This document provides an overview of typhoons in the Philippines. It defines typhoons and describes their anatomy, formation process, and categories. It explains that hurricanes, typhoons, and cyclones are the same weather phenomenon but have different names depending on their geographical location. The document discusses key details about PAGASA, the agency responsible for weather monitoring and forecasting in the Philippines. It also provides facts about typhoon frequency in the Philippines and explains public storm warning signals.

1. UNDERSTANDING TYPHOONS

2. In this lesson,
We will be able to understand the Typhoon’s:
A. Definition
B. Anatomy
C. Formation
D. Categories
We will also find out:
A. Why Philippines is prone to typhoon?
B. How a typhoon dies?
C. What are the Public Storm Warning Signals in the Philippines?

3. Trivia Question: We hear weathercasters talk about
typhoons, hurricanes and cyclones – which of the
following is the true statement?
a. Typhoons are bigger than cyclones; cyclones are bigger than
hurricanes.
b. Hurricanes are stronger than typhoons and
cyclones.
c. Hurricanes, typhoons and cyclones occur in different
geographical areas.

4. The correct answer is C.
Typhoons, cyclones and hurricanes are the
same weather phenomenon – the difference is
the geographical area where they occur. They
are tropical cyclones with regionally specific
names.

5. PAG-ASA is the agency
responsible for assessing
and forecasting weather,
flood, and other
conditions essential to the
safety and welfare of the
people. It also conducts
research & development
projects related to
atmospheric and allied
data. It now serves as one
of the Scientific and
Technological Services
Institutes of the
Department of Science
and Technology.

6. Did You Know That
In 1963 by the Philippine Weather Bureau through the use of four sets
of alphabetically arranged Filipino women nicknames ending in “ng” that
are alternately used every four years. In 1999, the Philippine Atmospheric,
Geophysical and Astronomical Services (PAGASA) held a nationwide search
for new generation tropical cyclone names. It was dubbed as “Name the
Bagyo Contest.” The result of the search which was picked out from more
than 18,000 entries was 140 no- gender-bias names that will be used until
2016 by PAGASA.

7. Not so Fun Fact
According to the Philippine Atmospheric,
Geophysical, and Astronomical Services
Administration (PAGASA), about 20 tropical
cyclones enter the Philippine Area of
Responsibility each year.

8. What Is TYPHOON?

9. an intense circular storm
characterized by low atmospheric pressure,
heavy rain and high winds winds in a counter-
clockwise direction.
(counter-clockwise direction if northern hemisphere
and clockwise direction if southern hemisphere)

10. What are the parts of typhoon?
The main parts of a tropical cyclone are
the rainbands, the eye, and the eyewall.

12. How does a
typhoon
form?

13. A typhoon forms when
winds blow into areas of the
ocean where the water is
warm. These winds collect
moisture and rise, while
colder air moves in below.
This creates pressure, which
causes the winds to move
very quickly. ... In order for a
storm to be a typhoon, wind
speeds have to reach at least
74 miles per hour.

14. The Intertropical Convergence
Zone, or ITCZ, is the region that
circles the Earth, near the
equator, where the trade winds of
the Northern and Southern
Hemispheres come together. The
intense sun and warm water of
the equator heats the air in the
ITCZ, raising its humidity and
making it buoyant.
*Southwest monsoon winds and
Northeast monsoon winds

17. Philippine
Area of
Responsibility

18. Points Latitude, Longitude
A 5oN, 115oE
B 15oN, 115oE
C 21oN, 120oE
D 25oN, 120oE
E 25oN, 135oE
F 5oN, 135oE
Points of Philippine Area of Responsibility

19. A. If a typhoon is located at 15oN, 138oE, is it within
the PAR?
B. How about if the typhoon is at 19oN, 117oE, is it
inside the PAR?

21. Movement and Speed of Tropical Cyclone
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.
Landfall
is the event of a storm moving over land after being over water. More
broadly, and in relation to human travel, it refers to 'the first land that is
reached or seen at the end of a journey across the sea or through the air, or
the fact of arriving there.

23. 1. Where did the tropical cyclone form? On
land or in the ocean?
2. In what direction did the tropical
cyclones move?
3. Which part of the Philippines was hit by the
four tropical cyclones?

24. PUBLIC STORM
WARNING SIGNALS
in the Philippines