Air-mass Thunderstorm - Generally, a thunderstorm not associated with a front or other type of synoptic-scale forcing mechanism.
Air-Mass Thunderstorm- a thunderstorm which forms from localized convection within an unstable air mass (e.g., not along a frontal boundary); because all thunderstorms are associated with some type of forcing mechanism, ...
Air-Mass Thunderstorm - A localized thunderstorm that forms in a warm, moist, unstable air mass. Most frequent in the afternoon in spring and summer.
Since all thunderstorms are associated with some type of forcing mechanism, synoptic-scale or otherwise, the existence of true air-mass thunderstorms is debatable.Air PollutantHarmful substance or product introduced into the atmosphere.
Individual thunderstorms typically are of the type sometimes referred to as air-mass thunderstorms. These thunderstorms are small, short-lived, very rarely severe, and they almost always dissipate near or just after sunset.
The scattered thunderstorms that develop in the summer are called air-mass thunderstorms because they form in warm, maritime tropical air masses away from other weather fronts.
A thundershower is a popular term usually applied to a mild thunderstorm. There are three main types of thunderstorms, classed by the mechanism that triggers them: advection thunderstorm, air-mass thunderstorm, frontal thunderstorm.
are capable of producing multiple tornadoes (i.e., a tornado family) and/or several bursts of severe weather. A thunderstorm that undergoes only one cycle (pulse), and then dissipates, is known as a pulse thunderstorm or air-mass thunderstorm.
 See also: Hail, Thunder, Light, Horizon, Storm
  
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