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Explosive Deepening A decrease in the minimum sea-level pressure of a tropical cyclone of 2.5 mb/hr for at least 12 hours or 5 mb/hr for at least six hours.
In low pressure systems, EXPLOSIVE DEEPENING is a term used for systems with a rapid drop is pressure in a 12 to 36 hour period, such as about 2.5 MB per hour. In tropical, hybrid, and extratropical storms, explosive deepening causes a BOMB storm.
 See also: Water, Surface, Should, Satellite, Rainfall
  
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