How Hurricanes Form

    • Publish Date: Sep 12 2017 1:11PM
    • |
    • Updated Date: Sep 12 2017 5:13PM
How Hurricanes Form

Even as Hurricane Harvey left Texas bruised and Hurricane Irma began lashing Florida, NASA scientists have explained how hurricanes form. Read on...

What are hurricanes?

Hurricanes are part of a family of storms called tropical cyclones — storms that rotate rapidly around a low-pressure centre and produce heavy rain and strong winds. If one of these storms hits a sustained top wind speed of 119 kilometres an hour and appears in the Atlantic or eastern North Pacific, it qualifies as a hurricane. 

How do hurricanes form?
Hurricanes begin as atmospheric disturbances over the tropical waters in west of Africa near the Cape Verde islands. Typically, when sea-surface temperatures are above 26.5 C, water vapour from the ocean condenses and releases heat, which rises and generates an inward movement of air. The air begins to spiral toward the centre of the disturbance, which graduates to a tropical depression and then a tropical storm. As long as winds in the upper atmosphere do not produce a shear force to disrupt the system, it can increase in height and breadth until it reaches hurricane status, gaining strength as it moves westward toward the Caribbean and picking up energy from the warm Atlantic waters.

How do they cause damage?
Hurricanes can cause damage in one of three main ways: wind, rain and storm surge. Because they produce eye-popping wind-speed figures, and are most often measured that way, whipping winds are perhaps the most common risk associated with hurricanes. 

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Comments

Amogha M Koulapure STJ PU COLLEGE

Hurricanes are the most violent storms on Earth. People call these storms by other names, such as typhoons or cyclones, depending on where they occur. The scientific term for all these storms is tropical cyclone. Only tropical cyclones that form over the Atlantic Ocean or eastern Pacific Ocean are called "hurricanes." Whatever they are called, tropical cyclones all form the same way. World map showing area where cyclones occur.

Shweta Ullala National Academy For Learning

Interesting! Recently around 2 hurricanes have hit the US coastlines!

Roma Ramcoumar Bethel Mat Hr Sec School

Lovely information !!!! prayers for Caribbeans .......

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