Hurricanes

Nature’s Tropical Cyclones

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my evaluation process!

What Are What Are Hurricanes?Hurricanes?

Tropical cyclones Tropical cyclones (lows) with (lows) with sustained winds sustained winds of more than 74 of more than 74 mi/h.mi/h.

Normal sea level air Normal sea level air pressure is 1010 pressure is 1010 mbmb

In hurricanes air In hurricanes air pressure can reach pressure can reach 900mb900mb

882 mb Hurricane Wilma 2005

Where do they Where do they form?form?

Hurricanes form Hurricanes form over oceans over oceans when water when water temperatures temperatures reach above 80 reach above 80 degrees.degrees.

Where do they Where do they form?form?

Hurricanes form Hurricanes form over the Atlantic over the Atlantic OceanOcean

Indian Ocean: Indian Ocean: Tropical CyclonesTropical Cyclones

Western Pacific Western Pacific Ocean: Typhoons Ocean: Typhoons

When do they When do they form?form?

Atlantic Hurricane Atlantic Hurricane Season runs Season runs from June from June through through November.November.

Needs water Needs water temperature temperature above 80 degreesabove 80 degrees

2005 had storms 2005 had storms into Decemberinto December

How Do Hurricanes How Do Hurricanes FormForm

How Do Hurricanes How Do Hurricanes FormForm

Hurricanes get their Hurricanes get their energy from warm, energy from warm, humid air from the humid air from the oceans surface.oceans surface.

Winds spiral counter-Winds spiral counter-clockwise clockwise same as all same as all low pressure in low pressure in northern hemisphere. northern hemisphere.

How Do Hurricanes How Do Hurricanes FormForm

Lowest air Lowest air pressure is pressure is found in the found in the eye of the eye of the hurricanehurricane

Low pressure Low pressure forms due to forms due to the warm moist the warm moist air risingair rising

The Eye Of A The Eye Of A HurricaneHurricane

Eye of HurricaneEye of Hurricane Center of stormCenter of storm Lowest PressureLowest Pressure Calmest WindsCalmest Winds Clear SkiesClear Skies

Eye of a hurricaneEye of a hurricane

Eye Wall:Eye Wall: Area around eye Area around eye Most intense part Most intense part

of stormof storm Surrounded by Surrounded by

huge huge cumulonimbus cumulonimbus cloudsclouds

Hurricane EyeHurricane Eye

Hurricane IntensityHurricane Intensity

Hurricane DamageHurricane Damage

Storm Surge: Storm Surge: ““Wall” of water Wall” of water

that comes that comes onshore with onshore with stormstorm

Most Most dangerous dangerous impact from impact from hurricaneshurricanes

Hurricane DamageHurricane Damage