What are Supercells?
A supercell is a thunderstorm with a deep, persistently rotating updraft.
Supercells are the least common form of thunderstorm yet they are potentially the most violent. Large hail of greater than baseball size, strong damaging winds, and tornadoes can accompany these storms.
To storm chasers, Supercells are the grand catch — they are the bounty which storm chasers most commonly hunt for.