Hurricanes & Tropical Depressions by Annie Cloutier 2011 copyright
What do we need to make a hurricane ?
Most likely time of year to happen ? <ul><li>June – November  30: Atlantic Ocean, but most hurricanes form from late Augus...
Yes, just when school starts up
Cyclones  or a  Typhoon <ul><li>Cyclones </li></ul><ul><li>Spiral inwards </li></ul><ul><li>Typhoon  </li></ul><ul><li>Mik...
Depending on what your location is around the world… <ul><li>Hurricanes   happen in the North Atlantic, Northeast Pacific ...
Map of world severe weather
Force categories of hurricanes
Why do hurricanes move in the opposite direction of how the Coriolis Effect makes the atmosphere move  normally ? <ul><li>...
Dog tries to demonstrate  effect
Cyclone  Anticyclone <ul><li>Low pressure areas are called cyclones </li></ul><ul><li>Pressure pushes air inward </li></ul...
Low pressure  High pressure
Hurricane, typhoon, cyclones are all are LOW PRESSURE  systems <ul><li>The terms hurricane, typhoon and cyclone are  regio...
Doppler effect-  changes in the wave frequency that occurs in energy when that energy moves towards or away from an observer
The end
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Hurricanes & Tropical depressions 2011 cloutier

  1. 1. Hurricanes & Tropical Depressions by Annie Cloutier 2011 copyright
  2. 2. What do we need to make a hurricane ?
  3. 3. Most likely time of year to happen ? <ul><li>June – November 30: Atlantic Ocean, but most hurricanes form from late August to November </li></ul><ul><li>May – November : Pacific Ocean </li></ul>
  4. 4. Yes, just when school starts up
  5. 5. Cyclones or a Typhoon <ul><li>Cyclones </li></ul><ul><li>Spiral inwards </li></ul><ul><li>Typhoon </li></ul><ul><li>Mike in the Philippines </li></ul>
  6. 6. Depending on what your location is around the world… <ul><li>Hurricanes happen in the North Atlantic, Northeast Pacific Ocean east of the dateline or, South Pacific Ocean east of 160 * east longitude </li></ul><ul><li>Tropical cyclones happen in the Southwest Indian ocean </li></ul><ul><li>Typhoons happen in the Northwest Pacific Ocean west of the dateline </li></ul><ul><li>Severe tropical cyclones happen in the North Indian ocean </li></ul>
  7. 7. Map of world severe weather
  8. 8. Force categories of hurricanes
  9. 9. Why do hurricanes move in the opposite direction of how the Coriolis Effect makes the atmosphere move normally ? <ul><li>Imagine a record player spinning and you trying to jump on it. </li></ul><ul><li>What happens ? </li></ul><ul><li>You get spun around in the opposite direction to counter the force of right movement in the Northern Hemisphere: </li></ul><ul><li>the Southern Hemisphere the left movement or reverse direction </li></ul><ul><li>The extreme force of the winds give an equal and opposite reaction push in the opposite direction than the Coriolis direction. </li></ul>
  10. 10. Dog tries to demonstrate effect
  11. 11. Cyclone Anticyclone <ul><li>Low pressure areas are called cyclones </li></ul><ul><li>Pressure pushes air inward </li></ul><ul><li>The same deflection inward moving air in a low pressure cyclonic system causes a counterclockwise rotation </li></ul><ul><li>High pressure regions are called anticyclones </li></ul><ul><li>Pressure pushes air outward </li></ul><ul><li>In the Northern hemisphere, the rightward deflection of the outer moving air causes the high pressure anticyclone system to rotate in a clockwise direction </li></ul>
  12. 12. Low pressure High pressure
  13. 13. Hurricane, typhoon, cyclones are all are LOW PRESSURE systems <ul><li>The terms hurricane, typhoon and cyclone are regionally specific terms depending on the location on Earth where the storm occurs. </li></ul><ul><li>Deflection on an inward moving air mass in low pressure cyclonic systems causes a counterclockwise rotation </li></ul><ul><li>In the Northern hemisphere the rightward deflection of the outward moving air causes a high pressure anticyclonic weather system to rotate clockwise. </li></ul>
  14. 14. Doppler effect- changes in the wave frequency that occurs in energy when that energy moves towards or away from an observer
  15. 15. The end

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