Alert archive / Ohio / Flash Flood Warnings in 2026
Flash Flood Warning 78, NWS Wilmington, OH
NWS Wilmington, OH issued this flash flood warning at Aug 20, 2026, 1:24 AM EDT for Greene County, Montgomery County, Ohio. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2026, 1:24 AM EDT (05:24 UTC)
- Expired
- Aug 20, 2026, 3:54 AM EDT
- In force
- 3 hr
- Issued by
- NWS Wilmington, OH
- Area
- Storm-based polygon
- Flood severity
- None
Counties Greene County, OH, Montgomery County, OH
The radar
The Cincinnati radar (KILN), 41 km from the middle of the area, began a volume at 05:27 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 00:00Z, 5.4 hours before the alert went out and 41 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 192 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 864 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Wilmington, OH wrote its last area forecast discussion before this flash flood warning went out at Aug 19, 7:56 PM EDT, 5 hours 28 minutes earlier.
Area forecast discussion, Aug 19, 7:56 PM EDT, 5 hours 28 minutes before
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</html>Hazardous weather outlook, Aug 19, 3:17 PM EDT, 10 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Wilmington OH 317 PM EDT Wed Aug 19 2026 INZ050-058-059-OHZ026-034-035-042>046-051>056-060>065-074-201930- Wayne-Fayette-Union-Hardin-Mercer-Auglaize-Darke-Shelby-Logan- Delaware-Miami-Champaign-Clark-Madison-Franklin-Licking-Preble- Montgomery-Greene-Pickaway-Fairfield-Hocking- 317 PM EDT Wed Aug 19 2026 ...FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING... This Hazardous Weather Outlook is for east central Indiana, central Ohio and west central Ohio. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. Some storms this evening and tonight may produce strong wind gusts. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ066-073>075-080-KYZ089>100-OHZ070>073-077>082-088-201930- Franklin-Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone- Kenton-Campbell-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis- Butler-Warren-Clinton-Ross-Hamilton-Clermont-Brown-Highland-Adams- Pike-Scioto- 317 PM EDT Wed Aug 19 2026 This Hazardous Weather Outlook is for southeast Indiana, northeast Kentucky, northern Kentucky, south central Ohio and southwest Ohio. .DAY ONE...This afternoon and tonight. Showers and thunderstorms tonight may produce locally heavy rain that could lead to isolated flooding. Some storms this evening and tonight may also produce strong wind gusts. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Local storm report, Aug 19, 7:45 PM EDT, 5 hours 39 minutes before
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</html>Local storm report, Aug 19, 8:21 PM EDT, 5 hours 3 minutes before
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</html>Local storm report, Aug 19, 8:37 PM EDT, 4 hours 47 minutes before
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</html>Special weather statement, Aug 19, 8:42 PM EDT, 4 hours 42 minutes before
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</html>Special weather statement, Aug 19, 9:10 PM EDT, 4 hours 14 minutes before
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</html>The office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 8:22 PM EDT | River Flood Warning | ILN | Shelby | 18 hr |
