Supercells are the mightiest of the thunderstorms. They can roll for hours while maintaining tornadoes and damaging hail.

Twenty-three years ago, the historic La Plata tornado, a deadly supercell storm, hit southern Maryland and parts of the ...

A supercell storm along the Mason-Dixon Line brought nearly hurricane-force winds through northern Maryland and southern PA ...

A supercell is a thunderstorm with a rotating updraft, which is classified as a mesocyclone. The rotating updraft is what sets a supercell apart from a typical thunderstorm. In order for a ...

The weather service said there is a potential for hail to be baseball-sized or even larger for several hours after sunset.

Winds surpassing 100 km/h and ping-pong ball-sized hail are in the forecast for parts of southern and eastern Ontario Tuesday.

The National Weather Service says supercell thunderstorms are possible April 28 in central Wisconsin with golf-ball size hail ...

More than 36 hours after a supercell storm tore through northern West Virginia, thousands of people are still without power.