Which type of thunderstorm forms quickly due to local surface heating and dissipates quickly?

Which type of thunderstorm forms quickly due to local surface heating and dissipates quickly?

• A. Air Mass
• B. Steady State
• C. Embedded
• D. Microburst

Answer: (A)

Air mass thunderstorms pop up quickly from local surface heating. When the ground heats up, the near-surface air becomes buoyant and starts to rise, forming a small, simple updraft that quickly develops into a thunderstorm. Because this development is driven by heating over a relatively small area and there isn’t a larger-scale lifting mechanism feeding the storm, it tends to be short-lived. Once the surface heat wanes or the air aloft becomes more stable or drier, the updraft weakens and the storm dissipates, often within about a half hour to an hour. This contrasts with steady-state or embedded storms, which rely on persistent forcing from a larger weather system, or with microbursts, which are intense downdrafts inside a mature storm rather than the initial formation type. Air mass thunderstorms are the classic example of heat-driven, quickly formed and quickly dissipated convection.

Air mass thunderstorms pop up quickly from local surface heating. When the ground heats up, the near-surface air becomes buoyant and starts to rise, forming a small, simple updraft that quickly develops into a thunderstorm. Because this development is driven by heating over a relatively small area and there isn’t a larger-scale lifting mechanism feeding the storm, it tends to be short-lived. Once the surface heat wanes or the air aloft becomes more stable or drier, the updraft weakens and the storm dissipates, often within about a half hour to an hour.

This contrasts with steady-state or embedded storms, which rely on persistent forcing from a larger weather system, or with microbursts, which are intense downdrafts inside a mature storm rather than the initial formation type. Air mass thunderstorms are the classic example of heat-driven, quickly formed and quickly dissipated convection.