TyphoonPurple

=__ Typhoons __= Matt Shinnick and Kenyon Alexander

Introduction  Our severe weather is typhoons. A typhoon is a tropical cyclone, known in the northern hemisphere as a hurricane. It is a cyclone of the western pacific area and the Chinese sea. Its is a rain with high winds and mostly occurs in Asia of the pacific. They occur usually about 25-30 and sometimes even 40 times in a year. They usually rotate in a counter clockwise rotation.

Dangers Typhoons include thunderstorms and winds. Severe winds created by typhoons can reach up to 74 mph, which can bring about intense flooding and also damage or destroy unstable buildings. For many population centers near or below the sea level, the combination of tumultuous rain and high winds can cause devastating flooding, usually the worst problem for people. Conditions of Formation What causes this extreme weather to occur? Explain using your knowledge of humidity, air pressure etc. This is the key science application section.

In order for a cyclone to occur, there are[| 7 atmospheric conditions] that must be met : 1. There must be a low pressure system to create winds and uplift 2. There must be a ground (or in this case water) level tempurature of about 80 degrees (F) and a water depth of about 150ft. 3. Low atmospheric stability to allow cumulonimbus clouds to build to huge heights. High stability will inhibit cloud growth. 4. The area must be within 4-5 degrees of the equator to have the correct ratio of [|Coriolis force] and pressure-gradient force. 5. There must be a humid mid-level atmosphere. 6. There must be some form of wind pushing up to allow clouds to build great heights and to help with the spinning action. 7. Divergence in the upper atmosphere to allow for the transport of mass away from the hurricane.

If all of these conditions are met, then storms will begin to organize while winds direct themselves towards the center of low pressure. The vertical wind that expands the gigantic cumulonimbus clouds will then create the counterclockwise spinning motion of the typhoon when it meets these incoming winds. Historical Examples - In 1912 and in 1992 there were big typhoons in china. in 1912 the death total after it hit in china was approximately 40,000. -- In 1992 the death total after the typhoon hit in china was approximately 60,000.

Super Typhoon Nina struck mainland China in 1975, leaving a wide path of destruction and most importantly breaking the Banqiao Dam, causing intense flooding. This flooding consequently broke 62 other dams on the network of rivers. Super Typhoon Nina killed well over 100,000 people and caused over a billion dollars (U.S. currency) in damage repairs.

Safety Here are [|7 helpful tips] to help you stay safe and prepare for a typhoon. 1. Store enough food and drink for several days- a typhoons destructive power can prevent leaving the house or getting to a store. 2. If caught outdoors, seek high ground and some sort of durable shelter. 3. If you suspect that your home is not sturdy enough to withstand a typhoon's high winds, evacuate to the nearest shelter. There is no need to endanger yourself by staying inside an unstable structure. 4. If staying at home, turn of all electrical appliances to avoid outages and shorts. 5. Have adequate rain gear to stay warm and dry in case you need to flee the area. 6. STAY INDOORS 7. Make sure you have some kind of radio, preferably battery operated, so that you can listen to weather reports.

Sources "National Weather Service" __NOOA__. 2010. 30 November 2010 

"How do Hurricanes Form?" __TrocialWeather.net__. 2010. 30 November 2010 

Williams, Jack "Understanding Coriolis Force" __USA Today.__ 2003. 1 December 2010. 

"Typhoon Nina (1975)" __Reference.com__ 5 December 2010 

Agarwal, Abishek. "Surviving a Typhoon -- 7 Vital Tips". __Ezine Articles__. 5 December 2010 