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Most Hurricanes are Category 1-3 on the Saffir-Simpson scale. Few are 4 & 5. 1900-2007 climatology.

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Presentation on theme: "Most Hurricanes are Category 1-3 on the Saffir-Simpson scale. Few are 4 & 5. 1900-2007 climatology."— Presentation transcript:

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2 Most Hurricanes are Category 1-3 on the Saffir-Simpson scale. Few are 4 & climatology.

3 September is Hurricane Month.

4 Global sea surface temperatures T > 81 o F=27 °C for hurricane formation

5 North African dust storms can weaken a hurricane season.

6 Warm enough ocean temperatures & large enough Coriolis force (Latitudes greater than 10 degrees)

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8 Vertical Wind Shear

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10 High Vertical Wind Shear: Destroys hurricane formation

11 Low Vertical Wind Shear Enhances hurricane formation

12 Stages in development knots >64 knots knots Complexes of thunderstorms Names are given to Tropical storms and Hurricanes

13 Eye Eye Wall Rain Bands

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16 Katrina August 28, 2005 TRMM (Tropical Rainfall Measuring Mission)

17 Surface Pressure lowest in eye and wind speeds highest in eye-wall

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19 Hurricanes are in the water near North America, Typhoons Near Eastern Asia, Cyclones everywhere else.

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25 Climatology

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34 El Nino and Hurricanes

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37 Red- tropical storms and hurricanes Yellow- hurricanes only Green- cat 3 or larger.


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