This powerpoint presentation is all about weather disturbances. Here, we tackle thunderstorms, tropical cyclones, monsoons, ant the Intertropical Convergence Zone. I hope this will help you so much. Please comment about your ideas and... anything. Thank you for Viewing and Enjoy!!!

1. WeatherWeather
DisturbancesDisturbances

2. IntroductionIntroduction
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. ThunderstormThunderstorm

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

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

7. Examples ofExamples of
ThunderstormsThunderstorms

8. More :DMore :D

9. TropicalTropical
CycloneCyclone

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

11. • It rushes in a spiral motion and have a lowIt rushes in a spiral motion and have a low
pressure center called “eye of the storm”.pressure center called “eye of the storm”.
• Tropical cyclones with maximum sustainedTropical cyclones with maximum sustained
surface winds of less than 62 km/h are calledsurface winds of less than 62 km/h are called
tropical depressions.tropical depressions. When the winds reach 62When the winds reach 62
km/h, it becomes akm/h, it becomes a tropical storm.tropical storm. Winds thatWinds that
reaches at least 118 km/h, then they are calledreaches at least 118 km/h, then they are called
hurricaneshurricanes in the Atlantic andin the Atlantic and typhoonstyphoons in thein the
Pacific.Pacific.
• Typhoons are strongest over the oceanTyphoons are strongest over the ocean
where they get their energywhere they get their energy
and weakest in the land.and weakest in the land.

12. Examples of TropicalExamples of Tropical
CyclonesCyclones

13. More :DMore :D

14. MoonsoonMoonsoon

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

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

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

18. Examples of MonsoonsExamples of Monsoons

19. More :DMore :D

20. IntertropicalIntertropical
ConvergenceConvergence
ZoneZone

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

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

23. Example of ITCZExample of ITCZ

24. Thank You!!!!
By:
Marigold F. So
(Luna Nightmare)