Warning | VEF | 4 hr |
| Dec 5, 4:43 PM MST | Winter Storm Watch | VEF | 23 hr |
| Dec 6, 3:26 PM MST | Winter Storm Warning | VEF | 37 hr |
| Dec 7, 12:00 PM MST | Mesoscale Discussion | SPC | 5 hr |
| Dec 11, 4:53 PM MST | Winter Storm Warning | VEF | 42 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 | 22 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 4 |
| Flooding | |
| Flash Flood Warning | 12 |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 5 |
| Excessive Heat Watch | 3 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 2 |
| Lake Wind Advisory | 10 |
| Wind Advisory | 16 |
| Fire | |
| Red Flag Warning | 16 |
| Fire Weather Watch | 11 |
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.