Download Weather Disturbances

WEATHER DISTURBANCES
HURRICANE, TROPICAL CYCLONE, TYPHOON,
TORNADO, CYCLONE, STORM
What is a weather disturbance?
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A weather disturbance is a general term that
describes any pulse of energy moving through the
atmosphere. 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.
3. Cyclone
1. Tropical Cyclone
Summary
2. Tornado
4. Storm
Tropical Cyclone/Hurricane/Typhoon
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An Intense circular storm that originates over warm
tropical oceans and is characterized by low
atmospheric pressure, high winds and heavy rains.
A Tropical Cyclone draws energy from the sea
surface and maintaining its strength as long as it
remains over warm water.
A Tropical Cyclone is accompanied by torrential
rains.
How does a typhoon form?
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A typhoon is formed when intense heat from the sun
warms large bodies of water such as seas and
oceans. This heat causes the water from the body of
water to evaporate and create a low pressure
area. As warm air rises, it is replaced by cold air
from the surrounding high pressure area creating a
swirling mass of water vapor. With enough moisture
from the sea or ocean below, a typhoon will be
formed.
Tornado
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Tornado is a small-diameter column of violently
rotating air developed within a convective cloud
and in contact with the ground.
Tornadoes that hit a populated area causes
fantastic destruction and great loss of life, mainly
from flying debris and collapsing structures.
This strong winds occur in all continents except
Antarctica.
Cyclone
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Cyclone is any large system of winds that circulates
about a centre of low atmospheric pressure in a
counter clockwise direction north of the Equator and
in a clockwise direction to the south.
This winds are generally associated with rain or
snow.
If there are two cyclones that are near and
interacting with each other, they cause the Fujiwhara
Effect.
Storm
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Violent atmospheric disturbance, characterized by
low barometric pressure, cloud cover, precipitation,
strong winds, and possibly lightning and thunder.
In meteorology, storm is restricted to a cyclone with
a strong low pressure center, strong winds,
accompanied by heavy precipitation, lightning and
thunder.
This generally forms from Low-Pressure Area (LPA)
Summary
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Weather disturbance is a pulse of energy moving
through the atmosphere. They are embedded in the
general wind flow of the atmosphere.
Tropical Cyclone is an intense circular storm that
originates over warm tropical oceans and is
characterized by low atmospheric pressure, high
winds and heavy rains.
Tornado is a small-diameter column of violent air
within a convective cloud in contact with the ground.
Summary(cont.)
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Cyclone is a general term for any large system of
winds that circulates about a center of low
atmospheric pressure accompanied by rain or snow.
Storm is a violent atmospheric disturbance,
characterized by low barometric pressure, cloud
cover, precipitation, strong winds, and possibly
lightning and thunder.
Storm generally forms from LPA
CATEGORY
MAXIMUM WINDS
Tropical depression
Between 35 kph and 64
kph near the center
Tropical Storm
Between 65 kph and 118
kph near the center
Typhoon
119-200nkph near the
center
Super Typhoon
Maximum winds greater
than 200 kph
End
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