Stages of development - Hurricane
As surface
pressures continue to drop, a tropical storm
becomes a hurricane when sustained wind speeds
exceed 64 knots.
A pronounced
rotation develops around the central core as
spiral rain bands rotate around the eye of the
storm.
The heaviest
precipitation and strongest winds are associated
with the eye wall.
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![](graphics/stages4.gif) image adopted from WW2010 Online Guides
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