Alert archive / Indiana / DeKalb County
Weather alerts in DeKalb County, Indiana, 2017
120 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
DeKalb County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 120
- Warnings
- 28
- Watches
- 14
- Advisories
- 26
- Busiest month
- March18 alerts
- Busiest day
- March 1, 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.
DeKalb County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 11 | 27% | 7 | 71% | 10 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 Northern Indiana: tornado warnings | 26 | 6 | 77% | 17 | 71% | 10 min |
| NWS Northern Indiana: severe thunderstorm warnings | 126 | 61 | 52% | 263 | 56% | 17 min |
| NWS Northern Indiana: flash flood warnings | 9 | 3 | 67% | 12 | 75% | 103 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 3, 4:01 AM EST | Dense Fog Advisory | IWX | 8 hr |
| Jan 8, 12:06 AM EST | Special Weather Statement | IWX | 39 min |
| Jan 8, 12:55 AM EST | Special Weather Statement | IWX | 35 min |
| Jan 9, 2:25 PM EST | Winter Weather Advisory | IWX | 21 hr |
| Jan 10, 4:05 AM EST | Wind Advisory | IWX | 19 hr |
| Jan 10, 6:49 PM EST | Special Weather Statement | IWX | 41 min |
| Jan 12, 7:53 AM EST | Special Weather Statement | IWX | 37 min |
| Jan 12, 4:26 PM EST | River Flood Warning | IWX | 5 days |
| Jan 16, 1:21 PM EST | Dense Fog Advisory | IWX | 11 hr |
| Jan 21, 2:28 PM EST | Dense Fog Advisory | IWX | 38 hr |
| Jan 22, 3:37 PM EST | Dense Fog Advisory | IWX | 12 hr |
| Jan 28, 5:02 PM EST | Special Weather Statement | IWX | 58 min |
| Jan 30, 3:10 PM EST | Winter Weather Advisory | IWX | 18 hr |
| Feb 7, 12:40 AM EST | Dense Fog Advisory | IWX | 6 hr |
| Feb 11, 8:47 PM EST | River Flood Warning | IWX | 44 hr |
| Feb 12, 10:45 AM EST | Wind Advisory | IWX | 9 hr |
| Feb 19, 7:43 AM EST | Dense Fog Advisory | IWX | 3 hr |
| Feb 24, 3:07 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 24, 3:44 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 24, 5:56 PM EST | Mesoscale Discussion | SPC | 94 min |
| Feb 27, 10:06 AM EST | River Flood Warning | IWX | 3 days |
| Feb 28, 6:13 PM EST | Special Weather Statement | IWX | 47 min |
| Feb 28, 6:26 PM EST | Severe Thunderstorm Warning | IWX | 34 min |
| Feb 28, 6:45 PM EST | Severe Thunderstorm Warning | IWX | 30 min |
| Feb 28, 7:00 PM EST | Mesoscale Discussion | SPC | 90 min |
| Feb 28, 7:37 PM EST | Severe Thunderstorm Watch | SPC | 8 hr |
| Feb 28, 9:41 PM EST | Mesoscale Discussion | SPC | 94 min |
| Feb 28, 11:03 PM EST | Mesoscale Discussion | SPC | 117 min |
| Feb 28, 11:29 PM EST | Tornado Watch | SPC | 8 hr |
| Mar 1, 1:44 AM EST | Mesoscale Discussion | SPC | 61 min |
| Mar 1, 2:06 AM EST | Severe Thunderstorm Warning | IWX | 39 min |
| Mar 1, 2:29 AM EST | Severe Thunderstorm Warning | IWX | 61 min |
| Mar 1, 10:54 AM EST | Wind Advisory | IWX | 11 hr |
| Mar 7, 4:15 AM EST | Special Weather Statement | IWX | 60 min |
| Mar 7, 12:36 PM EST | High Wind Watch | IWX | 9 hr |
| Mar 7, 9:46 PM EST | High Wind Warning | IWX | 20 hr |
| Mar 12, 4:01 AM EDT | Winter Weather Advisory | IWX | 35 hr |
| Mar 16, 3:34 PM EDT | Winter Weather Advisory | IWX | 24 hr |
| Mar 17, 11:45 PM EDT | Dense Fog Advisory | IWX | 6 hr |
| Mar 21, 1:13 AM EDT | Dense Fog Advisory | IWX | 9 hr |
| Mar 30, 6:02 PM EDT | Special Weather Statement | IWX | 58 min |
| Mar 31, 6:38 AM EDT | River Flood Warning | IWX | 13 days |
| Apr 5, 3:25 PM EDT | Wind Advisory | IWX | 30 hr |
| Apr 10, 4:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 10, 9:30 PM EDT | Special Weather Statement | IWX | 30 min |
| Apr 19, 2:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Apr 19, 8:13 PM EDT | Severe Thunderstorm Warning | IWX | 47 min |
| Apr 20, 1:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 20, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 20, 4:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Apr 20, 5:59 PM EDT | Special Weather Statement | IWX | 31 min |
| Apr 20, 7:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Apr 26, 5:58 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 26, 8:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Apr 26, 8:36 PM EDT | Special Weather Statement | IWX | 24 min |
| Apr 26, 9:26 PM EDT | Severe Thunderstorm Warning | IWX | 34 min |
| Apr 30, 12:03 AM EDT | Special Weather Statement | IWX | 27 min |
