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Tornadoes
By Jordon and Hans
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What is a Tornado?
• A tornado is a violent whirlwind that destroys many objects in its path. It looks like a giant funnel cloud extending from a storm cloud.
• Sometimes tornadoes can throw cars hundreds of meters.
• Tornadoes can have wind speeds up to around 300 MPH.
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How a Tornado Forms.
• Most tornadoes come from thunderstorms.• When you’re in North America you need
warm, moist air from the Gulf of Mexico and cold, dry air from Canada. When these two air masses meet, they get instable in the atmosphere. Changes in the wind direction and an increase in the speed of wind creates an invisible horizontal swirling effect.
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Where
Tornadoes mostly happen in the middle states. Where it is mostly flat.
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When Tornadoes Happen
• Tornadoes can happen at any time of the day and any time of the year.
• In the Northern States tornado peak times are in the summer.
• In the Southern States tornado peak times are in March to May.
• Tornadoes can happen between 3 P.M. to 9 P.M.
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Safety Tips• Before a tornado make sure that your family
knows where to go just in case a tornado forms. Prepare a disaster supply kit for your car and home.
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Safety Tip Part 2
• During a tornado go to a basement. If you don’t have a basement go to the interior room with no windows. Get under a sturdy piece of furniture if you can.
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Safety Tip Part 3
• If you live in a home that is mobile get out and lie down in a ditch. Mobile homes don’t give enough protection.
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Video Link
• http://www.accuweather.com/video-on-demand.asp?video=1704062594
• Go to this link to find more about tornadoes.
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The Fujita Scale
• SCALE WIND
SPEED POSSIBLE DAMAGE
Enhanced, Operationa
l Fujita Scale
F0 40-72 mph Light damage: Branches broken off trees; minor roof damage
EFO65-85 mph
F1 73-112 mph
Moderate damage: Trees snapped; mobile home pushed
off foundations; roofs damaged
EF186-110
mph
F2 113-157 mph
Considerable damage: Mobile homes demolished; trees
uprooted; strong built homes unroofed
EF2111-135
mph
F3 158-206 mph
Severe damage: Trains overturned; cars lifted off the
ground; strong built homes have outside walls blown away
EF3136-165
mph
F4 207-260 mph
Devastating damage: Houses leveled leaving piles of debris; cars thrown 300 yards or more
in the air
EF4166-200
mph
F5 261-318 mph
Incredible damage: Strongly built homes completely blown
away; automobile-sized missiles generated
EF5over 200
mph
This scale measures wind speed and how big the tornado is and how much damage it does.
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Q1
• What does the Fujita Scale do?
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A1
• It measures wind speed and how big it is and how much damage it does.
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Q2
• Where do tornadoes form mainly?
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A2• They form mainly in Tornado Alley where it’s
flat.
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Q3
• What months do tornadoes mostly form in the southern states?
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A3
• They mostly form from March to May.
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Reflections
• This is Jordon and Hans. We would like to learn more about how tornadoes look in action. ( Do you know why? Because We haven’t seen one in real life.)