Alert archive / Ohio / Flash Flood Warnings in 2026
Flash Flood Warning 76, NWS Wilmington, OH
NWS Wilmington, OH issued this flash flood warning at Aug 19, 2026, 7:04 PM EDT for Logan County, Shelby County, Ohio. It was in force for 105 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 19, 2026, 7:04 PM EDT (23:04 UTC)
- Expired
- Aug 19, 2026, 8:49 PM EDT
- In force
- 105 min
- Issued by
- NWS Wilmington, OH
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Logan County, OH, Shelby County, OH
The radar
The Cincinnati radar (KILN), 100 km from the middle of the area, began a volume at 23:07 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 19, 7:25 PM EDT | FLASH FLOOD | 5 Sw Anna, OH | Water rushing over the intersection of State Route 705 and Hardin Wapakoneta Road. |
| Aug 19, 7:30 PM EDT | FLASH FLOOD | 3 Sw Bellefontaine, OH | Water rushing across Township Road 198 south of Township Road 200. |
| Aug 19, 8:02 PM EDT | FLASH FLOOD | 3 Ese Anna, OH | Rushing water across Meranda Road just east of Sidney Freyburg Road. |
| Aug 19, 8:33 PM EDT | FLASH FLOOD | 2 Wsw Zanesfield, OH | Water rushing across Mt Crest Drive just east of County Road 55. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this flash flood warning; the first came 21 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.1 hours before the alert went out and 99 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
- 12 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 906 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
506
WGUS51 KILN 192304
FFWILN
OHC091-149-200200-
/O.NEW.KILN.FF.W.0076.260819T2304Z-260820T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
704 PM EDT Wed Aug 19 2026
The National Weather Service in Wilmington has issued a
* Flash Flood Warning for...
Southern Logan County in west central Ohio...
Central Shelby County in west central Ohio...
* Until 1000 PM EDT.
* At 704 PM EDT, radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
3 and 5 inches of rain have fallen. Additional rainfall amounts of
1 to 2 inches are possible. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that may experience flash flooding include...
Sidney, Bellefontaine, Newport, West Liberty, Anna, Fort Loramie,
De Graff, Quincy, Port Jefferson, Valley Hi, Zanesfield, Maplewood,
Pemberton, Logansville, Mcmorran, Swanders, Pickrelltown, New
Jerusalem and Lake Loramie State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
To report flash flooding, go to our website at weather.gov/iln and
submit your report via social media, when you can do so safely.
&&
LAT...LON 4028 8401 4028 8407 4031 8418 4028 8432
4028 8442 4037 8442 4042 8405 4038 8362
4024 8363 4025 8378 4026 8378
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
McGinnis1 follow-up statement
992
WGUS71 KILN 200049
FFSILN
Flash Flood Statement
National Weather Service Wilmington OH
849 PM EDT Wed Aug 19 2026
OHC091-149-200059-
/O.CAN.KILN.FF.W.0076.000000T0000Z-260820T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Logan OH-Shelby OH-
849 PM EDT Wed Aug 19 2026
...FLASH FLOOD WARNING FOR SOUTHERN LOGAN AND CENTRAL SHELBY COUNTIES
HAS BEEN REPLACED WITH A FLOOD WARNING...
Flash flooding has ended across the area, but flooding continues.
Therefore the flash flood warning has been replaced by a flood
warning. Please refer to that bulletin for more information.
A Flood Watch remains in effect until 1000 AM EDT Thursday for
portions of east central Indiana and Ohio.
&&
LAT...LON 4028 8401 4028 8407 4031 8418 4028 8432
4028 8442 4037 8442 4042 8405 4038 8362
4024 8363 4025 8378 4026 8378
$$
McGinnisWhat 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, 3:13 PM EDT, 3 hours 51 minutes earlier. Its key messages:
- 1) Showers and thunderstorms will develop into the area later this afternoon and continue through tonight as low pressure and a cold front move across the area. Locally heavy rain is possible. 2) Additional storms are expected on Saturday with another cold front sweeping through.
Area forecast discussion, Aug 19, 3:13 PM EDT, 3 hours 51 minutes before
Area Forecast Discussion
National Weather Service Wilmington OH
313 PM EDT Wed Aug 19 2026
.WHAT HAS CHANGED...
Flood Watch issued for counties near and north of I-70 corridor for
this afternoon into Thursday morning.
&&
.KEY MESSAGES...
1) Showers and thunderstorms will develop into the area later this
afternoon and continue through tonight as low pressure and a cold
front move across the area. Locally heavy rain is possible.
2) Additional storms are expected on Saturday with another cold
front sweeping through.
&&
.DISCUSSION...
KEY MESSAGE 1)
Scattered showers moving into the western portions of our CWA during
the mid afternoon. Limited instability and poor wind shear resulting
in minimal convection, but cannot rule out stray lightning strikes
from this afternoon activity, especially as CAPE values gradually
increase from the west.
