Damage Survey News (Updated 4/22)

Weather Service Damage Survey Results from Severe Weather on April 19–20, 2011

The National Weather Service conducted surveys of areas impacted by the severe weather that occurred across portions of central Indiana on April 19-20.  Below are the results of the storm surveys. A general review of the event is available on a separate page:


Overview of the tornado paths. Click to Enlarge


1. Vermillion-Parke-Fountain Counties EF-2 Tornado. Wind Speed estimated around 120 mph.

Vermillion-Parke-Fountain county tornado path. Click to enlarge


2. Tippecanoe County EF-2 Tornado:

Tippecanoe Tornado Path - Click to Enlarge

3. Boone County EF-1 Tornado (near Thorntown): Path length of a half mile. Path width of 50 yards.

Boone County Tornado Path - Click to Enlarge

EF-1 tornadoes typically have winds of 86-110 mph, while EF-2 tornadoes have winds of 111-135 mph. More information on the EF Scale is available from the Storm Prediction Center

Straight Line Wind Damage: 

  • East of Thorntown near the intersection of State Road 47 and US Highway 52 (Boone County):  Partial damage to a barn from straight line winds.
  • Four miles southeast of Mulberry (Clinton County):  Damage due to straight line winds.
  • Buck Creek (Northeast Tippecanoe County):  Damage due to straight line winds
  • Crawfordsville (Montgomery County): Straight line wind damage; winds speeds estimated around 70 mph
  • Carlisle (Sullivan County):  South of Carlisle in an area east of 41 to just west of Old 41 between CR 900 and CR 1000 straightline wind damage was observed with debris in a general north-easterly path of around a half mile in length. Damage was primarily to metal structures and metal roofs with a few trees down.
  •  Popcorn (Lawrence County): Straight line wind damage was observed to some farm buildings, trees, and tree limbs.


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