A strong trough exiting the Rockies lead to explosive development of low pressure during the day Wednesday February 11th. At dawn, low pressure  near 998 mb formed over southern Missouri. This cyclone deepened to 986 mb as it crossed into southern Michigan by late evening.
Convective showers along an occluded front crossed southern Indiana during the early afternoon. This line brought isolated gusts of 50 to 60 mph. Behind this front, gradient winds increased to 35 mph...with gusts up to 65 mph during the late afternoon and early evening. Scattered structural damage, tree damage and power outages resulted.

Thunderstorm Wind in CRAWFORD, INDIANA
From 11-FEB-09 15:50:00 to 11-FEB-09 15:50:00 (EST-5)
Location: PILOT KNOB
Magnitude: 56.00 EG
Reported by: Trained Spotter

Tree tops were broken off along with six inch thick tree limbs.

Thunderstorm Wind in HARRISON, INDIANA
From 11-FEB-09 15:58:00 to 11-FEB-09 15:58:00 (EST-5)
Location: NEW SALISBURY
Magnitude: 56.00 EG
Reported by: Trained Spotter

A twelve inch evergreen tree was uprooted.

Thunderstorm Wind in HARRISON, INDIANA
From 11-FEB-09 16:00:00 to 11-FEB-09 16:00:00 (EST-5)
Location: CORYDON
Magnitude: 61.00 EG
Reported by: Trained Spotter

A roof was blown off a business and power poles were snapped on the northwest side of Corydon.

High Wind in CLARK, INDIANA
From 11-FEB-09 18:30:00 to 11-FEB-09 21:00:00 (EST-5)
Magnitude: 61.00 EG
Reported by: Trained Spotter

The metal roof of the Charlestown Fire Department was blown off into the street.

High Wind in SCOTT, INDIANA
From 11-FEB-09 18:38:00 to 11-FEB-09 21:00:00 (EST-5)
Magnitude: 56.00 EG
Reported by: Broadcast Media

Windows were blown out of a house in Scottsburg.

High Wind in DUBOIS, INDIANA
From 11-FEB-09 17:19:00 to 11-FEB-09 21:00:00 (EST-5)
Magnitude: 50.00 MG
Reported by: Trained Spotter

The measured wind gust occurred at Jasper Middle School.

High Wind in HARRISON, INDIANA
From 11-FEB-09 16:35:00 to 11-FEB-09 21:00:00 (EST-5)
Magnitude: 55.00 EG
Reported by: Trained Spotter

Trees limbs were downed in Corydon.

High Wind in CRAWFORD, INDIANA
From 11-FEB-09 17:34:00 to 11-FEB-09 21:00:00 (EST-5)
Magnitude: 70.00 EG
Reported by: Trained Spotter

A porch roof was blown off near English.

High Wind in CRAWFORD, INDIANA
From 11-FEB-09 17:35:00 to 11-FEB-09 21:00:00 (EST-5)
Magnitude: 52.00 EG
Reported by: Trained Spotter

Wind gusts tore shingles off of a roof in Leavenworth.

Thunderstorm Wind in DUBOIS, INDIANA
From 11-FEB-09 12:50:00 to 11-FEB-09 12:50:00 (EST-5)
Location: BIRDSEYE
Magnitude: 52.00 EG
Reported by: Law Enforcement

A car was blown off State Road 145 near Birdseye.

High Wind in FLOYD, INDIANA
From 11-FEB-09 16:00:00 to 11-FEB-09 21:00:00 (EST-5)
Magnitude: 61.00 EG
Reported by: Broadcast Media

Power poles were downed by high winds along Scottsville Road near Floyds Knobs.

Thunderstorm Wind in PERRY, INDIANA
From 11-FEB-09 13:27:00 to 11-FEB-09 13:27:00 (EST-5)
Location: TELL CITY
Magnitude: 52.00 EG
Reported by: Law Enforcement

Trees were reported down in Tell City.

Thunderstorm Wind in JEFFERSON, INDIANA
From 11-FEB-09 16:36:00 to 11-FEB-09 16:36:00 (EST-5)
Location: HANOVER
Magnitude: 61.00 EG
Reported by: Broadcast Media

The roof of Southwest High School in Hanover was damaged, with several large sections of sheet metal blown off.