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Transcript of Hurricane Presentation
Hurricanes and Typhoons are both Tropical Cyclones but Hurricanes form in the North Atlantic Ocean, the NE Pacific Ocean east of the International Date Line, or the South Pacific Ocean east of 160E, While Typhoons form in the Northwest Pacific Ocean west of the International Date Line.
Tornadoes and Cyclones both rotate clockwise in the southern hemisphere and counterclockwise in the northern hemisphere.
Cyclones, Typhoons, and Hurricanes are measured with the Saffir-Simpson scale, while Tornadoes are measured by the Fujita (F), Enhanced Fujita (EF), and TORRO (T) Scale.
The frequency of Hurricanes and Cyclones is 10-15 per year, 25-30 per year for Typhoon, and, just counting America, the frequency for Tornadoes is around 1200 per year.
Tornadoes have been spotted in all continents except Antarctica.
The diameter of Hurricanes is measured in hundreds of kilometers while Tornadoes are measured in hundreds of meters.
Typhoons, Cyclones, and Hurricanes are identified with the characteristics of heavy winds, floods, storm surge, a lot of rain and tornadoes. Tornadoes are identified with the characteristics of very strong cyclonic winds, very heavy rain, large hail, and strong cloud to ground lightning.
Hurricane Warnings can come within days to weeks while Tornado warnings come within minutes to hours. & Barometric Pressure: The atmospheric pressure as indicated by a barometer. What Does This have to do with Hurricanes? Barometric Pressure helps us predict how strong a Hurricane will be. Hurricane Rotation: Clockwise in the southern hemisphere and counterclockwise in the northern hemisphere Stages of Hurricane Development 1) Tropical Depression: Designated when the first appearance of a lowered pressure and organized circulation in the center of the thunderstorm complex occurs. They have a wind speed range of 23 - 39 mph. Tropical depressions appear to have little organization with a slight amount of rotation. They lack the round appearance of Hurricanes and instead look like several thunderstorms grouped together.
2) Tropical Storm: Once a Depression manages maximum sustained winds of 39-73 mph, showers and thunderstorms move over closed circulation, it becomes more organized and takes on a circular shape it is considered a Tropical Storm.
3). Hurricane: A tropical storm becomes a hurricane when sustained wind speeds reach74 mph. A pronounced rotation develops around the eye. Surrounding the eye is the region of most intense winds and rainfall called the eye wall. Under the right atmospheric conditions, hurricanes can sustain themselves for as long as a couple of weeks but quickly die out once they make landfall or encounter cooler waters. Categorized 1-5 by the Saffir-Simpson Scale. Path: Hurricane Agnes began over the Yucatan Peninsula of Mexico, drifted east toward Cuba and then north through the Gulf of Mexico to Florida, Georgia, the Carolinas, moved eastward into the Atlantic, then westward to make landfall in New York where it finally died out. Category 1 Hurricane Storm Surge of 10 ft Categories each time it Hit Land: Tropical Depression Tropical Storm Damage Florida: 96 dwellings were destroyed, while about 1,802 suffered damage to some degree. The destruction of 177 mobile homes was reported and 374 others were significantly damaged. 988 small businesses in the state were either destroyed or had major damage, 40 airplanes were destroyed as well as one fishing camp.
Alabama: Several Streets flooded.
South Carolina: pastures, small grains, and soy bean crops near Cheraw suffered major damage and several basements, streets, and water systems were flooded.
Virginia: Severe damage occurred to sewer and water faculties 95 houses were destroyed and 4,393 others were damaged, while 125 mobile homes were destroyed and another were significantly affected. Additionally, 205 small businesses were either damage or destroyed .
Pennsylvania: more than 68,000 homes and 3,000 businesses were destroyed.
Death Tolls by Area
North Carolina 2
New Jersey 1
New York 24