Supercell Rotating thunderstorm with updrafts and downdrafts structured so it can maintain itself for several hours What makes a supercell different from.

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Presentation transcript:

Supercell Rotating thunderstorm with updrafts and downdrafts structured so it can maintain itself for several hours What makes a supercell different from all other thunderstorms? ROTATION Requires both speed and directional wind shear Contains a mesocyclone A cyclonically rotating vortex, 2-10 km in diameter, within a convective storm Often a “right-mover” Moves to the right of the general flow where it gets the best air and rotation is stronger

Where do Supercells Form?

Structure of a Supercell

Radar Structure Map View of a Supercell

Map View of a Supercell V-Notch Updraft obstructs air flow, precipitation pattern gets split BWER – Bounded Weak Echo Region (echo-free vault) Map View of a Supercell

3 May 1999 – Radar Reflectivity

Three Supercell Classifications Low Precipitation (LP) Little to no precipitation Generally does not produce tornadoes Classic Contains structure described already High Precipitation (HP) Lots of precipitation Rain-wrapped tornadoes

LP Supercell

Classic Supercell

HP Supercell

Mammatus Clouds © C. Godfrey 4 June 2001, Wellington, KS

The Take-Home Message About Supercells Supercells are rotating thunderstorms Supercells have one rotating updraft and one or more downdrafts Supercells form in environments with strong wind shear (change in speed AND direction with height) Supercells often produce tornadoes