hail storm.

baseball-sized hail damaged vehicles on Highway 16.

Marilyn Brandt of Ellsworth Air Force Base holds up her cell phone to try to get reception to call emergency services after her 2007 Dodge Caliber was damaged by a hail storm along Eastbound Highway 16 just East of Rockerville. "As soon as the storm hit, it knocked down the GPS and we pulled over," Brandt, who was driving with two friends, said. "We freaked out and closed our eyes. My friends said 'don't look behind you.' The windshield cracked."

this image is © 2010 Rapid City Journal and may not be reprinted or used without permission.