Non-severe early morning convection over the Ohio River produced a deep outflow boundary across northern Kentucky, southeast Indiana, and southern Ohio. This boundary triggered the development of severe thunderstorms during the late morning through the afternoon in that area. By the mid afternoon, an approaching mesoscale convective vortex produced severe storms north of the Ohio River. Cold pools from these storms produced additional severe storms into the early evening across much of the area. The primary threat was large hail and damaging winds.

Hail in HAMILTON, OHIO
From 10-JUN-11 16:03:00 to 10-JUN-11 16:07:00 (EST-5)
Location: DELHI
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in WARREN, OHIO
From 10-JUN-11 16:50:00 to 10-JUN-11 17:00:00 (EST-5)
Location: WAYNESVILLE
Magnitude: 1.00 
Reported by: Public

Hail in MONTGOMERY, OHIO
From 10-JUN-11 17:24:00 to 10-JUN-11 17:28:00 (EST-5)
Location: TROTWOOD
Magnitude: 1.00 
Reported by: Broadcast Media

Thunderstorm Wind in HAMILTON, OHIO
From 10-JUN-11 17:21:00 to 10-JUN-11 17:22:00 (EST-5)
Location: (LUK)LUNKEN FLD CINC
Magnitude: 55.00 MG
Reported by: ASOS

Thunderstorm Wind in HAMILTON, OHIO
From 10-JUN-11 17:24:00 to 10-JUN-11 17:25:00 (EST-5)
Location: (LUK)LUNKEN FLD CINC
Magnitude: 50.00 MG
Reported by: ASOS

Hail in CHAMPAIGN, OHIO
From 10-JUN-11 17:36:00 to 10-JUN-11 17:40:00 (EST-5)
Location: URBANA
Magnitude: 0.75 
Reported by: Public

Hail in MONTGOMERY, OHIO
From 10-JUN-11 18:27:00 to 10-JUN-11 18:40:00 (EST-5)
Location: VANDALIA
Magnitude: 0.88 
Reported by: Trained Spotter

Thunderstorm Wind in MONTGOMERY, OHIO
From 10-JUN-11 18:27:00 to 10-JUN-11 18:28:00 (EST-5)
Location: VANDALIA
Magnitude: 52.00 EG
Reported by: Trained Spotter

The spotter estimated the wind gust.

Hail in FRANKLIN, OHIO
From 10-JUN-11 18:58:00 to 10-JUN-11 19:02:00 (EST-5)
Location: LINCOLN VLG
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in FRANKLIN, OHIO
From 10-JUN-11 19:10:00 to 10-JUN-11 19:11:00 (EST-5)
Location: GROVE CITY
Magnitude: 61.00 EG
Reported by: Trained Spotter

The spotter estimated the wind gust.

Hail in FRANKLIN, OHIO
From 10-JUN-11 19:17:00 to 10-JUN-11 19:21:00 (EST-5)
Location: HILLIARD
Magnitude: 0.75 
Reported by: Amateur Radio

Thunderstorm Wind in FRANKLIN, OHIO
From 10-JUN-11 19:25:00 to 10-JUN-11 19:29:00 (EST-5)
Location: COLUMBUS
Magnitude: 50.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree was reported down on a house. Large tree limbs were also reported down in the area. These occurrences were due to damaging thunderstorm winds.

Hail in AUGLAIZE, OHIO
From 10-JUN-11 19:17:00 to 10-JUN-11 19:21:00 (EST-5)
Location: NEW BREMEN
Magnitude: 1.25 
Reported by: County Official

Thunderstorm Wind in AUGLAIZE, OHIO
From 10-JUN-11 19:23:00 to 10-JUN-11 19:24:00 (EST-5)
Location: NEW BREMEN
Magnitude: 52.00 EG
Reported by: Trained Spotter

The spotter estimated the wind gust.

Hail in AUGLAIZE, OHIO
From 10-JUN-11 19:27:00 to 10-JUN-11 19:30:00 (EST-5)
Location: NEW BREMEN
Magnitude: 0.88 
Reported by: Emergency Manager

Thunderstorm Wind in DELAWARE, OHIO
From 10-JUN-11 19:29:00 to 10-JUN-11 19:33:00 (EST-5)
Location: SUNBURY
Magnitude: 50.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous power lines were reported down and a tree fell through the roof of a house due to damaging thunderstorm winds.

Thunderstorm Wind in FRANKLIN, OHIO
From 10-JUN-11 19:37:00 to 10-JUN-11 19:38:00 (EST-5)
Location: BEXLEY
Magnitude: 64.00 MG
Reported by: Amateur Radio

Flash Flood in HAMILTON, OHIO
From 10-JUN-11 18:30:00 to 10-JUN-11 19:30:00 (EST-5)
Location: DENT
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

There were several reports of creeks out of their banks with water flowing over roadways. Parked cars were swept two-hundred feet at one location. These occurrences were due to flash flooding caused by heavy rains.

Heavy Rain in HAMILTON, OHIO
From 10-JUN-11 17:28:00 to 10-JUN-11 18:30:00 (EST-5)
Location: BRIDGETOWN
Reported by: Trained Spotter

Standing water due to heavy rain was reported on a couple of roads.

Thunderstorm Wind in HAMILTON, OHIO
From 10-JUN-11 16:40:00 to 10-JUN-11 16:50:00 (EST-5)
Location: CLEVES
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Power lines and a tree were reported down due to damaging thunderstorm winds.

Hail in WARREN, OHIO
From 10-JUN-11 17:40:00 to 10-JUN-11 17:44:00 (EST-5)
Location: OREGONIA
Magnitude: 0.75 
Reported by: NWS Employee

Hail in HAMILTON, OHIO
From 10-JUN-11 11:16:00 to 10-JUN-11 11:25:00 (EST-5)
Location: HARRISON
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in HAMILTON, OHIO
From 10-JUN-11 11:40:00 to 10-JUN-11 11:44:00 (EST-5)
Location: NORTH BEND
Magnitude: 0.75 
Reported by: Public

Hail in HAMILTON, OHIO
From 10-JUN-11 11:37:00 to 10-JUN-11 11:41:00 (EST-5)
Location: CLEVES
Magnitude: 1.00 
Reported by: Public

Hail in HAMILTON, OHIO
From 10-JUN-11 11:55:00 to 10-JUN-11 11:59:00 (EST-5)
Location: ADDYSTON
Magnitude: 0.75 
Reported by: NWS Employee

Hail in HAMILTON, OHIO
From 10-JUN-11 12:10:00 to 10-JUN-11 12:14:00 (EST-5)
Location: DELHI
Magnitude: 0.88 
Reported by: Amateur Radio

Hail in CLERMONT, OHIO
From 10-JUN-11 13:12:00 to 10-JUN-11 13:16:00 (EST-5)
Location: NEW RICHMOND
Magnitude: 1.00 
Reported by: Public