Alert archive / Indiana / Flash Flood Warnings
Flash Flood Warnings in Indiana, 2022
40 flash flood warnings in 2022. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Flash Flood Warnings
- 40
- Busiest month
- July13 flash flood warnings
- Busiest day
- September 3, 20226 flash flood warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
23 of 40 flash flood warnings covering Indiana in 2022 had a flash flood report inside them; 42 of 52 flash flood reports fell inside a warning, on average 74 minutes after it went out.
Indiana, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 40 | 23 | 43% | 52 | 81% | 74 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Louisville, KY: flash flood warnings | 41 | 22 | 46% | 37 | 89% | 70 min |
| NWS Paducah, KY: flash flood warnings | 44 | 20 | 55% | 39 | 85% | 80 min |
| NWS Wilmington, OH: flash flood warnings | 25 | 13 | 48% | 35 | 77% | 84 min |
| NWS Chicago, IL: flash flood warnings | 19 | 8 | 58% | 33 | 79% | 95 min |
| NWS Indianapolis, IN: flash flood warnings | 12 | 9 | 25% | 16 | 94% | 73 min |
| NWS Northern Indiana: flash flood warnings | 9 | 3 | 67% | 14 | 71% | 109 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 | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 7:08 AM EST | Flash Flood Warning | IWX | Carroll, White | 61 min |
| Mar 6, 9:37 PM EST | Flash Flood Warning | PAH | Vanderburgh | 51 min |
| May 14, 6:17 PM EDT | Flash Flood Warning | ILN | Fayette, Franklin, Union | 2 hr |
| May 26, 8:29 PM EDT | Flash Flood Warning | LMK | Dubois | 58 min |
| Jun 6, 7:55 PM EDT | Flash Flood Warning | IWX | Cass, White | 3 hr |
| Jun 13, 3:51 PM EDT | Flash Flood Warning | IND | Clinton | 5 hr |
| Jun 13, 4:08 PM EDT | Flash Flood Warning | IND | Hancock | 3 hr |
| Jun 13, 5:20 PM EDT | Flash Flood Warning | ILN | Fayette, Franklin, Union, Wayne | 3 hr |
| Jul 5, 8:23 PM EDT | Flash Flood Warning | IWX | Allen, DeKalb, Huntington, Noble, Wells, Whitley | 6 hr |
| Jul 6, 12:09 AM EDT | Flash Flood Warning | IWX | LaGrange | 6 hr |
| Jul 6, 12:51 AM EDT | Flash Flood Warning | IWX | DeKalb, LaGrange, Steuben | 6 hr |
| Jul 8, 9:54 AM EDT | Flash Flood Warning | IND | Greene, Knox, Sullivan, Vigo | 2 hr |
| Jul 17, 4:10 PM EDT | Flash Flood Warning | IND | Delaware, Henry, Madison | 3 hr |
| Jul 17, 5:21 PM EDT | Flash Flood Warning | IND | Madison | 3 hr |
| Jul 17, 5:49 PM EDT | Flash Flood Warning | IND | Delaware, Hamilton, Henry, Madison, Tipton | 3 hr |
| Jul 23, 10:12 AM EDT | Flash Flood Warning | LOT | Benton | 3 hr |
| Jul 23, 11:02 AM EDT | Flash Flood Warning | IWX | White | 4 hr |
| Jul 23, 1:23 PM EDT | Flash Flood Warning | LOT | Benton, Jasper, Newton | 6 hr |
| Jul 24, 9:00 PM EDT | Flash Flood Warning | IND | Daviess, Greene, Knox, Sullivan | 6 hr |
| Jul 25, 1:35 AM EDT | Flash Flood Warning | LMK | Dubois | 3 hr |
| Jul 27, 8:22 AM EDT | Flash Flood Warning | IND | Bartholomew, Decatur, Shelby | 3 hr |
| Aug 2, 8:25 AM EDT | Flash Flood Warning | PAH | Gibson, Posey | 3 hr |
| Aug 4, 4:08 PM EDT | Flash Flood Warning | PAH | Spencer | 3 hr |
| Aug 6, 5:09 AM EDT | Flash Flood Warning | ILN | Ohio, Switzerland | 5 hr |
| Aug 6, 6:01 PM EDT | Flash Flood Warning | LMK | Floyd, Harrison | 60 min |
| Aug 20, 6:09 PM EDT | Flash Flood Warning | ILN | Switzerland | 2 hr |
| Aug 29, 4:47 PM EDT | Flash Flood Warning | ILN | Switzerland | 3 hr |
| Aug 29, 5:11 PM EDT | Flash Flood Warning | PAH | Spencer, Warrick | 3 hr |
| Aug 29, 10:06 PM EDT | Flash Flood Warning | IND | Clay, Parke, Vigo | 6 hr |
| Aug 30, 12:09 AM EDT | Flash Flood Warning | IND | Boone, Hamilton, Hancock, Marion | 3 hr |
| Aug 30, 12:42 AM EDT | Flash Flood Warning | IND | Clay, Putnam | 3 hr |
| Sep 3, 4:00 PM EDT | Flash Flood Warning | PAH | Pike | 110 min |
| Sep 3, 5:05 PM EDT | Flash Flood Warning | ILN | Ohio, Switzerland | 7 hr |
| Sep 3, 5:17 PM EDT | Flash Flood Warning | PAH | Gibson, Vanderburgh, Warrick | 3 hr |
| Sep 3, 5:45 PM EDT | Flash Flood Warning | ILN | Switzerland | 3 hr |
| Sep 3, 5:45 PM EDT | Flash Flood Warning | LMK | Jefferson | 3 hr |
| Sep 3, 5:50 PM EDT | Flash Flood Warning | LMK | Crawford, Dubois, Orange, Perry | 3 hr |
| Sep 5, 12:04 PM EDT | Flash Flood Warning | LMK | Dubois | 3 hr |
| Sep 5, 3:07 PM EDT | Flash Flood Warning | PAH | Gibson, Vanderburgh, Warrick | 2 hr |
| Sep 10, 9:06 PM EDT | Flash Flood Warning | IND | Hamilton | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Switzerland County5
- Dubois County4
- White County3
- Vanderburgh County3
- Madison County3
- Hamilton County3
- Gibson County3
- Warrick County3
- Fayette County2
- Franklin County2
- Union County2
- Hancock County2
- DeKalb County2
- LaGrange County2
- Greene County2
- Knox County2
- Sullivan County2
- Vigo County2
- Delaware County2
- Henry County2
- Benton County2
- Spencer County2
- Ohio County2
- Clay County2
- Carroll County1
- Cass County1
- Clinton County1
- Wayne County1
- Allen County1
- Huntington County1
- Noble County1
- Wells County1
- Whitley County1
- Steuben County1
- Tipton County1
- Jasper County1
- Newton County1
- Daviess County1
- Bartholomew County1
- Decatur County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20212023
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.