Not Quite Tornadic

Puzzle 10 of Famous Women in Science Hard Pack

Question is: Not Quite Tornadic

and the answer is: SUPERCELL

Word Meaning:

SUPERCELL — (meteorology) A severe thunderstorm with updrafts and downdrafts that are in near balance, allowing the storm to maintain itself for several hours. Supercells often produce large hail, powerful downpours, very strong winds and sometimes tornadoes.

Definitions from Wiktionary.