Alert archive / Iowa / Decatur County
Weather alerts in Decatur County, Iowa, 2014
148 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Decatur County and its neighbors
Each county as a circle sized by its count in 2014. Tap one for its archive.
- Alerts
- 148
- Warnings
- 35
- Watches
- 30
- Advisories
- 36
- Busiest month
- June33 alerts
- Busiest day
- June 4, 20149 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 Decatur County in 2014 had a tornado report inside them.
Decatur County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 19 | 6 | 68% | 8 | 100% | 17 min |
| Flash flood warnings | 6 | 4 | 33% | 1 | 100% | 157 min |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 57 | 15 | 74% | 46 | 48% | 12 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 301 | 149 | 50% | 487 | 85% | 25 min |
| NWS Des Moines, IA: flash flood warnings | 62 | 29 | 53% | 69 | 84% | 111 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 1, 3:55 AM CST | Winter Weather Advisory | DMX | 14 hr |
| Jan 1, 3:26 PM CST | Wind Chill Advisory | DMX | 21 hr |
| Jan 3, 3:36 PM CST | Wind Chill Watch | DMX | 13 hr |
| Jan 4, 4:14 AM CST | Wind Chill Warning | DMX | 72 hr |
| Jan 6, 3:39 PM CST | Wind Chill Advisory | DMX | 17 hr |
| Jan 9, 4:08 PM CST | Freezing Rain Advisory | DMX | 29 hr |
| Jan 10, 7:51 PM CST | Dense Fog Advisory | DMX | 4 hr |
| Jan 13, 3:07 PM CST | Wind Advisory | DMX | 27 hr |
| Jan 15, 3:51 PM CST | Wind Advisory | DMX | 29 hr |
| Jan 17, 3:55 PM CST | Wind Advisory | DMX | 26 hr |
| Jan 20, 3:42 AM CST | Wind Chill Advisory | DMX | 32 hr |
| Jan 20, 3:36 PM CST | Wind Advisory | DMX | 8 hr |
| Jan 22, 4:07 AM CST | Wind Chill Advisory | DMX | 44 hr |
| Jan 25, 3:35 PM CST | High Wind Warning | DMX | 31 hr |
| Jan 25, 3:35 PM CST | Wind Advisory | DMX | 32 hr |
| Jan 26, 4:45 AM CST | Wind Chill Advisory | DMX | 31 hr |
| Jan 30, 3:33 PM CST | Winter Storm Watch | DMX | 12 hr |
| Jan 31, 3:53 AM CST | Winter Weather Advisory | DMX | 27 hr |
| Feb 2, 3:30 PM CST | Winter Storm Watch | DMX | 24 hr |
| Feb 3, 3:45 PM CST | Winter Storm Warning | DMX | 41 hr |
| Feb 4, 11:38 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 5, 3:18 PM CST | Wind Chill Advisory | DMX | 21 hr |
| Feb 6, 3:33 PM CST | Wind Chill Advisory | DMX | 17 hr |
| Feb 9, 3:40 AM CST | Wind Chill Advisory | DMX | 31 hr |
| Feb 16, 4:52 AM CST | Winter Weather Advisory | DMX | 31 hr |
| Feb 19, 3:43 PM CST | Winter Weather Advisory | DMX | 38 hr |
| Feb 20, 4:24 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 20, 10:20 AM CST | Mesoscale Discussion | SPC | 85 min |
| Feb 20, 11:15 AM CST | Severe Thunderstorm Warning | DMX | 30 min |
| Feb 28, 4:26 PM CST | Wind Chill Advisory | DMX | 63 hr |
| Feb 28, 4:26 PM CST | Winter Weather Advisory | DMX | 35 hr |
| Mar 11, 1:44 PM CDT | Wind Advisory | DMX | 8 hr |
| Mar 27, 3:56 PM CDT | Severe Thunderstorm Warning | DMX | 34 min |
| Mar 31, 3:58 AM CDT | Wind Advisory | DMX | 27 hr |
| Mar 31, 3:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Apr 3, 1:05 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Apr 3, 3:54 PM CDT | Wind Advisory | DMX | 23 hr |
| Apr 9, 3:56 AM CDT | Red Flag Warning | DMX | 15 hr |
| Apr 12, 6:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 12, 9:12 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Apr 12, 10:15 PM CDT | Severe Thunderstorm Warning | DMX | 45 min |
| Apr 12, 11:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 13, 7:41 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 3:37 PM CDT | Flood Watch | DMX | 6 hr |
| Apr 15, 3:44 PM CDT | Fire Weather Watch | DMX | 12 hr |
| Apr 16, 4:13 AM CDT | Red Flag Warning | DMX | 14 hr |
| Apr 16, 4:21 AM CDT | Wind Advisory | DMX | 14 hr |
| Apr 27, 11:23 AM CDT | Tornado Watch | SPC | 8 hr |
| Apr 27, 1:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| May 8, 1:46 PM CDT | Tornado Watch | SPC | 7 hr |
| May 8, 5:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 8, 7:02 PM CDT | Severe Thunderstorm Warning | DMX | 43 min |
| May 10, 2:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 10, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 11, 9:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| May 11, 10:14 AM CDT | Special Weather Statement | DMX | 61 min |
| May 11, 10:47 AM CDT | Mesoscale Discussion | SPC | 118 min |
| May 11, 11:47 AM CDT | Severe Thunderstorm Warning | DMX | 43 min |
| May 11, 11:53 AM CDT | Tornado Watch | SPC | 7 hr |
| May 11, 12:26 PM CDT | Flash Flood Warning | DMX | 3 hr |
| May 11, 7:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 11, 7:49 PM CDT | Tornado Watch | SPC | 7 hr |
| May 11, 11:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 12, 10:34 AM CDT | Flash Flood Watch | DMX | 7 hr |
| May 12, 11:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 1:39 PM CDT | Severe Thunderstorm Warning | DMX | 36 min |
| May 15, 3:45 PM CDT | Frost Advisory | DMX | 15 hr |
| May 16, 3:21 PM CDT | Frost Advisory | DMX | 16 hr |
