Alert archive / Iowa / Montgomery County
Weather alerts in Montgomery County, Iowa, 2018
144 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 144
- Warnings
- 26
- Watches
- 20
- Advisories
- 31
- Busiest month
- June38 alerts
- Busiest day
- September 1, 20189 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 2 tornado warnings covering Montgomery County in 2018 had a tornado report inside them.
Montgomery County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 19 | 8 | 58% | 9 | 100% | 16 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Omaha, NE: tornado warnings | 33 | 8 | 76% | 12 | 58% | 13 min |
| NWS Omaha, NE: severe thunderstorm warnings | 289 | 129 | 55% | 310 | 83% | 22 min |
| NWS Omaha, NE: flash flood warnings | 23 | 12 | 48% | 26 | 81% | 92 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 9, 2:48 AM CST | Winter Storm Watch | OAX | 35 hr |
| Jan 10, 3:29 AM CST | Winter Weather Advisory | OAX | 34 hr |
| Jan 14, 3:47 AM CST | Wind Chill Advisory | OAX | 56 hr |
| Jan 26, 10:20 AM CST | Wind Advisory | OAX | 5 hr |
| Feb 5, 11:36 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 6, 2:11 PM CST | Winter Weather Advisory | OAX | 7 hr |
| Feb 9, 3:20 PM CST | Winter Weather Advisory | OAX | 15 hr |
| Feb 18, 3:36 AM CST | Wind Advisory | OAX | 11 hr |
| Feb 19, 3:47 AM CST | Winter Weather Advisory | OAX | 29 hr |
| Feb 21, 3:36 PM CST | Winter Weather Advisory | OAX | 33 hr |
| Feb 23, 4:02 AM CST | Winter Weather Advisory | OAX | 37 hr |
| Feb 28, 7:35 AM CST | Dense Fog Advisory | OAX | 4 hr |
| Mar 4, 2:24 PM CST | Winter Weather Advisory | OAX | 52 hr |
| Mar 5, 3:58 PM CST | Wind Advisory | OAX | 13 hr |
| Apr 2, 3:42 PM CDT | Wind Advisory | OAX | 28 hr |
| Apr 5, 3:56 AM CDT | Winter Weather Advisory | OAX | 38 hr |
| Apr 13, 2:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 2:19 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 13, 3:22 PM CDT | Severe Thunderstorm Warning | OAX | 23 min |
| Apr 13, 4:06 PM CDT | Severe Thunderstorm Warning | OAX | 24 min |
| Apr 13, 4:47 PM CDT | Severe Thunderstorm Warning | OAX | 43 min |
| Apr 13, 5:31 PM CDT | Mesoscale Discussion | SPC | 29 min |
| Apr 13, 6:36 PM CDT | Severe Thunderstorm Warning | OAX | 24 min |
| Apr 29, 3:52 AM CDT | Wind Advisory | OAX | 39 hr |
| May 1, 5:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 7:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 11:52 PM CDT | Special Weather Statement | OAX | 38 min |
| May 2, 5:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| May 3, 2:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| May 3, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 3, 4:39 PM CDT | Special Weather Statement | OAX | 21 min |
| May 3, 4:48 PM CDT | Special Weather Statement | OAX | 27 min |
| May 3, 5:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| May 11, 6:20 AM CDT | Special Weather Statement | OAX | 40 min |
| May 12, 1:04 AM CDT | Mesoscale Discussion | SPC | 116 min |
| May 12, 6:09 AM CDT | Special Weather Statement | OAX | 36 min |
| May 14, 2:42 AM CDT | Special Weather Statement | OAX | 48 min |
| May 28, 2:31 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 2:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 29, 2:17 PM CDT | Special Weather Statement | OAX | 28 min |
| May 29, 2:34 PM CDT | Severe Thunderstorm Warning | OAX | 26 min |
| May 29, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 29, 4:20 PM CDT | Severe Thunderstorm Warning | OAX | 40 min |
| May 29, 4:58 PM CDT | Severe Thunderstorm Warning | OAX | 47 min |
| May 29, 5:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 29, 5:37 PM CDT | Areal Flood Advisory | OAX | 3 hr |
| Jun 1, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 2, 12:50 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 2, 1:11 AM CDT | Special Weather Statement | OAX | 49 min |
| Jun 2, 1:57 AM CDT | Special Weather Statement | OAX | 48 min |
| Jun 6, 2:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 6, 3:23 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 6, 6:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 6, 8:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 6, 10:47 PM CDT | Special Weather Statement | OAX | 43 min |
| Jun 8, 12:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 9, 2:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 9, 4:15 AM CDT | Severe Thunderstorm Warning | OAX | 30 min |
| Jun 10, 1:23 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 11, 11:33 AM CDT | Special Weather Statement | OAX | 12 min |
| Jun 11, 3:42 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 11, 5:46 PM CDT | Severe Thunderstorm Warning | OAX | 44 min |
| Jun 11, 7:00 PM CDT | Tornado Warning | OAX | 30 min |
| Jun 11, 7:27 PM CDT | Severe Thunderstorm Warning | OAX | 48 min |
| Jun 11, 7:31 PM CDT | Tornado Warning | OAX | 29 min |
| Jun 14, 3:30 PM CDT | Heat Advisory | OAX | 3 days |
