Two tornadoes touch down in western South Dakota
RAPID CITY, S.D. — The Rapid City National Weather staff has announced that two tornadoes occurred in western South Dakota on Friday, July 10.
The first tornado touched down near Tinton by the Wyoming state line, southwest of Spearfish. It traveled to the east-southeast, crossing Spearfish Canyon south of Savoy and eventually weakened around the Terry Peak Ski area.
The result from the first tornado was uprooted and snapped trees as well as wind speeds of 105 mph. It received an EF1 rating out of a EF0 to EF5 scale. No structural damage was reported or observed. The path and length will be determined once the results of the aerial survey conducted by the U.S. Forest Service are available.
This was the second tornado that came through the northern Black Hills in the last five days, after another larger/stronger EF2 tornado touched down in Sundance on Monday, July 6. It traveled east and dissipated before reaching Cheyenne Crossing.
The second tornado occurred in western Bennett County where Weather Spotters from the Martin Volunteer Fire Department reported that it touched down between Allen and Batesland. The tornado then traveled to the southeast, likely crossing U.S. Highway 18 before dissipating. The damage survey concluded that some structural damage and tree damage consistent with an estimated wind speed of 110 mph and an EF1 rating.
More information will be available here when the surveys are completed.