2. What is Tornado?
Here is a simple definition of
tornado. A tornado is a rotating
column of air that is in contact with
both the surface of the earth and
cumulonious cloud. It is a low
cloud:- It is storm
cloud. To make it
more broad, it is
3. Cause of Tornado
Factors causing a Tornado are :
(1) Instability in weather: It refers to unusually warm
and humid conditions in the lower atmosphere, and
possibly cooler than usual conditions in the upper
(2) Wind Shear: It refers to the wind direction
changing, and the wind speed increasing, with
The intense spinning of a tornado is partly the
result of the updrafts (upward drought of air) and
downdrafts (downward draught of air) in the
thunderstorm interacting with the wind shear,
resulting in a tilting of the wind shear to form an
upright tornado vortex. How the column of air
begins to rotate is not completely understood by
4. The Information…
Wind Speed: less than 177km/hr
250 ft across the land
Travels few kilometers
Wind Speed: more than 300 km/hr
Travels up to 100 km
Tornadoes are classified using the Enhanced Fujita Scale. Most
tornadoes (~88%) are considered weak (EF0 or EF1) and about
95% of all U.S. tornadoes are below EF3 intensity.
5. Disaster caused by Tornado:
Tornados can cause rapid
destruction of homes and
property, as well as injury
and death to humans and
As nicknamed the devil
storm, it is responsible for
the loss of many lives.
In the United States, on average, 1000
tornadoes are reported nationwide each year,
resulting in 70 deaths and over 1,500 injuries.
They occur most frequently east of the Rocky
Mountains during the spring and summer
months. Tornado Alley is a nickname given to an
area in the southern plains of the central U.S.
that consistently experiences a high frequency
of tornadoes each year.
Read the complete at:
Know the warning signals of your area.
Obtain insurance for your family and home.
Choose a post hazard meeting place for your family, neighbors.
Make a family communication plan.
Share this information with your family, neighbors.
In a public building such as a store or office, go to a designated shelter
area such as a safe room, basement, storm cellar, or the lowest building
If there is no basement, go to the center of an interior room such as a
bathroom or closet on the lowest level away from corners, windows,
doors and outside walls.
At home, go to a basement or the most interior room on the first floor.
If caught in the open, lie flat in a nearby ditch or depression and cover
your head with your hands to protect yourself from flying debris. Flying
debris from tornadoes causes most fatalities and injuries.
Be alert to hazards created by tornado damage such gas leaks, broken
glass and exposed electrical wires. Check for injuries, but don’t try to
move someone who is seriously injured unless they are in immediate
danger of death or further injury.
8. The Tri-State Tornado
The Great Tri-State Tornado of Wednesday, March 18, 1925, is the deadliest
tornado in U.S. history, affecting the states of Missourie, Illinois and Indiana. It
was a F5 tornado. 1000 people were killed and 3000 were hurt.
9. Daulatpur-Saturia Tornado, Bangladesh
he Daulatpur–Saturia, Bangladesh tornado was an extremely
destructive tornado that occurred in the Manikganj District, Bangladesh on April
26, 1989. It was the costliest and deadliest tornado in Bangladesh's history.
There is great uncertainty about the death toll, but estimates indicate that it
killed around 1,300 people, which would make it the deadliest tornado in the
10. East St. Louis Tornado
The 1896 St. Louis – East St. Louis tornado is a historic tornado event that occurred on
Wednesday, May 27, 1896, as part of a major tornado outbreak across the United States .
One of the deadliest and most destructive tornadoes in U.S. history, this very large, long-track,
and violent tornado was the most notable of an outbreak which produced other large,
long-track, violent, killer tornadoes. It caused over $10,000,000 in damage.
11. 1936 Tupelo–Gainesville tornado
The 1936 Tupelo–Gainesville tornado outbreak was an outbreak of at
least 12 tornadoes that struck the Southeastern United States from April
5–6, 1936. Approximately 454 people were killed by these tornadoes—
419 by two tornadoes alone. This outbreak is the second deadliest ever
recorded in US history
12. Oklahoma Tornado
The 2013 Moore tornado was an F5 tornado that struck Moore, Oklahoma
and adjacent areas on the afternoon of May 20, 2013; with peak winds
estimated at 210 mph (340 km/h), killing 24 people and injuring 377 others.
13. I hope everyone takes necessary
precautions during tornado or any other
natural disaster so that they may stay
THANK YOU !