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Form over warm, tropical ocean
waters.
Sometimes called typhoons (Asia)
Formed when air flows over warm
water (over 80 ...
 Forms slowly over
days
 10-20 mile wide eye
 Can be up to 500
miles wide
 Classified by wind
speed in the Saffir-
Sim...
 In 1992, Hurricane
Andrew, a
category 5
hurricane made
landfall in Florida.
 At the time, it was
the most costliest
hur...
 Hurricane Katrina was
one of the most
deadliest and
devastating hurricanes
in recorded history.
 It was responsible for...
 Powerful funnel-shaped columns of spiraling
air.
 Warm air and cool air colliding create them
 Winds up to 300 mph.
 ...
F1 Tornado
F2 Tornado
F3 Tornado F4 Tornado
F5 Tornado
 On May 22, 2011 a
catastrophic, multi-
vortex F5 tornado hit
the town of
Joplin, Missouri.
 It killed 158 people and
ca...
 Before
 After
Blizzard - Heavy snowstorm w/
winds of more than 35 mph
creating reduced visibility.
Floods - Water spreads out over
nor...
 In 1993, a massive storm hit the
United States.
 Known as the “White
Hurricane”, this storm not only
caused a blizzard,...
 In 1993 a great flood
occurred in the Mississippi
River basin.
 The flood was among the
most costly and
devastating to ...
 Drought is an extended
period of time when a region
has a deficiency in its water
supply whether surface or
underground ...
 The Great Plains
(150,000 square mile
region) was ravaged by
drought.
 Thousands of families
were forced to flee and
fi...
 In 2011, Texas was hit hard by
drought.
 The drought dried up areas so much
that in one town, it revealed some
old hist...
Extreme weather
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Extreme weather

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Hurricanes, Tornadoes, Blizzards, Floods and Droughts

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Transcript of "Extreme weather"

  1. 1. Form over warm, tropical ocean waters. Sometimes called typhoons (Asia) Formed when air flows over warm water (over 80 degrees), picking up large amounts of moisture and energy. This flows into a low pressure core & tightens to form the “eye” or center. The more heat energy there is, the stronger the winds become.
  2. 2.  Forms slowly over days  10-20 mile wide eye  Can be up to 500 miles wide  Classified by wind speed in the Saffir- Simpson scale; category 1-5  Winds from 75-200 mph  Winds move counter- clockwise (northern hemisphere)  Most storms start off the coast of Africa and move west (Cape Verde storms)  Damage includes flooding, wind damage, & storm surge.
  3. 3.  In 1992, Hurricane Andrew, a category 5 hurricane made landfall in Florida.  At the time, it was the most costliest hurricane in history, causing over $26 billion in damages.
  4. 4.  Hurricane Katrina was one of the most deadliest and devastating hurricanes in recorded history.  It was responsible for 1,800 deaths and over $81 billion in damages, making it the costliest natural disaster in U.S. history.
  5. 5.  Powerful funnel-shaped columns of spiraling air.  Warm air and cool air colliding create them  Winds up to 300 mph.  Measured on the Fujita Scale; 0-6.  Generally they have small diameters (300 ft.) and travel short distances (1 mile)  3 out of 4 tornadoes in the world occur in the U.S. (around 700 per year)
  6. 6. F1 Tornado F2 Tornado F3 Tornado F4 Tornado
  7. 7. F5 Tornado
  8. 8.  On May 22, 2011 a catastrophic, multi- vortex F5 tornado hit the town of Joplin, Missouri.  It killed 158 people and caused nearly $3 billion in damages making it the deadliest and costliest tornado in American history.
  9. 9.  Before  After
  10. 10. Blizzard - Heavy snowstorm w/ winds of more than 35 mph creating reduced visibility. Floods - Water spreads out over normally dry land Droughts – A long period of time w/o rain or minimal rainfall.  - Droughts result in crop failures, reduced levels of water in storage.
  11. 11.  In 1993, a massive storm hit the United States.  Known as the “White Hurricane”, this storm not only caused a blizzard, but heavy winds, rains and tornadoes.  Many states received several feet of snow. Tennessee got the worst with over 5 ft. of snow in some areas!  In total, more than 300 people died as a result of this storm.
  12. 12.  In 1993 a great flood occurred in the Mississippi River basin.  The flood was among the most costly and devastating to ever occur in the United States, with $15 billion in damages and effecting over 30,000 square miles.  The floods claimed near 50 lives. LANDSAT views of the Mississippi, Missouri and Illinois Rivers.
  13. 13.  Drought is an extended period of time when a region has a deficiency in its water supply whether surface or underground water.  A drought can last for months or years.  It can cause significant damage[and harm on the ecosystem, agriculture o f the affected region as well as damage to the economy.
  14. 14.  The Great Plains (150,000 square mile region) was ravaged by drought.  Thousands of families were forced to flee and find work elsewhere.  Major contributor of the economic disaster known as the Great Depression that took over 10 years to recover from.
  15. 15.  In 2011, Texas was hit hard by drought.  The drought dried up areas so much that in one town, it revealed some old history.  The city of Bluffton, Texas was purposefully flooded more 50 years ago to create Lake Buchanan.  Many parts of town were submerged under the 20-30 feet under the lake, that is, until the drought.  Since the drought, receding lakes have been revealing the foundations of buildings, streets and eerily, old gravesites…
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