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Five things that a hurricane needs ; Click on image for full size (36 Kb); Lisa Gardiner/Windows to the Universe ... One in a while, a tropical thunderstorm grows and grows, becoming a giant hurricane. First the storm grows a little bit. It combines with other thunderstorms and they all spin around an area of low...
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www.windows.ucar.edu/tour/link=/earth/Atmosphere/hurric...
www.windows.ucar.edu/tour/link=/earth/Atmosphere/hurricane/formation.html&edu=elem
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A tropical thunderstorm can grow into a massive hurricane under certain conditions. Sometimes several thunderstorms start rotating around a central area of low pressure. This is called a tropical depression.
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www.windows.ucar.edu/tour/link=/earth/Atmosphere/hurric...
www.windows.ucar.edu/tour/link=/earth/Atmosphere/hurricane/formation.html
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Another way to think of a hurricane is as a large heat engine. The fuel is moisture from warm ocean water. The moisture is converted to heat in the thunderstorms that form. Spiral rain bands that surround the tropical cyclone's core help feed the circulation more heat energy.
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www.weather.com/encyclopedia/tropical/forecast.html
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The reatively peaceful center of the hurricane is called the eye. Around this center winds move at speeds between 74 and 200 miles per hour. As long as the hurricane remains over waters of 79F or warmer, it continues to pull moisture from the surface and grow in size and force.
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www.cotf.edu/ete/modules/sevweath/swhoware.html
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; Hurricane Activities ... Hurricanes form in the tropics, over warm ocean water (over 80ºF or 27ºC) and at latitudes between 8° and 20°, Hurricanes form mostly from June through November (hurricane season). These powerful storms are fueled by the heat energy that is released when water vapor condenses (turns into...
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www.enchantedlearning.com/subjects/weather/hurricane/fo...
www.enchantedlearning.com/subjects/weather/hurricane/formation.shtml
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The birth of a hurricane, having only a slight circulation with no closed isobars around an area of low pressure. Tropical disturbances commonly exist in the tropical trade winds at any one time and are often accompanied by clouds and precipitation.
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ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/hurr/stages.rxml
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The same may occur for the amount of time a tropical storm needs to intensify into a hurricane. Atmospheric and oceanic conditions play major roles in determining these events.
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ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/hurr/stages/home....
ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/hurr/stages/home.rxml
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Image right: A plume of dust blew off the west coast of Western Sahara and Mauritania on July 23, 2006. New research suggests such dust outbreaks may inhibit hurricane formation. Credit: MODIS Rapid Response Team, NASA Goddard Space Flight Center.
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www.nasa.gov/mission_pages/hurricanes/archives/2007/hur...
www.nasa.gov/mission_pages/hurricanes/archives/2007/hurricane_dust.html
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Tampa Bay's news, shopping and information source brought to you by the St. Petersburg Times and tbt*. ... Vertical wind shear is a difference in wind speed or direction at different altitudes. When a hurricane encounters vertical wind shear, the hurricane can weaken.
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www.sptimes.com/2007/04/18/State/Study__Global_warming....
www.sptimes.com/2007/04/18/State/Study__Global_warming.shtml
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