Tornado disaster management

Presented By

A. Chandra Sekhar

TMBA-2013-05

MBA(ABM)

Violently rotating

column of air

(Vortex) extending

from a

thunderstorm to the

ground

A tornado is

violently rotating

column of air that

is in contact with

both the surface

of the earth and

the base of a

cumulus cloud

1.Waterspout

2.Gustnado

3.Multi-vortex Tornado

4.Landspout

waterspouts tornado are

the ones forming over

water and exhibiting

similar patterns to the

tornadoes forming on

land.

This type is not very

common even if the

tornadoes forming on

land and later entering

water are included.

The word gustnado is a combination

of 'gust front tornado'

A gustnado is a short-lived whirl of

dust and debris lasting from a few

seconds to minutes. These tornadoes

does not possess a condensation

funnel do not always connect the

surface to the base of the closest

cloud base

A tornado is termed as multiple-vortex when it

has more than one vortex rotating around the

main vortex. Here, the other vortices rotate

around the axes; the vortices themselves

rotate in the peripheral region of the eye of

the tornado.

1. A landspout is similar to

waterspout, only difference

being that it is formed on land.

2. These types of tornadoes are

typically weaker than traditional

tornadoes, but can still cause

destruction because they can

create strong winds

Tornado Facts

1. Tornadoes may appear nearly transparent until dust and

debris are picked up or a cloud forms within the funnel.

2. The average tornado moves from southwest to

northeast, but tornadoes have been known to move in

any direction.

3. The average forward speed is 30 mph but may vary from

nearly stationary to 70 mph.

4. The strongest tornadoes have rotating winds of more

than 250 mph.

5. Tornadoes can accompany tropical storms and

hurricanes as they move onto land.

Tornadoes are found most

frequently in the US

In an average year,

1,200 tornadoes cause

70 fatalities and 1,500 injuries nationwide.

"Tornado Alley," or the

states at the highest risk of getting a tornado,

include Arkansas, Iowa,

Kansas, Louisiana,

Minnesota, Nebraska,

North Dakota, Ohio,

Oklahoma, South

Dakota, and Texas.

Fujita Scale EF ScaleFujita Scale 3-Second gust

Speed (mph)

EF Scale 3-Second gust

Speed (mph)

F0 45-78 EF0 65-85

F1 79-117 EF1 86-109

F2 118-161 EF2 110-137

F3 162-209 EF3 138-167

F4 210-261 EF4 168-199

F5 262-317 EF5 200-234

The Fujita Scale categorizes tornado severity based on observed damage.

The six-step scale ranges from F0 (light damage) to F5 (incredible damage).

Since February 2007, the National Weather Service has used the Enhanced

Fujita Scale (EF Scale)

On August 11, 1999, an F2

tornado touched down in

the metropolitan area of

Salt Lake City. The tornado

lasted ten minutes and

killed one person, injured

more than 80 people, and

caused more than $170

million in damages. It was

the most destructive

tornado in Utah's history.

Salt Lake City Tornado,

Aug. 11, 1999

Orange fireball is a power

sub-station exploding.

Where do you think this Tornado ranked on the Fujita Scale?

Tornadoes tough to predict and forecast› Size of storms

› Directions

Tracking and forecasting

The bad news› Tornadoes develop

faster than we thought

› Problems with warnings

Early warningsTornado watch

Tornado warning

Taking shelter – downBasement

In interior room

Under furniture

At a shelter or in a ditch

Tornado survival kit

8ft

30ft

8ft

Equipment house

designed to withstand a

Tornado

Provides Human Shelterin Emergencies

Structure: Rigid

Height: 8 ft.

Building Category:

Length: 30 ft.

Weight: 15,000lbs (approx)

Surface: Moderately Smooth

Wind Velocity: Up to 300mph

IV Hurricane or F5 Tornado

Tornado precautions

Under ground shelters

Crouch down on your knees

and protect your head with

your arms.

Don't run while tornado is

approaching because they are

faster than us

Look for a shelter