16 years ago: Vivian hailstorm made history

SIOUX FALLS, S.D. (KELO)-- On July 23, 2010, it was a hot and humid day across South Dakota. As a low-pressure system moved into the area, it sparked showers and thunderstorms by late afternoon and into the evening. It was a prime environment for storms to become severe quickly. Several severe thunderstorm warnings were issued [...]