Alert archive / Indiana / Allen County
Weather alerts in Allen County, Indiana, 2021
109 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Allen County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 109
- Warnings
- 25
- Watches
- 13
- Advisories
- 34
- Busiest month
- August19 alerts
- Busiest day
- August 11, 20219 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Allen County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 6 | 25% | 22 | 50% | 18 min |
| Flash flood warnings | 1 | 1 | 0% | 9 | 89% | 91 min |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Northern Indiana: tornado warnings | 14 | 1 | 93% | 9 | 11% | 3 min |
| NWS Northern Indiana: severe thunderstorm warnings | 128 | 77 | 40% | 377 | 58% | 19 min |
| NWS Northern Indiana: flash flood warnings | 6 | 3 | 50% | 25 | 84% | 59 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 20, 12:52 AM EST | Special Weather Statement | IWX | 83 min |
| Jan 24, 3:49 PM EST | Winter Weather Advisory | IWX | 45 hr |
| Jan 29, 4:07 AM EST | Winter Storm Watch | IWX | 23 hr |
| Jan 30, 3:29 AM EST | Winter Storm Warning | IWX | 35 hr |
| Jan 30, 10:39 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 3:24 PM EST | Wind Chill Advisory | IWX | 22 hr |
| Feb 13, 3:10 PM EST | Winter Weather Advisory | IWX | 25 hr |
| Feb 14, 3:41 PM EST | Winter Storm Warning | IWX | 42 hr |
| Feb 15, 3:52 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 19, 1:46 AM EST | Freezing Fog Advisory | IWX | 4 hr |
| Feb 28, 3:02 PM EST | River Flood Warning | IWX | 31 hr |
| Mar 17, 3:46 PM EDT | Wind Advisory | IWX | 29 hr |
| Mar 24, 3:47 AM EDT | High Wind Watch | IWX | 24 hr |
| Mar 25, 4:02 AM EDT | Wind Advisory | IWX | 24 hr |
| Mar 26, 5:17 AM EDT | River Flood Warning | IWX | 5 hr |
| Mar 27, 9:00 PM EDT | Special Weather Statement | IWX | 30 min |
| Apr 10, 9:12 PM EDT | Special Weather Statement | IWX | 48 min |
| Apr 17, 3:52 PM EDT | Frost Advisory | IWX | 17 hr |
| Apr 19, 4:24 AM EDT | Freeze Watch | IWX | 11 hr |
| Apr 19, 3:40 PM EDT | Freeze Warning | IWX | 64 hr |
| Apr 20, 3:49 AM EDT | Winter Weather Advisory | IWX | 23 hr |
| Apr 22, 3:12 PM EDT | Frost Advisory | IWX | 18 hr |
| Apr 24, 11:31 PM EDT | Dense Fog Advisory | IWX | 6 hr |
| May 7, 2:37 PM EDT | Frost Advisory | IWX | 18 hr |
| May 9, 9:57 AM EDT | River Flood Warning | IWX | 5 days |
| May 9, 9:57 AM EDT | River Flood Warning | IWX | 65 hr |
| May 9, 9:57 AM EDT | River Flood Warning | IWX | 69 hr |
| May 9, 9:57 AM EDT | River Flood Warning | IWX | 11 hr |
| May 9, 2:28 PM EDT | River Flood Warning | IWX | 8 hr |
| May 9, 2:47 PM EDT | Frost Advisory | IWX | 17 hr |
| May 10, 2:56 PM EDT | Frost Advisory | IWX | 17 hr |
| May 11, 1:09 PM EDT | Frost Advisory | IWX | 19 hr |
| May 12, 3:23 PM EDT | Frost Advisory | IWX | 16 hr |
| May 26, 5:28 PM EDT | Special Weather Statement | IWX | 32 min |
| Jun 12, 6:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 18, 8:22 AM EDT | Special Weather Statement | IWX | 53 min |
| Jun 19, 8:14 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 19, 8:50 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 20, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 20, 7:49 PM EDT | Severe Thunderstorm Warning | IWX | 10 min |
| Jun 20, 8:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 20, 11:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 21, 1:00 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 21, 2:14 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 3:25 AM EDT | Special Weather Statement | IWX | 35 min |
| Jun 26, 7:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 26, 9:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 29, 12:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 1:43 PM EDT | Areal Flood Warning | IWX | 3 hr |
