Incident Summary
In a written statement, the pilot described the event, noting that on approach the winds were "8 knots but shifting from 140 degrees to 210 degrees." After touching down on the right tire, he reduced engine power. Before the left tire made contact with the runway, the pilot stated, "the aircraft pivoted on the right tire and shot to [his] left."
Attempted Recovery
In an effort to regain control, the pilot applied full power, but the aircraft continued off the runway. It came to rest facing approximately 180 degrees from the original landing direction.
Meteorological Information
A METAR observation from Idaho Falls (1353 UTC) reported winds from 190 degrees at 10 knots, consistent with the pilot's account of shifting winds.