What is a Tornado

        A tornado is a violent rotating column of air. They can destroy large buildings, uproot trees and throw vehicles hundreds of yards. Damage paths can be in excess of one mile wide to 50 miles long. In an average year, 1000 tornadoes are reported nationwide.

How They Form

          Tornadoes need warm, moist air from the south and cool, dry air from the north. Most tornadoes form from supercells. When these two different temperatures meet they create instability in the atmosphere. The different wind direction, increasing wind speed, and increasing height creates an invisible, horizontal spinning effect in the lower atmosphere. Rising air within the updraft shifts the spinning air from horizontal to vertical and a tornadoes is made.

Supercells: a system producing severe thunderstorms and featuring rotating winds

Types of Tornados

Historical Examples

Barneveld, WI Tornado

Date: June 7 to 8, 1984

Duration: 12 hours

Tornado type: F5

Damages: $40 million in repairs

Casualties: 13

Missouri, Illinois and Indiana Tornado (Tri-State Tornado)

Date: Wednesday, March 18, 1925

Duration: 7 hours

Tornado type: F5

Damages: $1.4 billion in repairs

Casualties: 747 plus

Impact on Human Life

        People have to have somewhere safe to go when there is a tornado like a basement or a room without windows. Lots of people have to pay lots of money for repairs from the tornado. People have to build sometimes extra places for the storm and also have to spend money to have a bag of supplies like food, water, pillow, blanket, first aid kit, and tools. Remember to have a phone or radio to know the weather coming your way.

Comment Stream

2 years ago

Maybe you could put in some more info on "Impact on Human Life". :)

2 years ago

And the historical facts :)