TODAY’S VOCABULARY HURRICANE: Tropical storm with wind speeds in excess of 74 mph.

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Presentation transcript:

TODAY’S VOCABULARY HURRICANE: Tropical storm with wind speeds in excess of 74 mph.

METEOROLOGY UNIT Violent Weather - Hurricanes

VIOLENT WEATHER….. videos/hurricanes videos/hurricanes videos/tornadoes videos/tornadoes videos/lightning videos/lightning

PARTS OF A HURRICANE Start off as a tropical storm off coast of Africa Named when winds >39 mph Hurricane when winds >74 mph

PARTS OF A TORNADO Funnel Cloud Center part sometimes called the ‘vortex’ Drops out of supercell thunderstorms

CLASSIFTYING HURRICANES Saffir Simpson Scale Category 1: Winds of knots (74-95 mph) Very dangerous winds will produce some damage Category 2: Winds of knots ( mph) Extremely dangerous winds will cause extensive damage Category 3: Winds of knots ( mph) Devastating damage will occur Category 4: Winds of 114 to 135 knots ( mph) Catastrophic damage will occur Category 5: Winds above 135 knots (157 mph) Catastrophic damage will occur

CLASSIFYING TORNADOES FUJITA SCALE F mph, Light damage, chimney damage, tree branches broken F mph, Moderate damage, mobile homes pushed off foundation or flipped over F mph, Considerable damage, mobile homes demolished, trees uprooted F mph, Severe damage, roofs and walls torn down, trains overturned, cars thrown around F mph, Devastating damage, well-constructed walls leveled F mph, Violent damage, homes lifted off foundation and carried considerable distances, autos thrown as far as 100 meters.

TORNADOES Small Forms over land Spring Lasts a few minutes Highest wind speeds – 300 mph ? Dies out F0 – F5 Damage from wind, hail HURRICANES Large Forms over tropical waters Late summer/fall Can last days Highest wind speeds mph Dies out over land / cold water Category 1-5 Damage from wind, water (storm surge), can spawn tornadoes

More facts….. TORNADO Forms from supercell thunderstorms The greater the difference in air pressure between high and low and pressure air masses, the more likely a tornado will result Center is low pressure Circulate counter clockwise HURRICANE Ocean warmer than 26 o C Low pressure in center great enough, storm starts to spin into the center Circulate counter clockwise Dissipate over land and/or cold water

TODAY’S ACTIVITY TRACKING HURRICANES

TICKET OUT THE DOOR Hurricanes that hit the Southeast United States start …………………

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