![Le Cyclone Katrina. Cyclone Katrina dans le Golfe du Mexique. Credit: GOES 12 Satellite, NASA, NOAA === Explanation: Where will Hurricane Katrina go? One of the stronger storm systems of modern times appears headed for landfall somewhere in the southern USA sometime today. Katrina was designated yesterday a rare Category 5 Hurricane, the strongest designation for a storm on Earth, and one that indicates sustained winds greater than 250 kilometers per hour. Pictured above is a digitally processed image from the orbiting GOES-12 weather satellite that shows the massive storm system yesterday in the Gulf of Mexico. Starting as a slight pressure difference, hurricanes grow into large spiraling storm systems of low pressure, complete with high winds and driving rain. A hurricane is powered by evaporating ocean water, and so typically gains strength over warm water and loses strength over land. Much remains unknown about hurricanes and cyclones, including how they are formed and the exact path they will take. Le Cyclone Katrina. Cyclone Katrina dans le Golfe du Mexique. Credit: GOES 12 Satellite, NASA, NOAA === Explanation: Where will Hurricane Katrina go? One of the stronger storm systems of modern times appears headed for landfall somewhere in the southern USA sometime today. Katrina was designated yesterday a rare Category 5 Hurricane, the strongest designation for a storm on Earth, and one that indicates sustained winds greater than 250 kilometers per hour. Pictured above is a digitally processed image from the orbiting GOES-12 weather satellite that shows the massive storm system yesterday in the Gulf of Mexico. Starting as a slight pressure difference, hurricanes grow into large spiraling storm systems of low pressure, complete with high winds and driving rain. A hurricane is powered by evaporating ocean water, and so typically gains strength over warm water and loses strength over land. Much remains unknown about hurricanes and cyclones, including how they are formed and the exact path they will take.](https://cdn.futura-sciences.com/cdn-cgi/image/width=1024,quality=50,format=auto/sources/images/diaporama/572-cyclone-ouragan-katrina-rita-wilma-dans-les-caraibes/-_572-cycloneouragan.jpg)
Cyclone - ouragan : Katrina, Rita & Wilma dans les Caraïbes
Katrina est un des ouragans les plus puissants qui ait frappé les États-Unis. Accompagné de vents dépassant 220 km/h, ce cyclone de catégorie 5, s'est abattu fin août 2005 sur la Louisiane, le Mississippi, l'Alabama et l'ouest de la Floride, faisant des centaines voire des milliers de morts. L'ouragan Rita était lui-aussi de catégorie 5 après être entré dans le golfe du Mexique. Il a touché les côtes est du Texas et de ouest de la Louisiane le 24 septembre 2005, vers deux heures du matin heure locale, avec des vents de 200 km/h en rafales. Wilma, douzième ouragan de l'année, a également fait de nombreuses victimes en cette terrible année.
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Ouragan
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Ouragan en Atlantique
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