Presentation Topic (Weather associated with hurricanes) Name: Jhon Pierre Maxwell Class: 6B Geography Date: 21/10/2012

Overview Hurricanes are tropical cyclones of the Atlantic. They form after the ITCZ has moved to its most northerly extent enabling air to converge at low levels, and can have a diameter of 650km.

Purpose Hurricanes are intense hazards which bring heavy rainfall, strong winds, high waves and cause other disasters such as flooding and mudslides.

Main Parts Eye-Is the center of circulation, and area of lowest pressure within a hurricane. Within the eye of a hurricane, you will encounter clear skies and calm winds Eye Wall- Is the narrow area of intense thunderstorms that surround the eye of a hurricane. Outflow- This is the outer fringe of a hurricane that serves as a very important element in hurricane development. That is because the outflow represents all the energy being released by the hurricane. Central Dense overcast- is the mass of embedded clouds that make up the inner portion of the hurricane.

Operation Hurricanes develop as intense low pressure systems over tropical oceans. Winds spiral rapidly around calm central areas known as the eye. Hurricanes moves excess heat from low latitudes to higher latitudes. They normally develop in the westward flowing air just north of the equator (easterly wave)

Hurricanes occur when temperatures, pressure and humidity are uniform over a wide area in the lower troposphere for a lengthy period.

Maintenance Sea temperatures must be over 27 degrees Celsius( Warm water gives off large quantities of heat when it is condense. This heat drives the hurricane) The low pressure area has to be far enough from the equator so that the coriolis force( the force caused by the rotation of the earth) creates rotation in the rising air mass.

If it is to close to the equator there is insufficient rotation and the hurricane would not develop To enable the hurricane to move, there must be a continuous source of heat to maintain the rising air currents.

More Information http://www.hurricaneville.com/components.html Geography an integrated approach third edition. Advance Geography.