| May 3, 3:53 AM EDT | Flood Watch | IWX | 47 hr |
| May 3, 12:22 PM EDT | River Flood Warning | IWX | 6 days |
| May 6, 2:58 PM EDT | Freeze Watch | IWX | 13 hr |
| May 7, 3:40 AM EDT | Freeze Warning | IWX | 28 hr |
| May 27, 12:25 PM EDT | River Flood Warning | IWX | 4 days |
| May 28, 1:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 28, 1:56 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 28, 2:19 PM EDT | Special Weather Statement | IWX | 26 min |
| May 28, 2:29 PM EDT | Severe Thunderstorm Warning | IWX | 46 min |
| May 28, 3:17 PM EDT | Special Weather Statement | IWX | 28 min |
| May 28, 3:33 PM EDT | Severe Thunderstorm Warning | IWX | 42 min |
| May 28, 4:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 28, 5:46 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 4, 4:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 4, 4:08 PM EDT | Severe Thunderstorm Warning | IWX | 30 min |
| Jun 4, 4:52 PM EDT | Special Weather Statement | IWX | 23 min |
| Jun 13, 4:05 PM EDT | Severe Thunderstorm Warning | IWX | 40 min |
| Jun 14, 4:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 19, 2:09 PM EDT | Special Weather Statement | IWX | 51 min |
| Jun 19, 2:19 PM EDT | Severe Thunderstorm Warning | IWX | 41 min |
| Jun 19, 6:50 PM EDT | Special Weather Statement | IWX | 25 min |
| Jun 19, 7:15 PM EDT | Special Weather Statement | IWX | 30 min |
| Jun 30, 1:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 8:51 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 7, 9:46 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 9:57 AM EDT | Special Weather Statement | IWX | 33 min |
| Jul 7, 10:53 AM EDT | Flash Flood Watch | IWX | 6 hr |
| Jul 7, 11:22 AM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 10, 9:54 AM EDT | Areal Flood Advisory | IWX | 111 min |
| Jul 12, 9:33 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 12, 11:25 AM EDT | Flood Watch | IWX | 17 hr |
| Jul 13, 3:19 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 20, 1:46 AM EDT | Special Weather Statement | IWX | 44 min |
| Jul 23, 2:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 4:18 PM EDT | Special Weather Statement | IWX | 42 min |
| Aug 17, 12:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 30, 12:02 AM EDT | Dense Fog Advisory | IWX | 10 hr |
| Sep 4, 3:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Sep 4, 4:32 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 4, 6:32 PM EDT | Special Weather Statement | IWX | 43 min |
| Sep 4, 6:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Sep 14, 1:59 AM EDT | Dense Fog Advisory | IWX | 8 hr |
| Sep 20, 3:33 AM EDT | Dense Fog Advisory | IWX | 6 hr |
| Oct 7, 5:40 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 7, 8:18 PM EDT | Special Weather Statement | IWX | 27 min |
| Oct 7, 8:47 PM EDT | Special Weather Statement | IWX | 43 min |
| Oct 25, 3:43 AM EDT | Frost Advisory | IWX | 29 hr |
| Nov 5, 1:09 AM EDT | Dense Fog Advisory | IWX | 11 hr |
| Nov 5, 3:23 AM EST | Flash Flood Watch | IWX | 13 hr |
| Nov 5, 10:31 AM EST | Severe Thunderstorm Warning | IWX | 44 min |
| Nov 5, 11:05 AM EST | Severe Thunderstorm Warning | IWX | 40 min |
| Nov 5, 11:15 AM EST | Severe Thunderstorm Warning | IWX | 30 min |
| Nov 5, 11:35 AM EST | Severe Thunderstorm Warning | IWX | 40 min |
| Nov 5, 11:54 AM EST | Areal Flood Warning | IWX | 3 hr |
| Nov 5, 1:06 PM EST | Areal Flood Warning | IWX | 6 hr |
| Nov 6, 9:36 AM EST | River Flood Warning | IWX | 4 days |
| Nov 14, 2:25 AM EST | Dense Fog Advisory | IWX | 7 hr |
| Nov 18, 10:01 AM EST | River Flood Warning | IWX | 35 hr |
| Nov 20, 10:55 AM EST | River Flood Warning | IWX | 4 days |
| Dec 4, 9:14 PM EST | Wind Advisory | IWX | 28 hr |
| Dec 13, 4:11 PM EST | Special Weather Statement | IWX | 79 min |
| Dec 23, 3:11 PM EST | Winter Weather Advisory | IWX | 31 hr |
| Dec 26, 3:50 AM EST | Wind Chill Advisory | IWX | 31 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 | 15 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 25 |
| Flooding | |
| Areal Flood Warning | 2 |
| River Flood Warning | 9 |
| Flash Flood Watch | 2 |
| Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Weather Advisory | 5 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
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.