Alert archive / Iowa / Montgomery County
Weather alerts in Montgomery County, Iowa, 2015
137 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Montgomery County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 137
- Warnings
- 26
- Watches
- 24
- Advisories
- 31
- Busiest month
- July23 alerts
- Busiest day
- July 25, 20157 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Montgomery County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 3 | 77% | 4 | 75% | 4 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Omaha, NE: tornado warnings | 22 | 7 | 68% | 10 | 80% | 11 min |
| NWS Omaha, NE: severe thunderstorm warnings | 262 | 116 | 56% | 220 | 82% | 18 min |
| NWS Omaha, NE: flash flood warnings | 26 | 11 | 58% | 30 | 97% | 88 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 3, 3:53 AM CST | Winter Weather Advisory | OAX | 25 hr |
| Jan 3, 11:51 AM CST | Wind Chill Advisory | OAX | 23 hr |
| Jan 6, 2:37 PM CST | Wind Chill Advisory | OAX | 21 hr |
| Jan 28, 3:15 PM CST | Wind Advisory | OAX | 16 hr |
| Jan 31, 5:11 AM CST | Winter Storm Warning | OAX | 37 hr |
| Jan 31, 5:11 AM CST | Winter Weather Advisory | OAX | 38 hr |
| Feb 3, 4:16 PM CST | Winter Weather Advisory | OAX | 21 hr |
| Feb 4, 7:34 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 10:22 PM CST | Special Weather Statement | OAX | 3 hr |
| Feb 17, 3:15 PM CST | Wind Chill Advisory | OAX | 19 hr |
| Feb 19, 12:29 PM CST | Special Weather Statement | OAX | 16 min |
| Feb 24, 3:32 PM CST | Winter Weather Advisory | OAX | 25 hr |
| Mar 3, 7:06 AM CST | Freezing Rain Advisory | OAX | 3 hr |
| Mar 12, 3:29 AM CDT | Fire Weather Watch | OAX | 11 hr |
| Mar 14, 3:42 AM CDT | Fire Weather Watch | OAX | 24 hr |
| Mar 14, 3:08 PM CDT | Red Flag Warning | OAX | 29 hr |
| Mar 15, 3:48 AM CDT | Fire Weather Watch | OAX | 23 hr |
| Mar 16, 3:10 AM CDT | Red Flag Warning | OAX | 17 hr |
| Mar 20, 5:06 AM CDT | Dense Fog Advisory | OAX | 4 hr |
| Mar 25, 3:30 AM CDT | Dense Fog Advisory | OAX | 7 hr |
| Mar 29, 3:56 AM CDT | Red Flag Warning | OAX | 12 hr |
| Mar 30, 3:54 AM CDT | Red Flag Warning | OAX | 15 hr |
| Apr 1, 12:35 PM CDT | Wind Advisory | OAX | 5 hr |
| Apr 1, 11:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 1, 11:51 PM CDT | Special Weather Statement | OAX | 39 min |
| May 3, 3:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 4, 2:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 6, 7:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 7, 4:25 PM CDT | Special Weather Statement | OAX | 50 min |
| May 7, 4:41 PM CDT | Severe Thunderstorm Warning | OAX | 34 min |
| May 7, 7:16 PM CDT | Areal Flood Warning | OAX | 6 hr |
| May 7, 7:33 PM CDT | Special Weather Statement | OAX | 57 min |
| May 10, 1:47 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 10, 6:28 PM CDT | Special Weather Statement | OAX | 47 min |
| May 14, 11:44 PM CDT | Dense Fog Advisory | OAX | 7 hr |
| May 16, 3:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 17, 7:15 PM CDT | Special Weather Statement | OAX | 45 min |
| May 25, 5:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 25, 5:33 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 25, 8:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 4, 1:14 PM CDT | Flash Flood Watch | OAX | 17 hr |
| Jun 10, 3:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 10, 10:35 PM CDT | Flash Flood Watch | OAX | 13 hr |
| Jun 11, 9:52 AM CDT | River Flood Warning | OAX | 66 hr |
| Jun 11, 11:56 AM CDT | Flash Flood Watch | OAX | 7 hr |
| Jun 11, 1:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 11, 1:53 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 15, 10:17 AM CDT | River Flood Warning | OAX | 43 hr |
| Jun 20, 3:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 1:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 24, 12:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 24, 7:31 AM CDT | Special Weather Statement | OAX | 29 min |
| Jun 24, 10:19 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 24, 2:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 6:21 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 24, 7:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 11, 11:59 AM CDT | Heat Advisory | OAX | 32 hr |
| Jul 12, 3:32 PM CDT | Heat Advisory | OAX | 28 hr |
| Jul 15, 9:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 15, 11:52 PM CDT | Flash Flood Watch | OAX | 10 hr |
| Jul 16, 3:06 AM CDT | Severe Thunderstorm Warning | OAX | 54 min |
| Jul 16, 3:22 AM CDT | Severe Thunderstorm Warning | OAX | 53 min |
| Jul 16, 2:55 PM CDT | Heat Advisory | OAX | 29 hr |
| Jul 16, 2:55 PM CDT | Heat Advisory | OAX | 47 hr |
| Jul 23, 3:07 PM CDT | Heat Advisory | OAX | 29 hr |
