Two tornadoes touched down in Ziebach County, South Dakota Tuesday evening, May 12. Scott Olson of Brookings, South Dakota witnessed the first tornado west of Red Elm (first image below). National Weather Service meteorologists confirmed a second tornado occurred after conducting a damage survey.
Based on observed damage, a second tornado touched down about five miles west of Dupree and traveled eight miles, with damage ending about three miles northeast of Dupree. Damage included several barns and grain bins, semi trailers, small mobile homes, and a toppled communications tower. Based on the type of damage, winds were estimated between 100 and 110 mph, giving the second tornado a rating of EF1 on a scale of EF0 to EF5 of the Enhanced Fujita Scale.
First tornado west of Red Elm around 528 pm MDT. No damage was reported with this tornado.
Damage to a barn roof and walls northeast of Dupree
A microwave tower toppled by the winds
Barn damage west of Dupree
Damaged grain bins west of Dupree