Hurricane Stats



A tropical depression is an organized system of clouds and thunderstorms with a defined surface circulation and maximum sustained winds of less than 38 mph.

A tropical storm is an organized system of strong thunderstorms with a defined surface circulation and maximum sustained winds between 39-73 mph.

category 1: 74-95 mph, 4-5 ft

Effects: Flooding and low damage to cars and building structures.

category 2: 96-110 mph, 6-8 ft

Effects: Damage to roofing and outside mobiles and plants. Flooding and some loss of power.

category 3: 111-130 mph, 9-12 ft

Effects: Structural damage to buildings and mobile homes. Flooding and debris in small homes and apartments.

category 4: 131-155 mph, 13-18 ft

Effects: Extensive damage to roofing and small houses. Erosion of beaches and flooding along coast and inland.

category 5: 155+ mph, 18 + ft

Effects: Complete destruction to buildings and homes. Evacuation of residence and major damage of beaches and stores near shoreline.



external image hurricane.jpg external image ophelia-09-16-2005-1315z.jpg
  • The image to the left, is a category 5 hurricane with a clearly developed eye.Due to the exceeding winds and warmer water being fed to the hurricane, the size of the hurricane can gain strength and become more dangerous.
  • The image the the right, is a category 1 hurricane with a struggling formation. Due to this, there are heavy thunderstorms and low winds eventually causing minor damages.



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Based upon the knowledge in this chart, the majority of hurricanes occur in the month of september in Charleston.

Naming Hurricanes:


Before 1953 hurricanes were named by the date that they occurred on.
From 1953 to 1979, they were named with only female names.
Since 1979, the National Weather Service began to use male names as well.
From 1979 to 1984 each set of hurricane names, one for the Atlantic coast and one for the East Pacific Coast, repeats a six-year cycle.
Names are arranged alphabetically with the exchanging of both male and female names.
Names are given to storms once they reach 65 kilometers per hour.

external image clovis_amo_2007002_lrg.jpg Tropical storm about to reach category one hurricane.


Over the past century, population has increased along with the creation of hurricanes. Deadly storms are one of the main causes for economic disaster. The collapsing of buildings, homes, and stores have cost numerous towns and cities billions of dollars.
With the increase of hurricanes reaching land, and the rise in gaining strength greater than 30 mph, flooding and power outages are now twice as likely to happen.

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*Extra help in textbook (pg 560-570)