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

A taste of summer heat in southern Ontario on Tuesday could also set off severe thunderstorms in the afternoon and evening, ...

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

A slow-moving storm system will bring several rounds of showers and thunderstorms across eastern Oklahoma, increasing the potential for locally heavy rainfall and severe weather. All modes of ...