| Jun 18, 1:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 18, 5:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 19, 12:59 AM CDT | Special Weather Statement | OAX | 46 min |
| Jun 19, 1:23 AM CDT | Severe Thunderstorm Warning | OAX | 41 min |
| Jun 19, 3:16 PM CDT | Flash Flood Watch | OAX | 16 hr |
| Jun 19, 9:47 PM CDT | Special Weather Statement | OAX | 43 min |
| Jun 24, 3:28 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 25, 5:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 8:29 PM CDT | Special Weather Statement | OAX | 31 min |
| Jun 25, 8:35 PM CDT | Severe Thunderstorm Warning | OAX | 25 min |
| Jun 26, 3:30 PM CDT | Heat Advisory | OAX | 3 days |
| Jun 28, 7:20 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 8:12 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 28, 10:57 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 3:09 AM CDT | Flash Flood Watch | OAX | 25 hr |
| Jun 30, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 3:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 30, 8:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 1, 3:06 AM CDT | Special Weather Statement | OAX | 39 min |
| Jul 4, 3:42 AM CDT | Heat Advisory | OAX | 16 hr |
| Jul 4, 10:31 PM CDT | Special Weather Statement | OAX | 29 min |
| Jul 4, 11:04 PM CDT | Special Weather Statement | OAX | 56 min |
| Jul 10, 3:25 PM CDT | Heat Advisory | OAX | 53 hr |
| Jul 13, 3:53 AM CDT | Flash Flood Watch | OAX | 17 hr |
| Jul 13, 2:36 PM CDT | Special Weather Statement | OAX | 24 min |
| Jul 13, 3:11 PM CDT | Special Weather Statement | OAX | 34 min |
| Jul 13, 3:34 PM CDT | Special Weather Statement | OAX | 41 min |
| Jul 15, 5:43 AM CDT | Dense Fog Advisory | OAX | 3 hr |
| Jul 19, 7:54 AM CDT | Special Weather Statement | OAX | 51 min |
| Jul 25, 7:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 5, 9:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 6:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 2:00 PM CDT | Flash Flood Watch | OAX | 25 hr |
| Aug 20, 8:54 AM CDT | Areal Flood Warning | OAX | 15 hr |
| Aug 25, 3:24 AM CDT | Dense Fog Advisory | OAX | 6 hr |
| Aug 26, 11:12 PM CDT | Special Weather Statement | OAX | 48 min |
| Aug 31, 1:10 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 31, 8:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Sep 1, 12:42 AM CDT | Special Weather Statement | OAX | 33 min |
| Sep 1, 1:10 AM CDT | Severe Thunderstorm Warning | OAX | 35 min |
| Sep 1, 5:36 AM CDT | Severe Thunderstorm Warning | OAX | 24 min |
| Sep 1, 5:58 AM CDT | Severe Thunderstorm Warning | OAX | 32 min |
| Sep 1, 6:09 AM CDT | Special Weather Statement | OAX | 36 min |
| Sep 1, 6:19 AM CDT | Severe Thunderstorm Warning | OAX | 41 min |
| Sep 1, 5:15 PM CDT | Flash Flood Watch | OAX | 44 hr |
| Sep 1, 6:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Sep 1, 8:20 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 1, 9:08 PM CDT | Severe Thunderstorm Warning | OAX | 52 min |
| Sep 1, 10:26 PM CDT | Severe Thunderstorm Warning | OAX | 34 min |
| Sep 1, 10:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Sep 2, 2:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 3, 1:06 PM CDT | Flash Flood Watch | OAX | 45 hr |
| Sep 18, 3:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Sep 18, 5:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Sep 20, 2:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 20, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 20, 5:48 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Sep 20, 8:49 PM CDT | Severe Thunderstorm Warning | OAX | 26 min |
| Sep 25, 9:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 3, 12:09 PM CDT | Wind Advisory | OAX | 9 hr |
| Oct 5, 2:39 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 6, 3:30 PM CDT | Flood Watch | OAX | 3 days |
| Oct 9, 9:24 AM CDT | River Flood Warning | OAX | 18 hr |
| Oct 13, 3:27 PM CDT | Freeze Watch | OAX | 12 hr |
| Oct 14, 3:10 AM CDT | Freeze Warning | OAX | 31 hr |
| Nov 17, 3:12 AM CST | Winter Weather Advisory | OAX | 21 hr |
| Nov 23, 3:15 AM CST | Winter Storm Watch | OAX | 24 hr |
| Nov 23, 9:49 PM CST | Winter Weather Advisory | OAX | 38 hr |
| Nov 24, 1:32 PM CST | Blizzard Warning | OAX | 28 hr |
| Nov 25, 3:54 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Nov 25, 11:42 AM CST | Winter Weather Advisory | OAX | 6 hr |
| Nov 29, 3:09 PM CST | Winter Storm Warning | OAX | 3 days |
| Nov 29, 9:45 PM CST | Dense Fog Advisory | OAX | 14 hr |
| Nov 30, 3:24 PM CST | Winter Weather Advisory | OAX | 51 hr |
| Dec 1, 7:01 AM CST | Wind Advisory | OAX | 4 hr |
| Dec 14, 5:27 AM CST | Dense Fog Advisory | OAX | 4 hr |
| Dec 14, 9:17 AM CST | Dense Fog Advisory | OAX | 93 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 | 19 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 43 |
| Special Weather Statement | 24 |
| Flooding | |
| Areal Flood Warning | 1 |
| River Flood Warning | 1 |
| Flash Flood Watch | 6 |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.