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EF1 tornado in Cass County, Indiana

Tornado July 10, 2017 · Cass County, Indiana

EF1
Rating
3.8 mi
Whole path
200 yd
Path width

NOAA records this tornado county by county. Its path ran through Carroll County → Cass County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 200 yards (0.11 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

A NWS survey of the area confirmed the touchdown of a tornado in Carroll county, which tracked east into Cass county. Most of the damage was confined to crops along the path. However, several trees were blown down off of S County Road 125 E and 200 E. A poorly anchored smaller barn was destroyed with a nearby larger barn suffering metal roofing damage. A home in the area also suffered minor damage. Maximum winds were estimated at around 95 mph.

The wider storm

Synoptic quasi-stationary boundary was located across the forecast area, initially across northern parts during the morning and then sagging south as an upper level wave moved into the region during the late afternoon and evening hours. A morning complex of storms caused sporadic wind damage as well as some areal flooding. Subsidence behind the system kept any further development of storms limited until the approach of the wave. This wave, combined with the front and instability advected in from central Illinois all set the stage for increasing thunderstorm development. Several supercells developed, producing long lived wall clouds and two confirmed tornadoes. IN addition, training of convection caused flash flooding in some parts of Indiana and Ohio.

Began near Deacon (40.6400, -86.3700).

Other tornadoes from the same storm system

1 more tornado the National Weather Service filed under this storm episode.

Source: NOAA Storm Events Database, event 714901. Narratives are written by the National Weather Service forecast office that issued the report.

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