are they classified?
Yes - single-cell, multi-cell, squall line (also called multi-cell line) and supercell thunderstorms
Thunderstorm
There are four main types of thunderstorms: single-cell, multi-cell, squall line (also called multi-cell line) and supercell. Which type forms depends on the instability and relative wind conditions at different layers of the atmosphere ("wind shear"). Single-cell thunderstorms form in environments of low vertical wind shear and last only 20–30 minutes.
what is a common feature of many weather systems responsible for floods in north america Due to a thunderstorm can you describe its life cycle? The developing stage - masses of moisture are lifted upwards into the atmosphere;  the mature stage - the warmed air continues to rise until it reaches an area of warmer air and can rise no farther; and the dissipation stage - downbursts.
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Thunderstorm [SEP] Classification
There are four main types of thunderstorms: single-cell, multi-cell, squall line (also called multi-cell line) and supercell. Which type forms depends on the instability and relative wind conditions at different layers of the atmosphere ("wind shear"). Single-cell thunderstorms form in environments of low vertical wind shear and last only 20–30 minutes. Organized thunderstorms and thunderstorm clusters/lines can have longer life cycles as they form in environments of significant vertical wind shear, normally greater than in the lowest of the troposphere, which aids the development of stronger updrafts as well as various forms of severe weather. The supercell is the strongest of the thunderstorms, most commonly associated with large hail, high winds, and tornado formation.