Thunderstorms quickly formed across the Lower Wabash Valley and northwest Kentucky in the vicinity of an eastward moving upper level disturbance. The boundary layer air mass in this region was characterized by temperatures in the lower 80's and dew points in the lower 70's. The combination of a moist low level environment, slightly backed wind flow along a northwest to southeast oriented warm front, and at least 40 knots of deep westerly shear promoted semi-discrete supercells with large hail, damaging winds, and isolated tornadoes.

Hail in DAVIESS, KENTUCKY
From 11-JUN-09 16:05:00 to 11-JUN-09 16:05:00 (CST-6)
Location: STANLEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Funnel Cloud in WEBSTER, KENTUCKY
From 11-JUN-09 16:01:00 to 11-JUN-09 16:01:00 (CST-6)
Location: CLAY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in DAVIESS, KENTUCKY
From 11-JUN-09 16:30:00 to 11-JUN-09 17:30:00 (CST-6)
Location: OWENSBORO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Torrential rain resulted in widespread street flooding.

Tornado in DAVIESS, KENTUCKY
From 11-JUN-09 16:36:00 to 11-JUN-09 16:37:00 (CST-6)
Location: THURSTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

There were multiple reports of a brief tornado touchdown near the intersection of Highways 405 and 1831. Some tree limbs were down.

Hail in DAVIESS, KENTUCKY
From 11-JUN-09 15:21:00 to 11-JUN-09 15:21:00 (CST-6)
Location: (OWB)OWENSBORO ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail was reported east of the Owensboro-Daviess County airport.

Thunderstorm Wind in WEBSTER, KENTUCKY
From 11-JUN-09 16:01:00 to 11-JUN-09 16:01:00 (CST-6)
Location: CLAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter estimated winds gusted to 60 mph.

Hail in DAVIESS, KENTUCKY
From 11-JUN-09 16:25:00 to 11-JUN-09 16:37:00 (CST-6)
Location: OWENSBORO
Magnitude: 2.75 
Crop damage: 0.00K
Reported by: Trained Spotter

A swath of very large hail crossed the city of Owensboro. Hail was reported up to quarter size on the west side of the city, up to golf ball size downtown, and baseball size on the east side.

Thunderstorm Wind in DAVIESS, KENTUCKY
From 11-JUN-09 16:34:00 to 11-JUN-09 16:34:00 (CST-6)
Location: OWENSBORO
Magnitude: 77.00 MG
Crop damage: 0.00K
Reported by: Trained Spotter

The 89 mph wind gust was measured on the east side of the city.

Tornado in HENDERSON, KENTUCKY
From 11-JUN-09 16:02:00 to 11-JUN-09 16:04:00 (CST-6)
Location: CARLINBURG
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

One tree and dozens of tree limbs were blown down in a tree row in the center of a very large field. The damage was in agricultural bottomland of the Ohio River. Peak winds in this portion of the track were near 65 mph. The tornado continued into Daviess County.

Tornado in DAVIESS, KENTUCKY
From 11-JUN-09 16:04:00 to 11-JUN-09 16:08:00 (CST-6)
Location: NEWMAN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 10.00K
Reported by: NWS Storm Survey

This weak tornado continued from Henderson County into northwest Daviess County. The tornado remained over agricultural river bottomland. Only some crops were damaged. One-foot high corn was blown down and whipped around by winds estimated around 75 mph. The tornado continued across the Ohio River into Spencer County, Indiana.