Alert archive / Indiana / DeKalb County
Weather alerts in DeKalb County, Indiana, 2020
97 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 97
- Warnings
- 20
- Watches
- 12
- Advisories
- 34
- Busiest month
- May13 alerts
- Busiest day
- June 10, 20206 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, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 11 | 21% | 2 | 50% | 22 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Northern Indiana: tornado warnings | 4 | 1 | 75% | 3 | 33% | 18 min |
| NWS Northern Indiana: severe thunderstorm warnings | 110 | 71 | 35% | 336 | 72% | 24 min |
| NWS Northern Indiana: flash flood warnings | 2 | 0 | 100% | 2 | 0% |
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 8, 3:27 PM EST | Flood Watch | IWX | 72 hr |
| Jan 9, 1:54 PM EST | River Flood Warning | IWX | 9 days |
| Jan 11, 11:17 AM EST | Areal Flood Advisory | IWX | 4 hr |
| Jan 16, 2:54 PM EST | Winter Weather Advisory | IWX | 44 hr |
| Jan 18, 3:13 PM EST | Wind Advisory | IWX | 7 hr |
| Feb 5, 3:14 AM EST | Winter Weather Advisory | IWX | 31 hr |
| Feb 5, 6:07 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 7, 5:50 PM EST | Special Weather Statement | IWX | 85 min |
| Feb 8, 6:13 PM EST | Special Weather Statement | IWX | 92 min |
| Feb 9, 3:14 AM EST | Winter Weather Advisory | IWX | 16 hr |
| Feb 11, 3:32 PM EST | Winter Weather Advisory | IWX | 63 hr |
| Feb 24, 2:45 PM EST | Winter Storm Watch | IWX | 25 hr |
| Feb 25, 3:37 PM EST | Winter Weather Advisory | IWX | 33 hr |
| Mar 14, 9:31 PM EDT | Special Weather Statement | IWX | 59 min |
| Mar 25, 8:41 AM EDT | Dense Fog Advisory | IWX | 2 hr |
| Mar 27, 4:29 AM EDT | Dense Fog Advisory | IWX | 7 hr |
| Mar 27, 1:53 PM EDT | Flash Flood Watch | IWX | 21 hr |
| Mar 27, 9:38 PM EDT | River Flood Warning | IWX | 21 days |
| Mar 28, 3:27 PM EDT | Wind Advisory | IWX | 29 hr |
| Apr 7, 12:03 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 7, 6:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 7, 9:07 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 7, 10:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 7, 10:45 PM EDT | Severe Thunderstorm Warning | IWX | 45 min |
| Apr 7, 11:33 PM EDT | Special Weather Statement | IWX | 42 min |
| Apr 9, 4:04 AM EDT | Wind Advisory | IWX | 16 hr |
| Apr 11, 3:03 PM EDT | High Wind Watch | IWX | 24 hr |
| Apr 12, 3:16 PM EDT | Wind Advisory | IWX | 27 hr |
| Apr 16, 4:12 AM EDT | Winter Weather Advisory | IWX | 34 hr |
| Apr 20, 11:45 PM EDT | Special Weather Statement | IWX | 60 min |
| May 7, 3:31 AM EDT | Freeze Watch | IWX | 12 hr |
| May 7, 3:39 PM EDT | Freeze Warning | IWX | 42 hr |
| May 10, 12:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 1:39 PM EDT | Special Weather Statement | IWX | 66 min |
| May 10, 2:08 PM EDT | Severe Thunderstorm Warning | IWX | 37 min |
| May 10, 2:41 PM EDT | Severe Thunderstorm Warning | IWX | 49 min |
| May 11, 3:53 AM EDT | Frost Advisory | IWX | 28 hr |
| May 12, 2:46 PM EDT | Frost Advisory | IWX | 18 hr |
| May 14, 2:27 PM EDT | Special Weather Statement | IWX | 33 min |
| May 16, 2:42 AM EDT | Dense Fog Advisory | IWX | 5 hr |
| May 16, 2:58 PM EDT | Flood Watch | IWX | 53 hr |
| May 17, 11:30 AM EDT | River Flood Warning | IWX | 21 days |
| May 18, 8:57 AM EDT | Areal Flood Advisory | IWX | 6 hr |
| Jun 10, 11:22 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 10, 11:54 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 10, 2:13 PM EDT | Severe Thunderstorm Warning | IWX | 32 min |
