understanding typhoons
TRANSCRIPT
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UNDERSTANDING TYPHOONS
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WHY IS THE PHILIPPINES PRONE TO TYPHOONS?
What conditions favor the formation of
typhoons?
Questions:
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According to the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA), about 20 tropical cyclones
hit the PAR each year.
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What is a typhoon?”
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TROPICAL CYCLONE CATEGORIES
CATEGORY MAXIMUM WIND SPEEDKILOMETERS PER HOUR
(kph)
Tropical Depression
64 kph
Tropical Storm 118 kph
Typhoon 200
Supertyphoon Greater than 200
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PLOTTING THE PHILIPPPINE RE OF RESPONSIBILITY (PAR)
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Under what conditions do tropical cyclones form?
1. Where did the tropical cyclones
form? On land or in the ocean?
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The warm ocean water
heats up the air above it. The warm air then
rises. The rising water results in a low pressure area. Air in the surroundings
will then move toward the area.
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What can you say about the temperature of the bodies of water in
the vicinity of the Philippines?
Warm or cold?
How does it affect
the formation
of cyclones?
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In what direction did the tropical cyclones move?
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Where did they start? Where did they end?
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Position of the ITCZ in Summer & Winter Seasons, following the direct rays of the Sun. Tropical Cyclone development in
the Philippines peaks during July-August on where the ITCZ is located, while TC development over Northern Australia tends to peak around January-February when the ITCZ is over that
area.
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Strong ITCZ dominating the Western Pacific Ocean, showing the formation of three tropical cyclones as the Killer
Ondoy moves west.
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Movement & Speed Of Tropical Cyclones
Over the Philippine Sea, Tropical Cyclones tend to move on a general west-
northwest (WNW) direction with an average speed of
19-20 km/hr.
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DEATH OF TYPHOON
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Tracking a tropical cyclone
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Where is air pressure very low?
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Location A B C D Air pressure in millibars 930 960 980 990
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Where is wind speed very high?
Location E F
Wind speed (km/hour) 10 200
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ARE YOU PREPARED??
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