Northeast Wyoming was covered in a carpet of snow on September 8, forcing road closures and causing power outages, according to local reports.
A record daily low temperature of 31 F was recorded on September 7 by the National Weather Service office in Rapid City, South Dakota. It was the earliest freezing temperature since 1921.
This clip from @iron67mike shows the Devils Tower area covered in snow. Credit: @iron67mike via Storyful