| Jul 24, 6:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 24, 7:49 PM CDT | Severe Thunderstorm Warning | OAX | 26 min |
| Jul 24, 8:16 PM CDT | Special Weather Statement | OAX | 44 min |
| Jul 25, 12:33 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 25, 1:58 AM CDT | Special Weather Statement | OAX | 32 min |
| Jul 25, 2:05 AM CDT | Severe Thunderstorm Warning | OAX | 25 min |
| Jul 25, 2:31 AM CDT | Severe Thunderstorm Warning | OAX | 29 min |
| Jul 25, 2:48 PM CDT | Heat Advisory | OAX | 28 hr |
| Jul 28, 3:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 5:46 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 28, 6:27 PM CDT | Special Weather Statement | OAX | 48 min |
| Jul 28, 6:49 PM CDT | Severe Thunderstorm Warning | OAX | 26 min |
| Jul 28, 8:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 31, 5:53 PM CDT | Special Weather Statement | OAX | 67 min |
| Aug 2, 4:48 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 6:11 PM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| Aug 2, 6:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 2, 6:47 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 2, 10:08 PM CDT | Special Weather Statement | OAX | 37 min |
| Aug 3, 11:44 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 8, 8:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 8, 8:51 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 8, 9:21 PM CDT | Severe Thunderstorm Warning | OAX | 39 min |
| Aug 8, 9:45 PM CDT | Severe Thunderstorm Warning | OAX | 33 min |
| Aug 8, 11:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 9, 1:37 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 10, 12:57 AM CDT | Special Weather Statement | OAX | 33 min |
| Aug 18, 5:48 AM CDT | Areal Flood Advisory | OAX | 3 hr |
| Aug 22, 2:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Aug 22, 3:48 PM CDT | Tornado Watch | SPC | 8 hr |
| Aug 22, 6:21 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 22, 6:50 PM CDT | Severe Thunderstorm Warning | OAX | 40 min |
| Aug 22, 7:14 PM CDT | Severe Thunderstorm Warning | OAX | 25 min |
| Aug 22, 8:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Sep 6, 4:24 AM CDT | Flash Flood Watch | OAX | 24 hr |
| Sep 6, 5:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Sep 6, 6:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 6, 8:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Sep 6, 11:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Sep 7, 4:19 AM CDT | Flash Flood Watch | OAX | 22 hr |
| Sep 17, 5:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Sep 18, 9:25 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Sep 22, 6:09 PM CDT | Special Weather Statement | OAX | 36 min |
| Sep 23, 4:31 AM CDT | Flash Flood Watch | OAX | 28 hr |
| Oct 15, 4:15 AM CDT | Frost Advisory | OAX | 29 hr |
| Oct 16, 3:11 PM CDT | Frost Advisory | OAX | 17 hr |
| Oct 19, 3:29 AM CDT | Red Flag Warning | OAX | 12 hr |
| Oct 23, 6:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Oct 28, 2:35 AM CDT | Freeze Watch | OAX | 13 hr |
| Nov 10, 3:28 AM CST | High Wind Watch | OAX | 24 hr |
| Nov 10, 3:25 PM CST | Wind Advisory | OAX | 36 hr |
| Nov 11, 10:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Nov 11, 11:25 AM CST | Tornado Watch | SPC | 6 hr |
| Nov 11, 1:37 PM CST | Special Weather Statement | OAX | 23 min |
| Nov 11, 1:42 PM CST | Mesoscale Discussion | SPC | 93 min |
| Nov 11, 1:43 PM CST | Severe Thunderstorm Warning | OAX | 20 min |
| Nov 12, 2:55 AM CST | Wind Advisory | OAX | 13 hr |
| Nov 18, 3:39 PM CST | Wind Advisory | OAX | 25 hr |
| Nov 20, 4:14 AM CST | Winter Weather Advisory | OAX | 16 hr |
| Nov 24, 3:09 PM CST | Winter Storm Watch | OAX | 37 hr |
| Nov 25, 3:33 PM CST | Winter Storm Warning | OAX | 35 hr |
| Nov 25, 3:33 PM CST | Winter Weather Advisory | OAX | 35 hr |
| Nov 26, 7:18 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Nov 28, 2:59 PM CST | Winter Weather Advisory | OAX | 15 hr |
| Nov 29, 3:34 PM CST | Winter Weather Advisory | OAX | 26 hr |
| Dec 6, 8:12 PM CST | Dense Fog Advisory | OAX | 11 hr |
| Dec 12, 7:48 PM CST | Special Weather Statement | OAX | 27 min |
| Dec 13, 8:11 AM CST | River Flood Warning | OAX | 3 days |
| Dec 26, 3:20 PM CST | Winter Storm Watch | OAX | 24 hr |
| Dec 27, 3:33 PM CST | Winter Storm Warning | OAX | 34 hr |
| Dec 27, 3:33 PM CST | Winter Weather Advisory | OAX | 34 hr |
| Dec 28, 4:14 AM CST | Winter Storm Warning | OAX | 16 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 | 13 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 39 |
| Special Weather Statement | 17 |
| Flooding | |
| Areal Flood Warning | 1 |
| River Flood Warning | 3 |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 5 |
| Fire Weather Watch | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.