Most Hurricanes are Category 1-3 on the Saffir-Simpson scale. Few are 4 & 5. 1900-2007 climatology.
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Most Hurricanes are Category 1-3 on the Saffir-Simpson scale. Few are 4 & 5. 1900-2007 climatology.
September is Hurricane Month.
Global sea surface temperatures
T > 81 oF=27 °C for hurricane formation
North African dust storms can weaken a hurricane season.
Warm enough ocean temperatures & large enough Coriolis force (Latitudes greater than 10 degrees)
Vertical Wind Shear
Vertical Wind Shear
High Vertical Wind Shear:Destroys hurricane formation
Low Vertical Wind ShearEnhances hurricane formation
Stages in development
20-34 knots
>64 knots
35-63 knots
Complexes of thunderstorms
Names are given to Tropical storms and Hurricanes
Eye
Eye WallRain Bands
Katrina August 28, 2005 TRMM (Tropical Rainfall Measuring Mission)
Surface Pressure lowest in eye and wind speeds highest in eye-wall
Hurricanes are in the water near North America, Typhoons Near Eastern Asia, Cyclones everywhere else.
Climatology
El Nino and Hurricanes
Red- tropical storms and hurricanesYellow- hurricanes onlyGreen- cat 3 or larger.
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