A ‘multi-day severe weather event’ threatens large parts of the US with heavy rain and hail, tornadoes, and powerful supercell thunderstorms. As California battles the worst snowstorm for a ...

Supercell thunderstorms ... to reveal enormous voltages within a thunderstorm. That large-scale approach would mean waiting and hoping for a storm to pass close enough to observe.

A supercell thunderstrom in Oklahoma ... your local Weather Service office will issue a severe thunderstorm warning or a tornado warning. Lightning and heavy rainfall are dangerous elements ...

A supercell is a thunderstorm that is characterized by the presence of a mesocyclone: a deep, persistently rotating updraft. Supercells are typically also classified as severe thunderstorms ...