Tropical Storms - PowerPoint PPT Presentation

1 / 6
About This Presentation
Title:

Tropical Storms

Description:

Tropical Storms Other Names Otherwise known as hurricanes, cyclones, typhoons, and wily willies (the Australian name!). These are very intense areas of very low ... – PowerPoint PPT presentation

Number of Views:122
Avg rating:3.0/5.0
Slides: 7
Provided by: Dell7258
Category:

less

Transcript and Presenter's Notes

Title: Tropical Storms


1
Tropical Storms
2
Other Names
  • Otherwise known as hurricanes, cyclones,
    typhoons, and wily willies (the Australian
    name!).
  • These are very intense areas of very low
    pressure, approximately 500 to 1000 kilometres in
    diameter.
  • Tropical storms form over water that is above
    26.5C in temperature.
  • The warm water heats the air above it, causing it
    to rise rapidly.
  • Cooler air from elsewhere rapidly moves in to
    replace the rising air and the process starts
    again.

3
How Do They Occur?
  • The rapidly rising moist air, cools as it ascends
    and forms tall cumulo-nimbus clouds.
  • These slowly spin around the central point.
  • Jet streams above the storm clouds continue to
    suck the air up.
  • Cooling air sinks down through the spiralling
    mass of clouds to produce a central eye of the
    storm.
  • Tropical storms move quickly over water, as long
    as it is warms enough to keep the storm
    energised.
  • Once over land, where there is less moisture and
    the surface is cooler, tropical storms quickly
    calm down.

4
(No Transcript)
5
Formation
  • As the storm approached there would be a drop in
    temperature and pressure.
  • Wind speeds would begin to increase and clouds
    would form.
  • As the storm is overhead the pressure would fall
    rapidly, as would the temperature.
  • Wind speeds would be in excess of 150km/hr and
    the rain would be torrential.
  • The wind would whip up waves that could swamp
    entire coastal areas, or drown entire coral
    islands in the Pacific.

6
Formation
  • The eye of the storm is overhead.
  • Skies are clear, the temperature and pressure
    increase, and the wind dies down.
  • Unfortunately this is only a brief lull in the
    storm.
  • The storm hits again.
  • Temperature and pressure falls.
  • Torrential rain and wind speeds of over 100km/hr
    occur.
  • The winds are now coming form the opposite
    direction than they were before.
  • After the storm the temperature and pressure rise
    again.
  • The rain becomes showers, and the winds die down.
  • The clean up operation begins!
Write a Comment
User Comments (0)
About PowerShow.com