Supercell thunderstorms, explained

By CNN Meteorologist Mary Gilbert (CNN) — Supercell thunderstorms are dangerous severe storms that unleash destructive hail, roaring winds and powerful tornadoes. They are responsible for nearly all of the United States’ most violent tornadoes and the largest hailstones. Here’s what makes them so potent. Thunderstorms 101 Thunderstorms need moisture, energy — which meteorologists call