| May 20, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 21, 12:49 AM CDT | Severe Thunderstorm Warning | DMX | 41 min |
| May 21, 1:27 AM CDT | Mesoscale Discussion | SPC | 93 min |
| May 21, 1:30 AM CDT | Severe Thunderstorm Warning | DMX | 30 min |
| May 21, 3:03 AM CDT | Special Weather Statement | DMX | 57 min |
| Jun 3, 4:17 AM CDT | Flash Flood Watch | DMX | 23 hr |
| Jun 3, 10:39 AM CDT | River Flood Warning | DMX | 4 days |
| Jun 3, 1:12 PM CDT | Tornado Watch | SPC | 10 hr |
| Jun 3, 4:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 3, 5:27 PM CDT | Severe Thunderstorm Warning | DMX | 63 min |
| Jun 3, 5:59 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 3, 7:01 PM CDT | Severe Thunderstorm Warning | DMX | 59 min |
| Jun 3, 7:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 3, 7:21 PM CDT | Tornado Warning | DMX | 24 min |
| Jun 3, 7:45 PM CDT | Severe Thunderstorm Warning | DMX | 45 min |
| Jun 3, 7:52 PM CDT | Flash Flood Warning | DMX | 6 hr |
| Jun 3, 9:21 PM CDT | Severe Thunderstorm Warning | DMX | 24 min |
| Jun 3, 9:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 3, 9:57 PM CDT | Severe Thunderstorm Warning | DMX | 48 min |
| Jun 3, 10:10 PM CDT | Tornado Warning | DMX | 35 min |
| Jun 15, 3:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 16, 10:19 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 16, 9:56 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 17, 1:29 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 20, 11:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 22, 12:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 22, 1:19 PM CDT | Severe Thunderstorm Warning | DMX | 26 min |
| Jun 26, 2:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 2:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 28, 2:06 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 29, 4:04 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 29, 6:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 29, 7:32 PM CDT | Flash Flood Watch | DMX | 22 hr |
| Jun 29, 10:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 30, 4:06 AM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 30, 9:38 AM CDT | Tornado Watch | SPC | 10 hr |
| Jun 30, 1:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 30, 3:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 6, 10:26 PM CDT | Special Weather Statement | DMX | 34 min |
| Jul 7, 3:38 AM CDT | Flash Flood Watch | DMX | 19 hr |
| Jul 7, 7:21 PM CDT | Severe Thunderstorm Warning | DMX | 39 min |
| Jul 7, 7:51 PM CDT | Severe Thunderstorm Warning | DMX | 39 min |
| Jul 7, 7:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 12, 3:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 12, 4:58 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 12, 6:10 PM CDT | Severe Thunderstorm Warning | DMX | 14 min |
| Jul 12, 7:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 20, 3:23 PM CDT | Heat Advisory | DMX | 52 hr |
| Aug 6, 3:28 PM CDT | Flash Flood Watch | DMX | 13 hr |
| Aug 6, 8:47 PM CDT | Special Weather Statement | DMX | 28 min |
| Aug 6, 9:58 PM CDT | Special Weather Statement | DMX | 32 min |
| Aug 16, 9:45 AM CDT | River Flood Warning | DMX | 44 hr |
| Aug 17, 4:36 AM CDT | Dense Fog Advisory | DMX | 4 hr |
| Aug 20, 2:40 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 3:53 PM CDT | Flash Flood Watch | DMX | 19 hr |
| Aug 28, 1:12 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 31, 3:43 PM CDT | Flash Flood Watch | DMX | 9 hr |
| Aug 31, 7:12 PM CDT | Tornado Watch | SPC | 6 hr |
| Aug 31, 9:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Sep 9, 3:56 AM CDT | Flash Flood Watch | DMX | 24 hr |
| Sep 9, 12:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Sep 9, 3:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Sep 9, 3:34 PM CDT | Tornado Watch | SPC | 8 hr |
| Sep 9, 5:41 PM CDT | Severe Thunderstorm Warning | DMX | 49 min |
| Sep 9, 6:18 PM CDT | Flash Flood Warning | DMX | 12 hr |
| Sep 9, 6:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Sep 9, 6:48 PM CDT | Flash Flood Warning | DMX | 6 hr |
| Sep 9, 7:07 PM CDT | Flash Flood Warning | DMX | 11 hr |
| Sep 9, 7:14 PM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Sep 9, 9:49 PM CDT | River Flood Warning | DMX | 3 days |
| Sep 10, 12:46 AM CDT | Flash Flood Warning | DMX | 6 hr |
| Sep 18, 9:12 AM CDT | Special Weather Statement | DMX | 63 min |
| Sep 26, 9:01 PM CDT | Special Weather Statement | DMX | 59 min |
| Oct 1, 11:12 PM CDT | Dense Fog Advisory | DMX | 10 hr |
| Oct 10, 3:15 PM CDT | Frost Advisory | DMX | 18 hr |
| Oct 23, 3:58 PM CDT | Dense Fog Advisory | DMX | 18 hr |
| Oct 24, 9:12 PM CDT | Dense Fog Advisory | DMX | 8 hr |
| Nov 14, 3:39 AM CST | Winter Weather Advisory | DMX | 44 hr |
| Nov 21, 3:48 AM CST | Freezing Rain Advisory | DMX | 26 hr |
| Dec 5, 1:26 AM CST | Dense Fog Advisory | DMX | 9 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20132015
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.