August 11, 2013 - A small tornado touched down south of Hill City, South Dakota on Sunday, August 11, snapping large Ponderosa pine trees.  The only structural damage noted was torn shingles on two houses.  Based on this damage, winds were estimated around 100 mph, giving the tornado a rating of EF-1 on the Enhanced Fujita Scale. The visible damage indicated the tornado was about 1.4 miles long and 50 yards wide.

Trees blown down over the Mickelson Trail south of Hill City
Trees blown over the Mickelson Trail south of Hill City.

One of the large ponderosa pine trees snapped by the tornado
Large Ponderosa pine tree snapped by the tornado is the U.S. government's official web portal to all federal, state and local government web resources and services.