| Aug 19, 8:49 PM EDT | Areal Flood Warning | ILN | Auglaize, Logan, Shelby | 18 hr |
| Aug 19, 10:38 PM EDT | River Flood Advisory | ILN | Delaware, Franklin | 11 hr |
| Aug 19, 11:05 PM EDT | Areal Flood Advisory | ILN | Preble | 3 hr |
| Aug 19, 11:50 PM EDT | Flash Flood Warning | ILN | Preble | 4 hr |
| Aug 20, 12:16 AM EDT | Areal Flood Advisory | ILN | Greene, Montgomery | 69 min |
| Aug 20, 1:14 AM EDT | Areal Flood Advisory | ILN | Butler, Warren | 5 hr |
| Aug 20, 1:50 AM EDT | Areal Flood Advisory | ILN | Clark, Fayette, Greene, Madison | 2 hr |
| Aug 20, 2:29 AM EDT | Areal Flood Advisory | ILN | Delaware, Fairfield, Fayette, Franklin, Licking, Madison and 1 more | 113 min |
| Aug 20, 3:49 AM EDT | Flash Flood Warning | ILN | Fairfield, Franklin, Licking | 4 hr |
| Aug 20, 3:54 AM EDT | Areal Flood Warning | ILN | Greene, Montgomery | 14 hr |
| Aug 20, 4:11 AM EDT | Areal Flood Warning | ILN | Clark, Fayette, Greene, Madison | 9 hr |
| Aug 20, 4:13 AM EDT | Areal Flood Warning | ILN | Preble | 10 hr |
| Aug 20, 4:22 AM EDT | Areal Flood Warning | ILN | Delaware, Fairfield, Fayette, Franklin, Madison, Pickaway | 14 hr |
| Aug 20, 4:24 AM EDT | Special Weather Statement | ILN | Hamilton | 36 min |
| Aug 20, 4:37 AM EDT | River Flood Warning | ILN | Greene, Warren | 19 hr |
| Aug 20, 5:27 AM EDT | River Flood Warning | ILN | Licking | 14 hr |
| Aug 20, 5:32 AM EDT | Flash Flood Warning | ILN | Auglaize, Hardin, Logan, Shelby, Union | 4 hr |
| Aug 20, 5:47 AM EDT | Flash Flood Warning | ILN | Fairfield, Pickaway | 3 hr |
| Aug 20, 5:54 AM EDT | River Flood Warning | ILN | Butler | 6 hr |
| Aug 20, 6:06 AM EDT | River Flood Warning | ILN | Licking | 54 hr |
| Aug 20, 6:09 AM EDT | Areal Flood Advisory | ILN | Licking | 3 hr |
| Aug 20, 6:19 AM EDT | Areal Flood Warning | ILN | Butler, Greene, Montgomery, Preble, Warren | 4 hr |
| Aug 20, 6:51 AM EDT | River Flood Warning | ILN | Fairfield, Licking | 57 hr |
| Aug 20, 7:14 AM EDT | River Flood Warning | ILN | Franklin | 4 hr |
| Aug 20, 7:29 AM EDT | Areal Flood Warning | ILN | Delaware, Fairfield, Franklin, Licking | 11 hr |
| Aug 20, 7:46 AM EDT | River Flood Warning | ILN | Licking | 8 hr |
| Aug 20, 8:25 AM EDT | Areal Flood Warning | ILN | Fairfield, Licking, Pickaway | 11 hr |
| Aug 20, 9:04 AM EDT | Areal Flood Warning | ILN | Fairfield, Licking | 11 hr |
| Aug 20, 9:12 AM EDT | Areal Flood Warning | ILN | Auglaize, Hardin, Logan | 6 hr |
| Aug 20, 9:27 AM EDT | River Flood Warning | ILN | Pickaway | 61 hr |
| Aug 20, 9:59 AM EDT | River Flood Warning | ILN | Hocking | 14 hr |
| Aug 20, 10:45 AM EDT | River Flood Warning | ILN | Licking | 13 hr |
| Aug 20, 11:15 AM EDT | River Flood Warning | ILN | Hamilton | 9 hr |
| Aug 20, 6:12 PM EDT | Areal Flood Warning | ILN | Fairfield, Licking | 43 hr |
| Aug 19, 8:42 PM EDT | Special Weather Statement | ILN | Wayne | 33 min |
| Aug 19, 9:10 PM EDT | Areal Flood Advisory | ILN | Fayette, Union, Wayne | 4 hr |
| Aug 19, 9:10 PM EDT | Special Weather Statement | ILN | Wayne | 35 min |
| Aug 20, 3:41 AM EDT | Special Weather Statement | ILN | Dearborn, Ripley | 49 min |
Nearby
Flash Flood Warnings in Ohio, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.