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en.wikipedia.org/wiki/Air-mass_thunderstorm

An air-mass thunderstorm, also called an "ordinary", "single cell", or "garden variety" ... Air-mass thunderstorms do not move quickly, last no longer than an hour, and ... with undercuts the storm's low level inflow, and quickly causes dissipation.

en.wikipedia.org/wiki/Supercell

A supercell is a thunderstorm characterized by the presence of a mesocyclone: a deep, ... Because they can last for hours, they are known as quasi-steady-state ... Supercells are one of the few types of clouds that typically spawn tornadoes within .... humidity, and condensation of the converging of air masses, can reach very ...

studylib.net/doc/7067535/chapter-14

The growth and decay of an ordinary (air mass) thunderstorm is illustrated well on ..... Ordinary thunderstorms only last about one hour and begin to dissipate ...

www.richhoffmanclass.com/images/chapter10/10thunderstorms.ppt

Ordinary “Air Mass” Thunderstorms Dissipating Stage. After the storm enters the mature stage, it begins to dissipate in about 15 to 30 minutes. Dissipating stage ...

www.wunderground.com/resources/severe/severe_glossary.asp

Air mass thunderstorms typically are associated with warm, humid air in the summer ... the afternoon in response to insolation, and dissipate rather quickly after sunset. ... interchangeably, although thunderstorms are only one form of convection. .... level, beginning within six hours of the causative event (e.g., intense rainfall, ...

www.st-andrews.ac.uk/~dib2/climate/thunders.html

Under conditions of absolute instability, convection can dissipate energy building up at ... Thus the atmosphere will only exhibit instability below Zi: in more concrete terms, this ... Air mass thunderstorms typically follow life cycles over 1-2 hours. The storm begins as uplifting warm air crosses the Level of Free Convection, and ...

climate.ncsu.edu/edu/k12/.thunderstorm

Aug 9, 2013 ... The rising updraft of air will begin to cool and condense as it rises, ... degrees by 5:00 P.M., a 40 degree temperature swing in one hour! ... Once this happens, the storm goes into its last stage (Figure D). ... The thunderstorm slowly dies out and leaves only wispy clouds behind as evidence of its existence.

www.physicalgeography.net/fundamentals/7t.html

1) Air mass thunderstorms which occur in the mid-latitudes in summer and at the .... Severe thunderstorms dissipate only when no more warm moist air is ... This condition occurs several hours after nightfall when the atmosphere begins to cool off. .... In the United States, about 40,000 tornadoes have occurred in the last fifty  ...

www.studyblue.com/notes/note/n/quiz-10-meteorology/deck/13158695

Dec 9, 2014 ... A group of thunderstorms which develop in a line one next to the other, ... where a warm, dry air mass encounters a warm, moist air mass. ... Ordinary cell thunderstorms only last about one hour and begin to dissipate when.

www.meto.umd.edu/~hudson/aosc200.d/Ch11Notes.htm

Thunderstorms require warm, moist air, so they are most prevalent in regions with ... air masses and in regions where mountains and frontal cyclones help lift air vertically. ... The Mature Stage begins when precipitation starts to fall from the cloud. ... wrap around one another, and they last for several hours because updrafts ...