In the Northern Hemisphere, through the months
of June to November, there is an increase of weather coverage on tropical cyclones. This period is referred to as Hurricane Season. A hurricane is a tropical cyclone that has
sustained winds over 74 miles per hour. Forming over warm tropical or subtropical
waters, a tropical cyclone is a rotating low pressure system with organized thunderstorms,
without any fronts associated with the storm. In order to form, tropical cyclones need warm
ocean water with a minimum temperature of 80 degrees fahrenheit roughly throughout a
depth of 150 feet. Fast cooling air with height, moist air near
the mid-level of the troposphere, around 16,000 feet, and pre-existing near-surface disturbances
help with the formation of these storms. Low values of vertical wind shear, or the
change in wind speed with height, is another important part in the formation of a tropical
cyclone. They rarely form within 5 degrees of the equator
due to a weak Coriolis Force, the force that contributes to the spin of the storm. In the Northern Hemisphere, these storms rotate
counter-clockwise. If a tropical cyclone has sustained surface
winds less than 39 mph they are called tropical depressions. If the sustained winds exceed 39 mph they
are called tropical storms. In the next few weeks, I’ll continue to
elaborate and explain the ins and outs of a tropical cyclone. Please like, follow, and subscribe on Facebook,
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