Late this evening, a cold front will begin to carve its way south,
slowly progressing through our CWA tonight through early Thursday. A
more robust shortwave trough will accompany this frontal boundary
overnight, which will increase the amount of forcing and overall
convective activity. For several runs now, CAMs have been hinting at
an east-west oriented line of showers/storms developing near the
I-70 corridor late this evening and continuing into the overnight
hours. For some locations, a 4-6 hour period of moderate to heavy
rainfall may ensue. The environment suggests PWATs around 1.6-1.8"
and warm rain processes that will be conducive to heavy rainfall.
Combined with the fact that locations near eastern IN/western OH and
central OH have saturated soils in the 95th-99th percentile range
(according to NASA SPoRT-LIS), a Flood Watch has been issued given
the flash flood risk.
Keep in mind, heavy rainfall may still be possible outside of the
Flood Watch area. While most CAMs have been more progressive with the
heavy rain in our south, portions of the Tristate (esp far southwest
OH) are also particularly vulnerable due to high soil moisture
content. Should storms be more robust and linger a bit longer in near
the Ohio River, localized hydro issues may occur.
Severe potential appears to be very limited today/tonight. It will be
difficult to develop large hail with any storms this
afternoon/evening. Wind shear doesn't increase until later this
evening, so we could see some stronger gusts overnight, but overall
this threat is expected to remain low.
KEY MESSAGE 2)
Shower/storm potential remains for Saturday afternoon and evening
based on latest model guidance. Some deterministic models have been
less robust in overall coverage of pcpn, with the best chances for
storms shifting northwards towards central/western OH and areas
north. Nonetheless, still warrants a mention given that another cold
front will sweep through the Ohio Valley and modest instability is
expected to be in place. Will delve into more details as we get
closer.
&&
.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
A round of showers with embedded thunder is possible this afternoon
and early evening. Just had a SHRA mention for this afternoon given
limited thunder activity, but will amend if coverage in thunder
increases.
Better coverage in showers and particularly thunderstorms is expected
late this evening, primarily after 00z. Timing is still a little
uncertain on when the heaviest rainfall is expected (some guidance is
beginning to trend storms even later). Nonetheless, the moral of the
story is that a west-east oriented band of pcpn is expected to
develop and provide multiple rounds of storms near the I-70 corridor
with a slow moving cold front. Additional showers/storms will begin
to fire off a few hours later near the Tristate, with pcpn becoming
more progressive early Thursday morning before pushing eastward.
MVFR CIGs (< 2000 ft) expected to develop early Thursday morning,
perhaps before the rainfall ends. A period of IFR cannot be ruled
out, but not confident enough yet to include in the TAFs. CIGs
expected to improve back to VFR by Thursday afternoon.
Other than brief gusts within thunderstorms, winds generally remain
light below 10 kts through the taf period, with a shift to the NW
Thursday morning behind the frontal passage.
OUTLOOK...Thunderstorms possible Saturday afternoon and evening.
&&
.ILN WATCHES/WARNINGS/ADVISORIES...
OH...Flood Watch through Thursday morning for OHZ026-034-035-042>046-
051>056-060>065-074.
KY...None.
IN...Flood Watch through Thursday morning for INZ050-058-059.
&&
DISCUSSION...Clark
AVIATION...ClarkHazardous weather outlook, Aug 19, 3:17 PM EDT, 3 hours 47 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
Special weather statement, Aug 19, 4:55 PM EDT, 2 hours 9 minutes before
Special Weather Statement
National Weather Service Wilmington OH
455 PM EDT Wed Aug 19 2026
OHZ043-044-052-192130-
Champaign OH-Logan OH-Shelby OH-
455 PM EDT Wed Aug 19 2026
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF SOUTHEASTERN
SHELBY...NORTHERN CHAMPAIGN AND SOUTHERN LOGAN COUNTIES THROUGH 530
PM EDT...
At 455 PM EDT, strong thunderstorms were located along a line
extending from near Sidney to near Bellefontaine, moving east at 25
mph.
HAZARD...Wind gusts up to 40 mph, pea size hail, and very heavy
rain.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Hail may cause minor damage to
vegetation. Visibility will be poor and hydroplaning is
possible.
Locations impacted include...
Sidney, Bellefontaine, West Liberty, North Lewisburg, De Graff,
Quincy, Port Jefferson, Valley Hi, Zanesfield, Logansville, Rosewood,
Pickrelltown, Middleburg, Plattsville, Maplewood, Springhills, Mingo,
Pemberton, and East Liberty.
This includes I-75 in Ohio between mile markers 95 and 99.
If outdoors, consider seeking shelter inside a sturdy building.
Motorists should slow down and use extra caution.
