Understanding typhoons
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Transcript of Understanding typhoons
UNDERSTANDING TYPHOONS
WHY IS THE PHILIPPINES PRONE TO TYPHOONS?
What conditions favor the formation of
typhoons?
Questions:
According to the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA), about 20 tropical cyclones
hit the PAR each year.
What is a typhoon?”
TROPICAL CYCLONE CATEGORIES
CATEGORY MAXIMUM WIND SPEEDKILOMETERS PER HOUR
(kph)
Tropical Depression
64 kph
Tropical Storm 118 kph
Typhoon 200
Supertyphoon Greater than 200
PLOTTING THE PHILIPPPINE RE OF RESPONSIBILITY (PAR)
Under what conditions do tropical cyclones form?
1. Where did the tropical cyclones
form? On land or in the ocean?
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.
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?
In what direction did the tropical cyclones move?
Where did they start? Where did they end?
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.
Strong ITCZ dominating the Western Pacific Ocean, showing the formation of three tropical cyclones as the Killer
Ondoy moves west.
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.
DEATH OF TYPHOON
Tracking a tropical cyclone
Where is air pressure very low?
Location A B C D Air pressure in millibars 930 960 980 990
Where is wind speed very high?
Location E F
Wind speed (km/hour) 10 200
ARE YOU PREPARED??