Roger Robertson Samuel Olson

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Presentation transcript:

Roger Robertson Samuel Olson How Hurricanes Work Roger Robertson Samuel Olson

Overview Hurricane season June 1st – November 30th Also called cyclones or typhoons

Forming Forms in warm water Tropical Region Most Atlantic Hurricanes form off the west coast of Africa http://science.howstuffworks.com/hurricane2.htm

Parts of a Hurricane Eye - the low pressure, calm center of circulation Eye wall - area around the eye with the fastest, most violent winds Rain bands - bands of thunderstorms circulating outward from the eye that are part of the evaporation/condensation cycle that feeds the storm

Stages Tropical depression - swirling clouds and rain with wind speeds of less than 38 mph Tropical storm - wind speeds of 39 to 73 mph Hurricane - wind speeds greater than 74 mph

Category Wind Speed Effects 1 74 to 95 mph 2 96 to 110 mph 3 Storm surge 4 to 5 ft above normal Some flooding Little or no structural damage 2 96 to 110 mph Storm surge 6 to 8 ft above normal Trees down Roof damage (shingles ripped off) 3 111 to 130 mph Storm surge 9 to 12 ft above normal Structural damage in houses Mobile homes destroyed Severe flooding 4 131 to 154 mph Storm surge 13 to 18 ft above normal Severe flooding inland Some roofs ripped off Major structural damage 5 >155 mph Storm surge at least 18 ft above normal Severe flooding further inland Serious damage to most wooden structures

Weather Alerts Tropical-storm watch Tropical-storm warning Hurricane watch Hurricane warning