hurricane_run
(Storm Tracker)
Sat Jul 09 2005 06:08 PM
Deepening Questions

These are the parameters from the NHC
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

Rapid Deepening:
A decrease in the minimum sea-level pressure of a tropical cyclone of 1.75 mb/hr or 42 mb for 24 hours.

here is the link
hope this helps


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