By:
Klaus Austin Fuentes
Jan Michael G. Gaite
WEATHER DISTURBANCE
TYPES OF WEATHER
DIS T U RBANCES
 Typhoon/Hurricane
 Tropical Cyclones
 Tornado
Typhoon/Hurricane
-
A large heat engine,
where great amounts
of heat are being
produced from the
process of latent heat
of condensation.
-
occurs as water vapor is being
evaporated from the ocean
surface and condensed into
cloud droplets.
Typhoon/Hurricane
-
Both are names of tropical
storms and most of their
characteristics are the same.
They have wind speeds that are
more than 74 mph, and are
accompanied by hail, strong
winds, storm surges and rain.
-
Firstly, tropical storms are
classified by the region in which
they originate.
Hurricane versus Typhoons

Hurricane comes
from the word
Huracan which
means ‘big wind’.
It was originally a
term used by the
Native Americans
for storms that
originated in the
West Atlantic.

Typhoon is
derived from the
Chinese Tai Fun
which means
‘great wind’ and
referred to winds
that developed in
the North Pacific
Hurricane versus Typhoons


Hurricane develops in
the Western Atlantic
Ocean where the water
temperature is colder.
Hurricanes develop in
the Western Atlantic
Ocean during summer.


Typhoons develop in the
Pacific Ocean where the
water is warmer.
Tropical storm develops
where the water is warm
and the place is humid.
That is why it is said
that typhoons are
stronger than
hurricanes.
Hurricane versus Typhoons



Hurricanes damage
more land areas than
Typhoons, which cause
damage to countries’
coastlines.
Hurricanes occur during
October in the Western
Atlantic Ocean (cold
region)
Hurricanes move both
clockwise and counter
clockwise



Typhoons are said to be
stronger than Hurricanes
because it develops
where water is warm.
Typhoons appear during
the months of July to
November in the
Northern Pacific Ocean
(warm and humid
region).
Typhoons move
clockwise
Causes of typhoon/hurricane:






Pre-existing disturbance
Warm ocean water
Low atmospheric stability
Sufficient Coriolis force
Low vertical wind shear
Upper atmosphere divergence
* Coriolis force - an apparent force that as a result
of the earth’s rotation deflects moving objects to
the right in the northern hemisphere and to the
left in the southern hemisphere.
Tropical Cyclones
- a storm
system characterized
by a lowpressure center and
numerous thundersto
rms that produce
strong winds and
heavy rain.
Causes of tropical cyclones:
Water temperatures of at least 26.5
°C (79.7 °F)
 Rapid cooling with height
 High humidity
 Low amounts of wind shear
 A need to form more than 555 km
(345 mi) or 5 degrees of latitude away
from the equator
 pre-existing system of disturbed weather

Tornado
- rotating columns of
air usually produced
by severe
thunderstorms.
Multi vortex tornadoes – mini tornadoes
circulating around a larger one.
WATERSPOUT
- tornadoes form
over water.
LANDSPOUT
- tornadoes form
over land.
How tornadoes are formed?
- most tornadoes actually form from
the ground up. It is simply highly
saturated air dropping from the
thunderstorm which gives the
appearance of a tornado “touching
down”.
How fast do tornadoes
move?
- a tornado on average moves at speeds
of 30mph, but can range stationary to
about 70mph.
Tornado versus Cylone



Land encourages the
development of a tornado,
while it destroys the
cyclone’s formation.
The time frame from the
birth of a tornado until it
dies out, is generally
measured in minutes



Tornado damage is intense
and targeted


The tornado cannot
encourage the development
of the cyclone.
Cyclones develop and fester
over the oceans.
The cyclone has a longer life
span. The time frame from the
birth to the death of a cyclone,
is measured in hours and
days.
Cyclone damage is
widespread, and the exposure
to the elements is longer.
The cyclone can encourage the
development of the tornado
once landfall is achieved.
References:
http://www.pagasa.dost.gov.ph/
 http://www.weather.unisys.com/
 http://www.differencebetween.net/s
cience/nature/difference-betweenhurricane-and-typhoon/
