Seguiamo i Caraibi

**Flavio 78** · 01/07/2010, 07:54

Landfall a CAT2

**simone** · 02/07/2010, 12:50

Originariamente Scritto da simone

stavo leggendo i dati e ora viene stimato con una pressione di 959hPa e vento a 80mph.
seguendo la scala saffir simpson mi viene da considerare che il dato prioritario sia quello dei venti perchè se guardiamo la pressione sarebbe già un buon terza categoria..

la domanda che mi faccio è..... come fà ad esserci uno sfasamento cosi fra pressione e venti???? non dovrebbe essere un dato che cala proporzionalmente

??

e comunque per mè un buon calo lo ottiene ancora prima del landfall

ah ecco che jeff masters spiega le anomalie di questa depressione fra cui quello strano sfasamento fra pressione e vento

Alex's bizarre behavior
Alex had several rather remarkable features I've never seen in a hurricane. Firstly, it underwent an eyewall replacement cycle as a Category 1 hurricane with 80 mph winds. Usually, we don't see the inner eyewall collapse and an eyewall replacement cycle occur until a hurricane reaches Category 3 strength. I've seen it happen on occasion to a Category 2 storm, but never a Category 1. Secondly, after Alex's inner 9-mile diameter eyewall collapsed at 10am EDT yesterday morning, an outer spiral band began to become the new eyewall. Winds in this outer spiral band/new eywall increased as the day progressed, as typically happens in an eyewall replacement cycle. However, part way through that process, Alex suddenly reversed course, and was able to build a small inner eyewall with a 12-mile diameter that was completed by landfall. I've never seen a hurricane change its mind in the middle of an eyewall replacement cycle and build an inner eyewall so fast. Finally, Alex had an unusually weak winds, considering how low the pressure was. The pressure was more typical of a hurricane one Saffir-Simpson category stronger than what the surface winds suggested.