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Hurricane Ida strikes U.S.

  • Integrity Education, Delhi
  • 30, Aug 2021
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Extremely dangerous Category 4 Hurricane Ida makes landfall near Port Fourchon, Louisiana.

About Hurricane

  • A hurricane is a type of storm called a tropical cyclone, which forms over tropical or subtropical waters.
  • A tropical cyclone is a rotating low-pressure weather system that has organized thunderstorms but no fronts (a boundary separating two air masses of different densities).
  • Tropical cyclones with maximum sustained surface winds of less than 39 miles per hour (mph) are called tropical depressions.
  • Those with maximum sustained winds of 39 mph or higher are called tropical storms.
  • When a storm's maximum sustained winds reach 74 mph, it is called a hurricane.
  • Hurricanes originate in the Atlantic basin, which includes the Atlantic Ocean, Caribbean Sea, and Gulf of Mexico, the eastern North Pacific Ocean, and, less frequently, the central North Pacific Ocean. 
  • "Hurricane Season" begins on June 1 and ends on November 30, although hurricanes can, and have, occurred outside of this time frame

How Hurricane is measured ?

  • The Saffir-Simpson Hurricane Wind Scale is a 1 to 5 categorization based on the hurricane's intensity at the indicated time. 
  • The scale – originally developed by wind engineer Herb Saffir and meteorologist Bob Simpson
  • This scale does not take into account other potentially deadly hazards such as storm surge, rainfall flooding, and tornadoes.

The wind categories are:

  • Tropical storm: 39 to 73 mph
  • Category 1 hurricane: 74 to 95 mph
  • Category 2 hurricane: 96 to 110 mph
  • Category 3 hurricane (major hurricane): 111 to 129 mph
  • Category 4 hurricane: 130-156 mph
  • Category 5 hurricane: 157 mph and higher