A supercell thunderstrom in Oklahoma. Image courtesy of NSSL/NOAA. The National Weather Service defines a severe thunderstorm as a thunderstorm that is producing: Hail that is at least quarter ...

A so-called supercell storm caused by divergent wind patterns has been captured on video in Texas. What are they and how do they form? The 12ft (3.6m) bronze sculpture, created by Sergio Furnari ...

A colossal storm cloud swept through Sorocaba, São Paulo, on Wednesday, leaving locals stunned by its dramatic and foreboding appearance. Identified as a supercell with a mesocyclone, the cloud ...

A so-called supercell storm caused by divergent wind patterns has been captured on video in Texas. What are they and how do they form? Footage shared by a headteacher shows the charred remains of ...