HURRICANES
<ul><li>also called typhoons (Pacific),  </li></ul><ul><li>willi willis (Australia),  </li></ul><ul><li>tropical cyclones ...
hurricane formation <ul><li>form at 15 to 20 o  N or S of equator – not at equator (Coriolis too weak) </li></ul><ul><li>m...
tropical depressions coming off of Africa
hurricane formation <ul><li>Low pressure cell moves in </li></ul><ul><li>Air warmed by warm ocean </li></ul><ul><li>Water ...
hurricane formation <ul><li>Since low pressure, more air rises </li></ul><ul><li>As warm, moist air cools, it condenses an...
 
 
hurricane structure <ul><li>Doughnut shaped clouds with hole (eye) in middle </li></ul><ul><li>Can be few hundred miles di...
hurricane structure <ul><li>Northern hemisphere – spiral counter-clockwise </li></ul><ul><li>Southern hemisphere – spiral ...
 
<ul><li>tropical depression – winds < 38 mi/hr </li></ul><ul><li>tropical storm – winds between 39 and </li></ul><ul><li>7...
 
 
hurricane demise <ul><li>If upper level winds strong can sheer off top of hurricane causing it to break up </li></ul><ul><...
the power of hurricanes <ul><li>Release huge amounts of energy </li></ul><ul><ul><li>More than U.S. energy needs for 1 yea...
hurricane damage <ul><li>Wind damage </li></ul><ul><li>Rainfall = flooding </li></ul><ul><li>Storm surge – especially if h...
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Hurricanes powerpoint

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  • 👾😤😫😱😱😱😰😰😰😬😬😬😙😷😷😷😷😷😷😷😷😷😷😟😟😟😟😡😧🙎🏿😩 your dreams are super weird are you mental or nah?
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  • Last night I thought about a horse that had the head of a human. Not like a centaur, which has the torso of a human attached to the body of a horse, just a horse with a normal body, normal neck, only a human head. Anyway, that is my thought I wanted to share.
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Hurricanes powerpoint

  1. 1. HURRICANES
  2. 2. <ul><li>also called typhoons (Pacific), </li></ul><ul><li>willi willis (Australia), </li></ul><ul><li>tropical cyclones </li></ul>
  3. 3. hurricane formation <ul><li>form at 15 to 20 o N or S of equator – not at equator (Coriolis too weak) </li></ul><ul><li>must have warm water and humid air to form </li></ul><ul><li>low pressure </li></ul><ul><li>cells (tropical </li></ul><ul><li>depressions) </li></ul><ul><li>strengthen and </li></ul><ul><li>speed up </li></ul>
  4. 4. tropical depressions coming off of Africa
  5. 5. hurricane formation <ul><li>Low pressure cell moves in </li></ul><ul><li>Air warmed by warm ocean </li></ul><ul><li>Water evaporates </li></ul><ul><li>Warm air rises and spirals due to Coriolis effect </li></ul><ul><li>Forms column of warm air rising </li></ul>
  6. 6. hurricane formation <ul><li>Since low pressure, more air rises </li></ul><ul><li>As warm, moist air cools, it condenses and rains </li></ul><ul><li>Keeps strengthening as long as over warm water </li></ul>
  7. 9. hurricane structure <ul><li>Doughnut shaped clouds with hole (eye) in middle </li></ul><ul><li>Can be few hundred miles diameter, 9 miles high </li></ul><ul><li>Eye – up to 20 miles wide </li></ul><ul><ul><li>Calm </li></ul></ul><ul><ul><li>Warm air rises due to low pressure </li></ul></ul><ul><ul><li>Cold, dry air sinking – prevents rain </li></ul></ul><ul><li>Warm air exits top and spirals out due to Coriolis </li></ul>
  8. 10. hurricane structure <ul><li>Northern hemisphere – spiral counter-clockwise </li></ul><ul><li>Southern hemisphere – spiral clockwise </li></ul><ul><li>Blown across ocean by trade winds – affected by Coriolis, so move north or south – move 3 to 25 miles/hour </li></ul><ul><ul><li>In Atlantic move up coast from Carribean </li></ul></ul>
  9. 12. <ul><li>tropical depression – winds < 38 mi/hr </li></ul><ul><li>tropical storm – winds between 39 and </li></ul><ul><li>73 mi/hr </li></ul><ul><li>hurricane – winds > 74 mi/hr </li></ul>hurricane strength
  10. 15. hurricane demise <ul><li>If upper level winds strong can sheer off top of hurricane causing it to break up </li></ul><ul><li>If over cool water cannot maintain itself </li></ul><ul><li>If over land cannot maintain itself </li></ul><ul><li>Atlantic Hurricane season is June to November, but may occur other times </li></ul>
  11. 16. the power of hurricanes <ul><li>Release huge amounts of energy </li></ul><ul><ul><li>More than U.S. energy needs for 1 year </li></ul></ul><ul><li>Up to 20 billion metric tons of rainfall </li></ul><ul><ul><li>> I inch per hour </li></ul></ul><ul><li>Can be extremely damaging </li></ul>
  12. 17. hurricane damage <ul><li>Wind damage </li></ul><ul><li>Rainfall = flooding </li></ul><ul><li>Storm surge – especially if hits land at high tide </li></ul><ul><ul><li>Ex: Bangladesh 1970 had a 40 foot storm surge </li></ul></ul>

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