In addition to the same start conditions as are necessary for an ordinary thunderstorm, what does a supercell
thunderstorm require to form?

Question

In addition to the same start conditions as are necessary for an ordinary thunderstorm, what does a supercell 
 thunderstorm require to form?

Accepted Answer

Very moist air at low level and wind shear that increases with height.

Answer

Warm, dry air at low level and extremely stable conditions.

Answer

Cold, dry air at low level that is overlain by warm, moist air above.

Answer

cold, moist air at medium level and stable air at high level.

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