From popcorn storms to supercells, here’s how thunderstorms form, turn severe and why some produce hail, damaging winds or ...

In late August 2025, a massive wall of dust surged through central Arizona against the backdrop of thunderstorms, burying Phoenix and surrounding metro areas in a choking haze. Power was knocked out ...

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 ...