EF0 Tornado — Decatur, Indiana

2022-04-13 · near Millhousen, Decatur, Indiana

Event narrative

Broad rotation within the squall line's bookend vortex radar signature eventually led to a brief tornado in southeast Decatur County. The only damage was to a lean-to roof and wall on the east side of a farm outbuilding. This section was demolished with sheet metal roofing and wood debris thrown between 200 and 400 yards to the north and north-northwest. A small horse trailer was picked up and thrown to the north side of County Road 800 South. There were no scour or drag marks visible in the ground from where the trailer originally sat. A 2x4 was driven into the ground about 20 yards north of the damaged building. No other damage was found in the area.

Wider weather episode

A deep trough over the Midwest and a moist, buoyant warm sector over the region led to a line of strong storms over southern central Indiana by the early evening. As a squall line organized and enveloped downstream cells, the resulting bowing segments led to damaging winds and broad rotation in a bookend vortex radar signature. Straight line wind damage occurred along the path of the bowing segment, with significant damage to boat docks on Lake Monroe in Monroe County, as well as the Country Squire Lakes trailer park in Jennings County. The region of broad rotation eventually lead to a brief tornado in south-central Decatur County.

View location on OpenStreetMap → (39.2185, -85.4947)

Source: NOAA Storm Events Database, event_id 1007860. Narrative written by the NWS forecast office that issued the report.