Alert archive / Indiana / Decatur County
Weather alerts in Decatur County, Indiana, 2017
103 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 103
- Warnings
- 33
- Watches
- 17
- Advisories
- 18
- Busiest month
- April19 alerts
- Busiest day
- April 5, 20179 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 1 tornado warnings covering Decatur County in 2017 had a tornado report inside them.
Decatur County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 17 | 6 | 65% | 5 | 80% | 20 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Indianapolis, IN: tornado warnings | 29 | 4 | 86% | 11 | 45% | 8 min |
| NWS Indianapolis, IN: severe thunderstorm warnings | 171 | 82 | 52% | 261 | 71% | 19 min |
| NWS Indianapolis, IN: flash flood warnings | 27 | 9 | 67% | 12 | 75% | 110 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 9:53 PM EST | Dense Fog Advisory | IND | 13 hr |
| Jan 4, 3:12 PM EST | Winter Weather Advisory | IND | 28 hr |
| Jan 10, 4:00 AM EST | Wind Advisory | IND | 18 hr |
| Jan 10, 8:14 PM EST | Severe Thunderstorm Warning | IND | 46 min |
| Jan 12, 10:42 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 12, 3:09 PM EST | Winter Weather Advisory | IND | 352 days |
| Jan 12, 9:09 PM EST | Freezing Rain Advisory | IND | 46 hr |
| Jan 20, 7:20 AM EST | Areal Flood Warning | IND | 9 hr |
| Feb 7, 12:20 AM EST | Mesoscale Discussion | SPC | 115 min |
| Feb 20, 12:44 AM EST | Dense Fog Advisory | IND | 10 hr |
| Feb 24, 3:44 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 24, 4:51 PM EST | Special Weather Statement | IND | 24 min |
| Feb 24, 5:14 PM EST | Special Weather Statement | IND | 46 min |
| Feb 24, 5:20 PM EST | Severe Thunderstorm Warning | IND | 25 min |
| Feb 24, 5:27 PM EST | Severe Thunderstorm Warning | IND | 33 min |
| Feb 24, 5:42 PM EST | Severe Thunderstorm Warning | IND | 33 min |
| Feb 24, 5:56 PM EST | Severe Thunderstorm Warning | IND | 19 min |
| Feb 24, 5:56 PM EST | Mesoscale Discussion | SPC | 94 min |
| Feb 28, 9:29 PM EST | Tornado Watch | SPC | 12 hr |
| Feb 28, 11:03 PM EST | Mesoscale Discussion | SPC | 117 min |
| Mar 1, 5:36 AM EST | Severe Thunderstorm Warning | IND | 39 min |
| Mar 17, 11:50 PM EDT | Dense Fog Advisory | IND | 6 hr |
| Mar 20, 12:19 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 30, 1:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 30, 3:03 PM EDT | Tornado Watch | SPC | 5 hr |
| Mar 30, 7:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 5, 2:59 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 5, 3:44 PM EDT | Wind Advisory | IND | 30 hr |
| Apr 5, 4:08 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 5, 4:15 PM EDT | Severe Thunderstorm Warning | IND | 30 min |
| Apr 5, 4:32 PM EDT | Severe Thunderstorm Warning | IND | 13 min |
| Apr 5, 4:41 PM EDT | Severe Thunderstorm Warning | IND | 30 min |
| Apr 5, 5:22 PM EDT | Areal Flood Warning | IND | 3 hr |
| Apr 5, 5:40 PM EDT | Severe Thunderstorm Warning | IND | 35 min |
| Apr 5, 5:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 7, 3:36 AM EDT | Frost Advisory | IND | 29 hr |
| Apr 7, 3:28 PM EDT | Freeze Warning | IND | 18 hr |
| Apr 28, 11:31 AM EDT | Flash Flood Watch | IND | 66 hr |
| Apr 28, 6:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Apr 28, 7:43 PM EDT | Severe Thunderstorm Warning | IND | 32 min |
| Apr 28, 7:47 PM EDT | Tornado Warning | IND | 28 min |
| Apr 28, 8:10 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 28, 8:13 PM EDT | Severe Thunderstorm Warning | IND | 11 min |
| Apr 28, 8:36 PM EDT | Areal Flood Advisory | IND | 3 hr |
| Apr 29, 7:35 AM EDT | Areal Flood Warning | IND | 6 hr |
| May 3, 2:38 AM EDT | Flash Flood Watch | IND | 64 hr |
| May 5, 8:03 AM EDT | Areal Flood Warning | IND | 24 hr |
| May 5, 5:36 PM EDT | River Flood Warning | IND | 30 hr |
