What is Rapid deepening?
[[Image:Charley Rapid Deepening.jpg|thumb|250px|[[Hurricane Charley]] nearing landfall on [[Florida]] after its rapid deepening phase.]] '''Rapid deepening''' is a condition that happens when the minimum sea-level [[atmospheric pressure]] of a [[tropical cyclone]] goes down at lot very quickly. The [[National Weather Service]] describes rapid deepening as a decrease of 42&nbsp;[[bar (unit)|millibars]] in less than 24&nbsp;[[hour]]s.<ref>{{cite web | author=[[National Hurricane Center]] | date = January 17, 2006 | title=Glossary of NHC/TPC Terms | publisher=[[NOAA]] | accessdate=2006-06-07 | url=http://www.nhc.noaa.gov/aboutgloss.shtml}}</ref> However, this phrase is usually applied to most storms that are quickly becoming stronger. ==References== {{reflist}} {{weather-stub}} [[Category:Meteorology]] [[Category:Tropical cyclones]]