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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.

www.studyblue.com/notes/note/n/chapter-11/deck/8652192

The leading edge of a thunderstorm's cold downdraft is known as a: gust front ... Air mass thunderstorms only last about one hour and begin to dissipate when:.

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.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, ...

mrcc.isws.illinois.edu/living_wx/thunderstorms/index.html

Thunderstorms can be short-lived (30 minutes to 1 hour) single-cell storms, or can ... of severe thunderstorms with large hail, strong winds, and tornadoes that last many hours. ... the cloud with warm, moist air, the storm begins to fall apart or "dissipate. ... Single cell air mass thunderstorms grow, produce rain with some gusty ...

www.tulane.edu/~sanelson/geol204/tornadoes.htm

Nov 6, 2014 ... With lack of updrafts of warm moist air, the cloud begins to dissipate and eventually it stops raining. Thunderstorms can form as single cells, with only one cloud mass, ... to 500 km/hr [318 miles per hour]), but affect a much smaller area than ... Tornado awareness has reduced the death toll over the last 40 ...

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.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 ...

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  ...