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EF0 tornado in Custer County, South Dakota

Tornado August 30, 2013 · Custer County, South Dakota

EF0

Rating

0.0 mi

Path length

10 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

NOAA recorded where this tornado touched down but not where it lifted, so it appears as a point. Other tornadoes recorded nearby that day are shown faint.

What EF0 means. On the Enhanced Fujita scale, EF0 is light damage: shingles and siding peeled, gutters torn, branches broken, consistent with estimated gusts of 65–85 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 small tornado briefly touched down in a pasture east of Hermosa.

The wider storm

A supercell thunderstorm developed near Piedmont and moved slowly southeastward across the Rapid City area and the eastern foothills of the Black Hills. The storm produced very large hail, which caused significant property damage from Johnson Siding and Hisega to Rapid City. The storm also spawned a very brief tornado over prairie land east of Hermosa. Runoff from the slow moving thunderstorm caused street flooding in Rapid City and Rapid Creek to quickly rise into the greenway through town.

Began near Folsom (43.7900, -102.9600).

Source: NOAA Storm Events Database, event 476085. Narratives are written by the National Weather Service forecast office that issued the report.

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