tropical cyclone science 8 quarter 2

2. The location of the Philippines makes it prone to
experience typhoons. The country is located just above
the equator, along the west Pacific Ocean, where it
receives enough heating from the sun, causing the
surrounding bodies of water to warm up. This leads to
the development of low-pressure areas which
eventually turns into tropical cyclones.

6. •When tropical cyclones stay/cross warm waters, it
intensifies as it is continuously supplied by rising
warm air and high humidity.
• Upon reaching landfall, it weakens as it faces cool
dry air and move over large land mass. The mountain
ranges and forest rich in trees increase the friction
encountered by tropical cyclones causing it to weaken
and block the moisture in the wind making the air
masses dry.

7. •Additionally, its strength lessens as it travels over
cooler sea surface temperature and move to regions
with high vertical wind shear. Generally, tropical
cyclones move in a westward direction along with the
prevailing wind systems. This often spares Central and
Southern Mindanao from typhoons but is still
susceptible to weather disturbances which may bring
more rain because of the surrounding bodies of water

8. •Usually move from East-West across the country,
heading North or West
•Monitored by PAGASA
(Philippine Atmospheric, Geophysical and
astronomical Service Administration)
•About 20 tropical cyclones enter the PAR each year

10. •Peak of the typhoon season is July-October, when
nearly 70% of all typhoon develop
•Philippines is the most exposed country in the world
•Tropical Cyclones entering the PAR are given local
names by the PAGASA which also raises public storm
warning signals
•PAGASA prepares 25 names in each set

12. •2 separate agencies that assign names to tropical
cyclones which can often result having 2 names
•The JMA (Japan Meteorological Agency) will name a
tropical cyclone based on its sustained wind speeds of
at least 65kph

13. • Typhoon Ketsana- Ondoy
(2009) 165 kph
• Tropical Storm Washi – Sendong
(2011)
• Super Typhoon Haiyan – Yolanda
(2013) 315 kph
killing more than 6,000 people, displacing 4.1
million people, 1,800 missing and 12,000 were injured

14. •PAGASA assign names to tropical depression in the
PAR located between 135° East -115° East and
between 5 ° North -25 ° North regardless of whether
or not a tropical cyclone
has already been given
a name by JMA

15. •Set of names or the bagyo or typhoon are taken after
the contest “Name a Bagyo Contest” conducted by
the PAGASA in 1998
•Retiring names if it caused at least ₽ 1 billion damage
or have at least 300 deaths within the Philippines and
names with negative associations with real persons

16. NDRRMC
National Disaster Risk Reduction and Management
Council
•Each province and local government in the Philippines has
a corresponding Disaster Risk Reduction and Management
Office (DRRMO)
•Preparation and response to typhoons
•Warning signals, guiding activities in the field of
communication, rescue, engineering, health, rehabilitation
and public education

17. EFFECTS OF TYPHOON

23. ASSESSMENT

24. • 1. What is the shape of the Philippine Area of
Responsibility (PAR)?
A. C.
B. D.

25. • 2. Which of the following correctly describes the
Philippine Area of Responsibiltiy?
A. All LPA within the PAR are called bagyo.
B. PAGASA does not monitor outside PAR.
C. Western boundary is much farther than the eastern.
D. Eastern boundary is much farther than the western.

26. •3. Which government agency monitors weather
disturbances?
A. Philippine Volcanology and Seismology
B. Philippine Institute of Volcanology and Seismology
C. Philippine Astronomic, Geophysical, and Atmospherical
Services Administration
D. Philippine Atmospheric, Geophysical, and Astronomical
Services Administration

27. •4. A weather forecaster reports that a typhoon will
enter the PAR at 6:00AM tomorrow. What does this
mean?
A. The typhoon will be closely monitored by PAGASA for
possible landfall.
B. The typhoon will become stronger at 6:00 AM
tomorrow.
C. The typhoon will become weaker at 6:00 AM
tomorrow.
D. It will reach landfall by 6:00AM tomorrow.

28. • 5. If you live in the Philippines, where should you stay
to avoid typhoons?
A. Luzon, it is not on the path of typhoons.
B. Visayas, it is at the middle.
C. Visayas, it has a lot of mountain ranges.
D. Mindanao, it is seldom affected by typhoons.

29. • 6. What does a typhoon need to sustain or increase
its intensity?
A. warm land
B. warm water
C. cold land
D. cold water

30. •7. What will happen to the strength of the typhoon as
it reaches land?
A. It will move slowly to cause more damage.
B. It will move faster to reach the warm water.
C. It will weaken due to the absence of warm water.
D. It will be stronger due to the absence of warm water

31. •8. How can forests filled with trees affect the
strength of typhoons?
A. Forests increases friction encountered by typhoons,
reducing its strength.
B. Forests increases friction encountered by typhoons,
increasing strength.
C. Forests decreases friction encountered by typhoons,
increasing strength.
D. Forests decreases friction encountered by
typhoons, decreasing strength.

32. •9.Which area will be greatly affected by a storm
surge?
A. hillside
B. shoreline
C. caves
D. city

33. •10.In what way can tropical cyclones be a benefit?
A. Replenishes dams
B. Increases air pollution
C. Causes the sea level to rise
D. Elevate water levels in rivers