| May 7, 3:28 AM EDT | Frost Advisory | IND | 29 hr |
| May 9, 8:44 AM EDT | Areal Flood Advisory | IND | 3 hr |
| May 10, 8:07 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 10, 10:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 11, 12:03 AM EDT | Severe Thunderstorm Warning | IND | 25 min |
| May 19, 1:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 20, 12:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 20, 6:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 11:47 AM EDT | Mesoscale Discussion | SPC | 58 min |
| May 26, 7:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 26, 8:09 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 26, 10:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 5, 3:37 PM EDT | Special Weather Statement | IND | 23 min |
| Jun 13, 11:15 AM EDT | Special Weather Statement | IND | 45 min |
| Jun 13, 11:33 AM EDT | Areal Flood Advisory | IND | 3 hr |
| Jun 13, 11:33 AM EDT | Special Weather Statement | IND | 42 min |
| Jun 13, 12:18 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 12:56 PM EDT | Special Weather Statement | IND | 49 min |
| Jun 14, 1:44 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 14, 10:35 PM EDT | Areal Flood Advisory | IND | 5 hr |
| Jun 14, 11:58 PM EDT | Areal Flood Warning | IND | 3 hr |
| Jun 15, 2:58 AM EDT | Areal Flood Warning | IND | 12 hr |
| Jun 15, 6:03 AM EDT | Areal Flood Warning | IND | 9 hr |
| Jun 22, 2:31 PM EDT | Flash Flood Watch | IND | 28 hr |
| Jun 23, 10:17 AM EDT | Areal Flood Warning | IND | 6 hr |
| Jun 30, 1:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 1:45 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 3:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 7, 5:30 PM EDT | Severe Thunderstorm Warning | IND | 45 min |
| Jul 8, 1:22 AM EDT | Dense Fog Advisory | IND | 8 hr |
| Jul 10, 9:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 9:23 AM EDT | Special Weather Statement | IND | 37 min |
| Jul 11, 1:22 PM EDT | Severe Thunderstorm Warning | IND | 38 min |
| Jul 12, 1:49 PM EDT | Flash Flood Watch | IND | 38 hr |
| Jul 17, 1:39 AM EDT | Areal Flood Warning | IND | 3 hr |
| Jul 17, 1:50 AM EDT | Severe Thunderstorm Warning | IND | 28 min |
| Jul 22, 2:08 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 17, 12:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 29, 3:35 AM EDT | Areal Flood Advisory | IND | 3 hr |
| Sep 4, 10:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Oct 25, 3:40 AM EDT | Frost Advisory | IND | 29 hr |
| Oct 28, 2:54 AM EDT | Freeze Warning | IND | 27 hr |
| Oct 30, 3:21 AM EDT | Freeze Warning | IND | 30 hr |
| Nov 5, 3:20 AM EST | Flash Flood Watch | IND | 25 hr |
| Nov 5, 11:48 AM EST | Mesoscale Discussion | SPC | 57 min |
| Nov 5, 12:08 PM EST | Tornado Watch | SPC | 7 hr |
| Nov 5, 5:58 PM EST | Mesoscale Discussion | SPC | 62 min |
| Nov 5, 6:31 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Nov 5, 7:32 PM EST | Areal Flood Warning | IND | 3 hr |
| Nov 5, 7:43 PM EST | Severe Thunderstorm Warning | IND | 32 min |
| Nov 5, 10:55 PM EST | Areal Flood Warning | IND | 3 hr |
| Nov 6, 1:39 AM EST | Special Weather Statement | IND | 51 min |
| Nov 17, 3:31 PM EST | Wind Advisory | IND | 31 hr |
| Nov 18, 12:04 PM EST | Severe Thunderstorm Watch | SPC | 8 hr |
| Nov 18, 2:48 PM EST | Mesoscale Discussion | SPC | 57 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 | 17 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 8 |
| Flooding | |
| Areal Flood Warning | 11 |
| River Flood Warning | 1 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 5 |
| Winter | |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 2 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 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 archive20162018
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.