Thunderstorm• It begins to from when warm humid air moves upwards rapidly

• The sun heats a place on Earth’s surface ,which , in ,turn , warms the air mass above it.

• Then a cold front may push under the warm air mass , or wind may force it upward.

• The higher surrounding air is colder than the rising air mass.

• As the warm air cools, the water vapor in it condenses into air droplets, which forms a cloud

• Soon the water droplets become heavy enough to fall as rain .

• The falling rain pulls in cool air with it.

• Winds blow both upward and downward in the cloud .

• Negative electric charges build up in the bottom of the cloud.

• The charges travel through the air in a lightning discharge .

• The air along the path of a lightning bolt extremely hot

• The air along the path of a lightning bolt extremely hot

• The intense heat makes the air expand so fast that sound waves are produced .

Tornado • It is a violently rotating column of air that extends downward from

thunderclouds and touches the ground.

• A tornado starts when winds spin a column of air that bulges from the bottom of the cloud .

• Strong updrafts ,or rising air ,are already present inside this bulge.

• Next warm, humid air is pulled into the often funnel-shaped column.

• The air spins so fast that an area of very low pressure forms in the center.

• The swirling funnel starts to descend.

• Because of the low pressure air in the near by area rushes into the funnel.

• The air in the funnel rotates upward around the center, joining the storm above.

• The wind speed in the tornado can reach 400km/hr or more.

• The force of the tornado ‘s winds destroy houses , cars and anything in its path.

Hurricane

It is a large ,rotating tropical storm system with wind speeds of at least

119km/hr

What is a hurricane?

A hurricane is a very destructive and dangerous

storm. It forms in stages. The hurricanes are filled

with rain, strong winds, lightning, thunder, hail

and tornadoes.

Stages of the hurricane :

1)Tropical depression

2)Tropical storm

3)Hurricane (wind speed 120km/hr)

What is eye of a hurricane?

While some hurricanes, are

small, others can be quite

large. Hurricanes are mighty

storms.

In the center of a hurricane

is an eye. Ironically, the eye

is actually a calm area in a

hurricane.