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

The Sunday tornado near Ashby has set a record as the widest tornado ever surveyed in the North Platte National Weather ...

Temperatures in Southern Ontario may reach 30°C, the first of the year, as thunderstorms loom, bringing potential hazards ...

In a video shared by the National Weather Service in Pittsburgh, officials explained that on Saturday evening, a long-lived supercell storm tracked through Ohio, West Virginia, Pennsylvania ...

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

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

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

Devastating tornadoes cause hundreds of millions of dollars in damage and dozens of deaths across the U.S. each year. They ...