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1. Weather
Disturbances

2. Introduction
What is a weather disturbance?
• A weather disturbance is a
general term that describes any
pulse of energy moving through the
atmosphere.

3. • They are important in that they
can act as focusing mechanisms for
storm formation, or even to intensify
low pressure systems.
• They are typically mid or upper
atmospheric troughs of low pressure
that are embedded in the general
wind flow of the atmosphere.

4. Thunderstorm

5. What is a Thunderstorm?
• It is a small-scale weather system
in which lightning and thunder are
produced by a funnel-shaped
cumulonimbus cloud.
• It is also known as an electrical
storm, a lightning storm,
thundershower or simply storm.
• It usually produces gusty winds,
heavy rains, and sometimes hail.

6. • A thunderstorm occurs when the skies
darken, the wind picks up, lightning
flashes, thunder roars, and static is heard
on your AM Radio.
• May last for about 30 min. or even a hour.
• Plays an important role in the hydrologic
cycle and general circulation.
• Are also engines of tropical disturbance
that bring a large fraction of
the annual rainfall to tropical

7. Examples of Thunderstorms

8. More :D

9. Tropical
Cyclone

10. What is a Tropical Cyclone?
• A tropical cyclone is a generic term for a
storm with an organized system of
thunderstorms that are not based on a
frontal system.
• It is a low pressure system that generally
forms over tropical ocean areas, and
brings wind and thunderstorms.
• Comes from the Greek word “kyklos”,
which means “coiling snake.

11. • It rushes in a spiral motion and have a low
pressure center called “eye of the storm”.
• Tropical cyclones with maximum sustained
surface winds of less than 62 km/h are
called tropical depressions. When the winds
reach 62 km/h, it becomes a tropical storm.
Winds that reaches at least 118 km/h, then
they are called hurricanes in the Atlantic
and typhoons in the Pacific.
• Typhoons are strongest over the ocean
where they get their energy

12. Examples of Tropical
Cyclones

13. More :D

14. Moonsoon

15. What is a Monsoon?
• The term “monsoon” was from the
Arabic word “mausim” which means
“seasonal wind”.
• It is a seasonal flow of winds
between the Northern and Southern
Hemispheres.
• Monsoons are similar to Windflow.

16. • There are two monsoons system that
affect the areas such as “Monsoon Asia”
or in particular the Philippines and
Southeast Asia. These are the
Southwest Monsoon or “Habagat” and
the Northeast Monsoon or “Amihan”.
• Most summer monsoons produce copious
amounts of rain; winter monsoons
tend to cause drought.

17. The 2 Monsoon Systems
• Southwest Monsoon (Habagat)-
- felt during the months of June
and October.
• Northeast Monsoon (Amihan)
- experienced from
November to February.

18. Examples of Monsoons

19. More :D

20. Intertropical
Convergence
Zone

21. What is Intertropical
Convergence Zone?
• Intertropical Convergence Zone
(ITCZ) is the meeting place of hot
and cold tradewinds in the northern
and southern hemisphere.
• The weather system may trigger rain
showers, even flash floods in
affected areas.

22. • It is a belt of low pressure that lies
between the trade winds zone of the
northern and southern hemisphere. A
snake-like path and generally near the
equator
• Sailors usually called this doldrums,
where wind speed and direction are
weak and irregular.
• It is located 5°North and 5° South.

23. Example of ITCZ