Thunderstorms developed along a northwestward arcing outflow boundary from near Nashville, TN towards Evansville, IN. The atmosphere immediately to the west of this boundary became very unstable as strong afternoon heating pushed temperatures into the lower to mid 90's. As the storms organized into a well-defined complex, they accelerated toward the south-southeast. The accelerating storm complex produced locally damaging winds.

Thunderstorm Wind in VANDERBURGH, INDIANA
From 22-JUN-09 16:10:00 to 22-JUN-09 16:30:00 (CST-6)
Location: STACER
Magnitude: 83.00 EG
Property damage: 125.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A downburst with peak winds estimated near 95 mph affected an area one mile wide and six miles long. The damage started near the Gibson County line not far from Interstate 64. Many dozens of trees and tree limbs were blown down. Several homes sustained damage, mainly to roofs. Two barns were destroyed. Other farm buildings were damaged. Metal farm bins were partially blown over. Damage near the north end of the track was noticeably divergent.

Thunderstorm Wind in POSEY, INDIANA
From 22-JUN-09 17:55:00 to 22-JUN-09 17:55:00 (CST-6)
Location: GRIFFIN
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A couple of homes were damaged by falling trees, along with a couple of pickup trucks.

Thunderstorm Wind in GIBSON, INDIANA
From 22-JUN-09 15:40:00 to 22-JUN-09 15:55:00 (CST-6)
Location: FRANCISCO
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trees were down with minor structural damage in Francisco and along Indiana 65 a few miles west of Wheeling.

Thunderstorm Wind in WARRICK, INDIANA
From 22-JUN-09 16:40:00 to 22-JUN-09 16:52:00 (CST-6)
Location: NEWBURGH
Magnitude: 64.00 MG
Property damage: 80.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous large trees and branches were blown down. Numerous streets were blocked by fallen limbs. Tree limbs fell on at least several houses. Siding was torn off houses. A gust to 74 mph was measured by a spotter overlooking the Ohio River at the old Newburgh Dam.

Thunderstorm Wind in POSEY, INDIANA
From 22-JUN-09 18:00:00 to 22-JUN-09 18:00:00 (CST-6)
Location: MT VERNON
Magnitude: 53.00 MG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A wind gust to 61 mph was measured. A pole barn was destroyed. Trees were blown down. Some of the downed trees landed on power lines, knocking out power for several hours.

Thunderstorm Wind in PIKE, INDIANA
From 22-JUN-09 16:30:00 to 22-JUN-09 16:45:00 (EST-5)
Location: IVY
Magnitude: 78.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A microburst with peak winds estimated near 90 mph affected an area one and a quarter miles wide and five miles long. One vacant mobile home was overturned. Several homes and buildings received minor roof damage, typically partial shingle loss. Dozens of trees and limbs were blown down. Highways 56 and 356 were blocked for a time. The biggest obstruction was on Highway 356 about a quarter-mile west of Highway 257, where downed trees, power lines, and power poles blocked the road for about nine hours. Several power lines were down. A car port was destroyed.