This ppt explains you about storms, cyclones, difference between them and also about thunderstorm.

3.  A storm that has both thunder and
lighting is called a thunderstorm.
 It is a violent weather condition of
heavy rainfall and high speed winds.

4.  Thunderstorms develop in hot,
humid tropical areas like India very frequently.
 The rising temperatures produce strong
upward rising winds.
 These winds carry water droplets upwards,
where they freeze, and fall down again.
 The swift movement of the falling water
droplets along with the rising air create
lightning and sound.
 It is this event that we call a thunderstorm.

6.  Tornado is an extremely
strong and dangerous
wind that blows in a
circle.
 It proceeds in a rotating
column and extends
form the surface of the
Earth to a thundercloud.
 A tornado is a dark
funnel shaped cloud that
reaches from the sky to
the ground

8.  A violent storm with very strong winds which
move in a circle is called a cyclone.
 A severe form of thunderstorm leads to a
cyclone .

9. Before cloud formation, water takes
up heat from the atmosphere to change
into vapour. When water vapour changes
back to liquid form as raindrops, this
heat is released to the atmosphere. The
heat released to the atmosphere warms
the air around. The air tends to rise and
causes a drop in pressure. More air
rushes to the centre of the storm. This
cycle is repeated. The chain of events
ends with the formation of a very
low-pressure system with very
high-speed winds revolving around it.
It is this weather condition that we call
a cyclone. Factors like wind speed,
wind direction, temperature and
humidity contribute to the development
of cyclones.

11.  At approximately 11 pm local time, 13 April 2010, a severe storm struck parts of Bangladesh
and eastern India. It lasted about 90 minutes, with the most intense portion spanning 30–40
minutes. Over 91,000 dwellings were destroyed in India and several thousand in Bangladesh.
 According to local officials the storm was an extreme northwestern commonly formed over
the Bay of Bengal during the hot months of the year. The cool air in the clouds was met by
hot air rising from the ground, which caused the storm to start rotating. Although
thunderstorms had been predicted, the severity of the storm was unexpected.
 The storm struck in northeastern parts of West Bengal and Bihar states, with winds estimated
from 120–160 kilometers/hour (75–100 miles/hour), then moved into Bangladesh. The strong
winds uprooted trees, displaced roof tops, and snapped telephone and electricity lines. Power
was lost throughout the area, and communication was difficult due to severed phone lines and
damaged rail lines. Nepal, which relies on India for part of its power generation, was also
affected by the outages. The initial strong winds were followed by heavy rains, causing
further damage to weakened structures. Widespread damage to crops and livestock was also
reported in both West Bengal and Bihar, as well as in Bangladesh. More than
8,000 hectares of maize was destroyed in West Bengal. More than 4,000 hectares of maize .
In Assam, paddy crops, bananas, and other vegetation were damaged. Assam crops were
already in poor shape due to earlier hail storms before 13 April storm, and were further
damaged by another strong storm on 15 April.

12. In Bihar, storm victims are being given rice, cash, and asbestos sheets to rebuild their
houses. Families of the deceased are also receiving money to pay for last rites plus an
ex gratia payment of Rs 150,000 from the Chief Minister's Relief Fund. Phone service
was restored to most of the region after 30 hours without service, However, areas near
the Nepal-India border remained without power on 17 April. On 20 April, the Bihar
Electricity Board said that it would be at least a month to repair all damaged electrical
transmission towers. Rolling blackouts were conducted in Nepal to combat the
decreased electricity availability
In West Bengal, Civil Defense Minister Srikumar Mukherjee is personally overseeing
rescue efforts.As of 15 April, all major roads and rail lines were cleared and power had
been restored to 50% of the population. However, some of the hardest hit towns had not
yet received any government aid by 16 April, causing widespread anger. Mukherjee
admit state government was struggling to distribute food rations, blaming insufficient
manpower for the delay.
In Assam, food and building supplies have been distributed to storm victims."We have
taken all possible measures to provide relief and other financial assistance to people hit
by the storm," remarked Relief and Rehabilitation minister Bhumidhar Barman.An ex
gratia payment of Rs 5,000 was announced for the next of kin of storm victims, plus Rs
300,000 to be released at a later date.

13. Storm
 A storm is bad weather
with precipitation.
 Storm is a violent
disturbance of the
atmosphere with strong
winds and usually rain,
thunder, lightning, or
snow.
Cyclone
 A cyclone is any low
pressure.
 Cyclone is a system of
winds rotating inwards to
an area of low barometric
pressure, with an
anticlockwise (northern
hemisphere) or clockwise
(southern hemisphere)
circulation; a depression.