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Tornadoes

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Large trees snapped, mobile homes demolished. Tornado Categories. F0. Rank. Winds. Damage ... Large trees snapped, mobile homes demolished. F3. 158 - 206 mph. Severe ... – PowerPoint PPT presentation

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Title: Tornadoes


1
Tornadoes
2
What Is a Tornado?
  • Comes from powerful thunderstorms
  • Appears as rotating, funnel-shaped cloud
  • Winds reach up to 300 miles per hour
  • One of natures most violent storms

3
Other Names for Tornadoes
  • Tornadoes are also called
  • Twisters
  • Cyclones
  • Whirlwinds
  • The word tornado comes from two Spanish words
  • Tronado means thunderstorm
  • Tornar means to turn

4
How Doesa Tornado Form?
  • Scientists are not exactly sure
  • They form when warm, moist air meets cold, dry
    air
  • Updrafts develop into massive rotating clouds
    called supercells

5
Tornado Alley
States with the Highest Risk of Tornadoes
  • Arkansas
  • Iowa
  • Kansas
  • Louisiana
  • Minnesota
  • Nebraska
  • North Dakota
  • Ohio
  • Oklahoma
  • South Dakota
  • Texas

6
Tornado Categories
Rank
Winds
Damage
Example
40 72 mph
Broken tree branches, sign boards damaged
  • F0

Light
7
Tornado Categories
Rank
Winds
Damage
Example
40 72 mph
Broken tree branches, sign boards damaged
  • F0

Light
73 - 112 mph
Surface of roofs peeled off, cars pushed off the
road
F1
Moderate
8
Tornado Categories
Rank
Winds
Damage
Example
40 72 mph
Broken tree branches, sign boards damaged
  • F0

Light
73 - 112 mph
Surface of roofs peeled off, cars pushed off the
road
F1
Moderate
113 - 157 mph
Large trees snapped, mobile homes demolished
F2
Considerable
9
Tornado Categories
Rank
Winds
Damage
Example
40 72 mph
Broken tree branches, sign boards damaged
  • F0

Light
73 - 112 mph
Surface of roofs peeled off, cars pushed off the
road
F1
Moderate
113 - 157 mph
Large trees snapped, mobile homes demolished
F2
Considerable
158 - 206 mph
Trains overturned, heavy cars lifted off the
ground
F3
Severe
10
Tornado Categories
Rank
Winds
Damage
Example
40 72 mph
Broken tree branches, sign boards damaged
  • F0

Light
73 - 112 mph
Surface of roofs peeled off, cars pushed off the
road
F1
Moderate
113 - 157 mph
Large trees snapped, mobile homes demolished
F2
Considerable
158 - 206 mph
Trains overturned, heavy cars lifted off the
ground
F3
Severe
207 - 260 mph
Houses leveled, cars thrown about
F4
Devastating
11
Tornado Categories
Rank
Winds
Damage
Example
40 72 mph
Broken tree branches, sign boards damaged
  • F0

Light
73 - 112 mph
Surface of roofs peeled off, cars pushed off the
road
F1
Moderate
113 - 157 mph
Large trees snapped, mobile homes demolished
F2
Considerable
158 - 206 mph
Trains overturned, heavy cars lifted off the
ground
F3
Severe
207 - 260 mph
Houses leveled, cars thrown about
F4
Devastating
261 - 318 mph
Houses carried far distances, trees debarked
F5
Incredible
12
Difference between aWatch and a Warning
A Watch
A Warning
  • Tornadoes are possible in your area
  • A tornado has been seen in your area

13
What ShouldI Do?
  • Tornadoes are hard to predict
  • You may only have a few minutes warning
  • Take cover immediately
  • In a room without windows
  • A basement or bathroom or usually best
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