| Jun 10, 2:40 PM EDT | Severe Thunderstorm Warning | IWX | 50 min |
| Jun 10, 3:16 PM EDT | Severe Thunderstorm Warning | IWX | 44 min |
| Jun 10, 3:58 PM EDT | Severe Thunderstorm Warning | IWX | 32 min |
| Jun 26, 7:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 26, 7:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 10:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 26, 10:54 PM EDT | Severe Thunderstorm Warning | IWX | 51 min |
| Jun 26, 11:07 PM EDT | Severe Thunderstorm Warning | IWX | 53 min |
| Jun 26, 11:22 PM EDT | Severe Thunderstorm Warning | IWX | 38 min |
| Jul 8, 4:55 PM EDT | Heat Advisory | IWX | 28 hr |
| Jul 12, 1:18 PM EDT | Special Weather Statement | IWX | 27 min |
| Jul 17, 3:25 PM EDT | Heat Advisory | IWX | 30 hr |
| Jul 18, 3:16 PM EDT | Heat Advisory | IWX | 23 hr |
| Jul 19, 11:32 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 19, 11:51 AM EDT | Special Weather Statement | IWX | 39 min |
| Jul 19, 1:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 19, 2:43 PM EDT | Severe Thunderstorm Warning | IWX | 47 min |
| Jul 19, 3:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 1:14 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Aug 10, 3:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Aug 10, 4:26 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 10, 6:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 10, 7:18 PM EDT | Severe Thunderstorm Warning | IWX | 42 min |
| Aug 14, 6:02 PM EDT | Severe Thunderstorm Warning | IWX | 18 min |
| Aug 15, 9:19 PM EDT | Special Weather Statement | IWX | 26 min |
| Aug 15, 9:47 PM EDT | Special Weather Statement | IWX | 28 min |
| Aug 27, 3:57 PM EDT | Special Weather Statement | IWX | 33 min |
| Aug 28, 1:00 PM EDT | Special Weather Statement | IWX | 45 min |
| Aug 28, 1:21 PM EDT | Severe Thunderstorm Warning | IWX | 24 min |
| Aug 28, 1:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 29, 2:57 AM EDT | Areal Flood Advisory | IWX | 3 hr |
| Sep 10, 2:40 AM EDT | Dense Fog Advisory | IWX | 5 hr |
| Sep 18, 3:06 AM EDT | Frost Advisory | IWX | 30 hr |
| Sep 30, 3:49 PM EDT | Special Weather Statement | IWX | 56 min |
| Sep 30, 4:43 PM EDT | Special Weather Statement | IWX | 62 min |
| Oct 2, 11:37 AM EDT | Frost Advisory | IWX | 20 hr |
| Oct 4, 4:17 AM EDT | Frost Advisory | IWX | 28 hr |
| Oct 5, 4:48 AM EDT | Dense Fog Advisory | IWX | 4 hr |
| Oct 15, 3:57 AM EDT | Freeze Warning | IWX | 28 hr |
| Oct 16, 3:44 AM EDT | Fire Weather Watch | IWX | 24 hr |
| Oct 16, 3:47 AM EDT | Frost Advisory | IWX | 28 hr |
| Oct 17, 3:57 AM EDT | Red Flag Warning | IWX | 16 hr |
| Oct 22, 4:19 AM EDT | Dense Fog Advisory | IWX | 9 hr |
| Oct 23, 1:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 31, 3:52 AM EDT | Wind Advisory | IWX | 38 hr |
| Nov 10, 11:42 AM EST | Wind Advisory | IWX | 13 hr |
| Nov 14, 3:17 AM EST | Wind Advisory | IWX | 40 hr |
| Nov 15, 9:18 AM EST | Special Weather Statement | IWX | 57 min |
| Nov 18, 3:10 PM EST | Wind Advisory | IWX | 26 hr |
| Dec 10, 1:25 AM EST | Freezing Fog Advisory | IWX | 9 hr |
| Dec 29, 3:42 AM EST | Winter Weather Advisory | IWX | 29 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 | 14 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 16 |
| Flooding | |
| River Flood Warning | 3 |
| Flash Flood Watch | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 6 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.