Historic first as two topmost hurricanes land in same ye - 颱風討論

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http://news.yahoo.com/s/afp/20070904/ts_alt_afp/centramcaribbean

MIAMI (AFP) - For the first time on record, two Atlantic hurricanes have made
landfall at category five in the same year as Hurricane Felix slammed ashore
Tuesday at the topmost intensity on the Saffir-Simpson scale, according to
data from the US National Hurricane Center.

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The powerful storm roared ashore in northeastern Nicaragua with maximum
sustained winds of 260 kilometers (160 miles) per hour, and higher gusts,
before weakening to a category three hurricane, said the Miami-based NHC.

Its landfall marked the first time two hurricanes hit land at the topmost
category in the same year since a storm was first reliably recorded at that
intensity in 1928.

Dean, this year's first hurricane, hit Mexico's Caribbean coast at category
five on August 21. Its rampage through the Caribbean and Mexico left 30
people dead.

Hurricane Felix had reached category five on Sunday, when it strengthened
from a category two in a record 15 hours, according to the NHC. It dropped to
category four on Monday but regained strength just before landfall.

Only 30 previous Atlantic hurricanes are reliably known to have reached
category five, starting with a 1928 storm nicknamed Okeechobee that left a
trail of death and devastation in the Leeward Islands, Puerto Rico, the
Bahamas and Florida.

Among the storms to reach category five was Hurricane Mitch, which in 1998
devastated the same area now battered by Felix.

While Mitch made landfall as a category one hurricane, its slow motion meant
it dropped massive amounts of rain over Honduras and Nicaragua, causing
catastrophic flooding and becoming one of the deadliest hurricanes in
history, with more than 9,000 people dead and as many reported missing.

In 2005, a record four Atlantic hurricanes reached category five, including
Hurricane Katrina that left 1,500 people dead in New Orleans and along the US
Gulf coast. Katrina made landfall as a category three hurricane, with
sustained winds of 205 kilometers (125 miles) per hour.

A category five hurricane on the Saffir-Simpson scale packs maximum sustained
winds of over 249 kilometers (155 miles) per hour. The NHC calls such
hurricanes "potentially catastrophic."

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