| Jul 7, 12:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 7, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 3:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 7, 5:54 PM EDT | Severe Thunderstorm Warning | IWX | 51 min |
| Jul 12, 9:10 PM EDT | Special Weather Statement | IWX | 35 min |
| Jul 12, 9:46 PM EDT | Special Weather Statement | IWX | 29 min |
| Jul 12, 10:30 PM EDT | Areal Flood Advisory | IWX | 3 hr |
| Jul 16, 9:17 PM EDT | Areal Flood Advisory | IWX | 3 hr |
| Jul 16, 11:27 PM EDT | Flash Flood Warning | IWX | 4 hr |
| Jul 24, 8:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 29, 2:00 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 29, 5:25 AM EDT | Severe Thunderstorm Warning | IWX | 50 min |
| Jul 29, 5:33 AM EDT | Special Weather Statement | IWX | 42 min |
| Jul 29, 5:55 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 29, 6:07 AM EDT | Severe Thunderstorm Warning | IWX | 38 min |
| Aug 7, 11:58 AM EDT | Special Weather Statement | IWX | 32 min |
| Aug 7, 12:08 PM EDT | Severe Thunderstorm Warning | IWX | 37 min |
| Aug 9, 3:29 PM EDT | Heat Advisory | IWX | 29 hr |
| Aug 10, 3:27 PM EDT | Heat Advisory | IWX | 29 hr |
| Aug 10, 10:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 11, 12:38 AM EDT | Special Weather Statement | IWX | 22 min |
| Aug 11, 12:56 AM EDT | Special Weather Statement | IWX | 49 min |
| Aug 11, 10:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 11, 11:50 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 11, 1:17 PM EDT | Severe Thunderstorm Warning | IWX | 43 min |
| Aug 11, 1:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 11, 1:48 PM EDT | Severe Thunderstorm Warning | IWX | 27 min |
| Aug 11, 2:14 PM EDT | Severe Thunderstorm Warning | IWX | 46 min |
| Aug 12, 3:17 AM EDT | Heat Advisory | IWX | 17 hr |
| Aug 12, 7:15 AM EDT | Special Weather Statement | IWX | 30 min |
| Aug 18, 5:45 AM EDT | Dense Fog Advisory | IWX | 3 hr |
| Aug 24, 3:30 AM EDT | Heat Advisory | IWX | 18 hr |
| Aug 24, 3:53 PM EDT | Heat Advisory | IWX | 29 hr |
| Aug 25, 9:28 PM EDT | Heat Advisory | IWX | 12 hr |
| Sep 14, 2:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 14, 3:08 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 14, 6:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Sep 14, 7:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 21, 4:29 AM EDT | Flood Watch | IWX | 47 hr |
| Oct 3, 5:44 PM EDT | Special Weather Statement | IWX | 31 min |
| Oct 9, 1:03 AM EDT | Dense Fog Advisory | IWX | 8 hr |
| Oct 14, 4:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Oct 23, 2:29 PM EDT | Flood Watch | IWX | 37 hr |
| Oct 24, 10:35 PM EDT | Special Weather Statement | IWX | 40 min |
| Oct 25, 6:12 AM EDT | River Flood Warning | IWX | 44 hr |
| Oct 25, 10:31 AM EDT | River Flood Warning | IWX | 21 days |
| Oct 25, 10:31 AM EDT | River Flood Warning | IWX | 25 hr |
| Oct 25, 10:12 PM EDT | River Flood Warning | IWX | 53 hr |
| Oct 25, 10:20 PM EDT | River Flood Warning | IWX | 60 hr |
| Oct 26, 3:08 PM EDT | Frost Advisory | IWX | 19 hr |
| Nov 9, 11:36 PM EST | Dense Fog Advisory | IWX | 9 hr |
| Nov 27, 10:46 AM EST | Winter Weather Advisory | IWX | 11 hr |
| Dec 4, 12:59 AM EST | Dense Fog Advisory | IWX | 10 hr |
| Dec 9, 8:54 PM EST | Dense Fog Advisory | IWX | 15 hr |
| Dec 10, 12:03 PM EST | Wind Advisory | IWX | 29 hr |
| Dec 11, 12:20 AM EST | Tornado Watch | SPC | 6 hr |
| Dec 11, 1:15 AM EST | Special Weather Statement | IWX | 30 min |
| Dec 15, 3:37 AM EST | Wind Advisory | IWX | 36 hr |
| Dec 27, 11:13 AM EST | Dense Fog Advisory | IWX | 8 hr |
| Dec 30, 5:38 PM EST | Dense Fog Advisory | IWX | 6 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 archive20202022
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.