To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.
&&
LAT...LON 4037 8379 4037 8354 4024 8355 4023 8355
4023 8354 4020 8354 4022 8416 4039 8417
TIME...MOT...LOC 2055Z 281DEG 21KT 4032 8418 4036 8380
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
HatzosSpecial weather statement, Aug 19, 5:31 PM EDT, 1 hour 33 minutes before
Special Weather Statement
National Weather Service Wilmington OH
531 PM EDT Wed Aug 19 2026
OHZ044-045-052-192200-
Champaign OH-Logan OH-Union OH-
531 PM EDT Wed Aug 19 2026
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHEASTERN
CHAMPAIGN...SOUTHEASTERN LOGAN COUNTIES IN WEST CENTRAL OHIO AND
SOUTHERN UNION COUNTIES IN CENTRAL OHIO THROUGH 600 PM EDT...
At 531 PM EDT, a strong thunderstorm was located near North
Lewisburg, moving east at 25 mph.
HAZARD...Wind gusts up to 40 mph, pea size hail, and very heavy
rain.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Hail may cause minor damage to
vegetation. Visibility will be poor and hydroplaning is
possible.
Locations impacted include...
Marysville, North Lewisburg, Milford Center, Woodstock, Unionville
Center, Raymond, Pickrelltown, Broadway, Middleburg, Pharisburg,
Pottersburg, Mingo, New Dover, and East Liberty.
If outdoors, consider seeking shelter inside a sturdy building.
Motorists should slow down and use extra caution.
To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.
&&
LAT...LON 4020 8369 4038 8364 4035 8329 4024 8325
4012 8332
TIME...MOT...LOC 2131Z 283DEG 23KT 4028 8358
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
HatzosLocal storm report, Aug 19, 5:34 PM EDT, 1 hour 30 minutes before
Preliminary Local Storm Report
National Weather Service Wilmington OH
534 PM EDT Wed Aug 19 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0532 PM Flood Bellefontaine 40.36N 83.76W
08/19/2026 Logan OH 911 Call Center
Bellefontaine law enforcement responding to
vehicles stuck in high water.
&&
nmLocal storm report, Aug 19, 6:28 PM EDT, 36 minutes before
Preliminary Local Storm Report
National Weather Service Wilmington OH
628 PM EDT Wed Aug 19 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0534 PM Flood 6 SW Anna 40.34N 84.25W
08/19/2026 Shelby OH Public
Flooding at a property on Hardin Wapakoneta
Road north of West Mason Road. Most of the
yard is flooded and water is entering a
barn.
&&
HATZOSLocal storm report, Aug 19, 6:40 PM EDT, 24 minutes before
Preliminary Local Storm Report
National Weather Service Wilmington OH
640 PM EDT Wed Aug 19 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0608 PM Flash Flood 2 S Bellefontaine 40.33N 83.76W
08/19/2026 Logan OH Public
Allen Road covered with water and impassable
west of US Route 68. A car was stranded in
the water.
&&
HATZOSLocal storm report, Aug 19, 7:01 PM EDT, 3 minutes before
Preliminary Local Storm Report
National Weather Service Wilmington OH
701 PM EDT Wed Aug 19 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0634 PM Flash Flood Bellefontaine 40.36N 83.76W
08/19/2026 Logan OH Public
Water rushing over McKinley Street and W
Chillicothe Street in Bellefontaine.
&&
HATZOSThe office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 12:40 PM EDT | Flood Watch | ILN | Auglaize, Champaign, Clark, Darke, Delaware, Fairfield and 15 more | 21 hr |
| Aug 19, 3:47 PM EDT | Areal Flood Advisory | ILN | Logan, Union | 6 hr |
| Aug 19, 3:55 PM EDT | Areal Flood Advisory | ILN | Mercer | 5 hr |
| Aug 19, 4:25 PM EDT | Areal Flood Advisory | ILN | Auglaize, Logan, Shelby | 6 hr |
| Aug 19, 4:26 PM EDT | Special Weather Statement | ILN | Logan, Shelby | 34 min |
| Aug 19, 4:53 PM EDT | Flash Flood Warning | ILN | Logan, Shelby | 3 hr |
| Aug 19, 4:55 PM EDT | Special Weather Statement | ILN | Logan | 35 min |
| Aug 19, 5:05 PM EDT | Areal Flood Advisory | ILN | Delaware | 4 hr |
| Aug 19, 5:31 PM EDT | Special Weather Statement | ILN | Union | 29 min |
| Aug 19, 5:38 PM EDT | Flash Flood Warning | ILN | Shelby | 3 hr |
| Aug 19, 5:52 PM EDT | Areal Flood Advisory | ILN | Delaware | 3 hr |
| Aug 19, 6:18 PM EDT | Flash Flood Warning | ILN | Delaware | 66 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.