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

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

A supercell made for an ominous light show in south Oklahoma on Monday, April 28, as a tornado warning and severe ...

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

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

AccuWeather's Tony Laubach reported live as supercells developed in Texas on the evening of April 28, ratcheting up the ...

LUBBOCK, Texas (KCBD) - 10 tornadoes moved across parts of the Rolling Plains northeast and east of Lubbock on the evening of ...

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