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.
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)
WEATHER DISTURBANCES
Tropical Cyclone – the most destructive weather disturbance, characterized
by strong, circulating winds.
CIRCULATING WINDS are known by different names in different places
(according to origin).
Typhoons - Philippines and Western North Pacific Ocean
Cyclones - Indian Ocean
Hurricanes - Eastern North Pacific and North Atlantic Ocean
TROPICAL CYCLONES
CATEGORY
Tropical depression
Tropical Storm
Typhoon
Super Typhoon
MAXIMUM WINDS
Between 35 kph and 64
kph near the center
Between 65 kph and 118
kph near the center
119-200nkph near the
center
Maximum winds greater
than 200 kph
End
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