Report Text Thunderstorm
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Thunderstorms result
from the rapid upward movement of warm, moist air. They can occur inside
warm, moist air masses and at fronts. As the warm, moist air moves
upward, its cools, condenses, and forms cumulonimbus clouds that can
reach heights of over 20 km. As the rising air reaches its dew point,
water droplets and ice form and begin falling the long distance through
the clouds towards the Earth’s surface. As the droplets fall, they
collide with other droplets and become larger. The falling droplets
create a downdraft of air that spreads out at the Earth’s surface and
causes strong winds associated with thunderstorms.
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Thunderstorm
A thunderstorm, also known as an electrical storm, a lightning storm,
thundershower or simply a storm is a form of weather characterized by
the presence of lightning and its acoustic effect on the Earth’s
atmosphere known as thunder.The meteorologically assigned cloud type
associated with the thunderstorm is the cumulonimbus. Thunderstorms are
usually accompanied by strong winds, heavy rain and sometimes snow,
sleet, hail, or no precipitation at all. Those which cause hail to fall
are known as hailstorms. Thunderstorms may line up in a series or
rainband, known as a squall line. Strong or severe thunderstorms may
rotate, known as supercells. While most thunderstorms move with the mean
wind flow through the layer of the troposphere that they occupy,
vertical wind shear causes a deviation in their course at a right angle
to the wind shear direction.
Thunderstorms can generally form and
develop in any geographic location, perhaps most frequently within areas
located at mid-latitude when warm moist air collides with cooler
air.Thunderstorms are responsible for the development and formation of
many severe weather phenomena. Thunderstorms, and the phenomena that
occur along with them, pose great hazards to populations and landscapes.
Damage that results from thunderstorms is mainly inflicted by downburst
winds, large hailstones, and flash flooding caused by heavy
precipitation. Stronger thunderstorm cells are capable of producing
tornadoes and waterspouts.
There are four types of thunderstorms:
single-cell, multicell cluster, multicell lines, and supercells.
Supercell thunderstorms are the strongest and the most associated with
severe weather phenomena. Mesoscale convective systems formed by
favorable vertical wind shear within the tropics and subtropics are
responsible for the development of hurricanes. Dry thunderstorms, with
no precipitation, can cause the outbreak of wildfires with the heat
generated from the cloud-to-ground lightning that accompanies them.
Several methods are used to study thunderstorms, such as weather radar,
weather stations, and video photography. Past civilizations held various
myths concerning thunderstorms and their development as late as the
Eighteenth Century. Other than within the Earth’s atmosphere,
thunderstorms have also been observed on Jupiter and Venus.
Taken from: http://en.wikipedia.org/wiki/Thunderstorms
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