http://www.hurricanestorm.com/_typhoon.htm

As a result of the extremely low
central air pressure (around 28.35 in/72 cm of mercury), air spirals
inward toward the hurricane's eye, an almost calm area about 20 mi
(30 km) in diameter.

Tehat valoban alacsony a legnyomas, es csaknem szelcsend.
Lehet hogy osszekevertem az anti-ciklonnal.