supercell
[ soo-per-sel ]
/ ˈsu pərˌsɛl /
noun Meteorology.
a highly organized thunderstorm that can last for several hours, capable of producing both updrafts and downdrafts exceeding 100 miles per hour, large hailstones, tornadoes, and flash flooding (often used attributively): a supercell in Kansas City; supercell storms.