Severe storms eyeing the Chicago area Tuesday have the potential to produce supercells, considered to be one of the most ...

Thunderstorms need moisture, energy — which meteorologists call instability — and some sort of lift to form. Usually, the lift comes from cold and warmer air masses colliding along a line called a ...

The supercell, king of thunderstorms, disruptor of the Great Plains, is a dangerous weather threat wherever it forms. Tornadoes, flooding, enormous hailstones, damaging winds and lightning are some of ...

(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 ...