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Kate Hammonds

on 24 March 2014

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Transcript of Tonadoes

Top 10 worst tornadoes in history
What are Tornadoes?
A tornado is a fierce, spinning spiral of air stretching from a thunderstorm to the ground. The worst tornadoes are capable of tremendous destruction with wind speeds of up to 300 mph. They can destroy buildings, uproot trees and throw vehicles hundreds of meters. Damage paths can be in excess of 1.6 KM wide and up to 80.5 KM long. In an average year, 1000 tornadoes are reported worldwide.


The 1964 Narail-Magura Tornado
in Bangladesh. About 500 people either were killed or went missing when a fatal tornado hit the cities of Narail and Magura in Bangladesh. Seven villages were destroyed by the tornado’s force. Four hundred people from the village of Bhabanipur were never found.
7. The 1851 Sicily Tornado
Just like the 1951 Comoro Tornado, the tornado that struck Sicily began as a waterspout and because the disaster happened during a time of primitive technology, few details were recorded although it is believed that an estimated 500 people died on that fateful day. There were theories about the tornado. One of the theories was that waterspouts merged as the tornado reached onshore and transformed into two massive and powerful tornadoes.
4. The 1925 Tri-State Tornado
The Tri-State Tornado remains to hold the record for being the worst and deadliest tornado to ever hit the U.S. It reached the highest rating on the Fujita scale of F5. This devastating tornado lasted for 3.5 hours and created 8 more tornadoes. The main tornadoes mostly caused deaths in Missouri, Illinois, and Indiana, while the smaller ones struck Alabama, Kansas, Kentucky, and Tennessee which added to almost 750 deaths.
3. The 1996 Madarganj to Mirzapur Tornado. On May 13 approximately 700 people perished in Bangladesh when a massive tornado reached land from the areas of Madargani all the way to Mirzapur, which includes the districts of Madarganj, Gopalpur, Kallhati, Basail, Shakipur, and Mirzapur in Jamalpur and Tangail. 30,000 homes were left damaged.
2. The 1969 East Pakistan Tornado
An estimated 660 people were killed and a total of 4,000 were injured on April 14 after a huge tornado struck Dhaka in Bangladesh (at the time called East Pakistan) where most people were living. The same day, another tornado hit Homna Upazila, also in Bangladesh where 223 people died. The total was 883 deaths, making it the second deadliest tornado to ever happen in history.

What causes a Tornado?
6. The 1956 Valetta Tornado
The Valetta ended over 600 lives when it reached the Grand Harbour where the shipping armada was spread in the bay, completely destroying it as the great tornado moved along its path.
5. The 1973 Manikganj, Singair and Nawabganj Tornado
Bangladesh is one of the most tornado-affected countries in the world. The major areas of Manikganj, Singair and Nawabganj were destroyed when a wide tornado hit the area. The large village of Balurchar was destroyed along with major parts of nine other towns. The confirmed death toll was at 681.

1. F5 1989 The Daulatpur-Salturia Tornado. The most deadly tornado known to humankind is the April 26 Daulatpur-Salturia Tornado. Again, these areas are found in Bangladesh. These drought-affected areas were hit by another natural disaster. The estimated size of the tornado according to sources was 1.6 km wide. In just minutes, the horrific twister claimed the lives of 1,300 people and left 12,000 others injured. The towns were completely destroyed and 80,000 people were left homeless.

and Typhoons
Most tornadoes form from thunderstorms.
You need warm, moist air from around areas like the Gulf of Mexico and cool, dry air from Canada. When these two bodies of air meet, they create unsteadiness in the atmosphere. A change in wind direction and an escalation in wind speed and height creates an invisible, horizontal rotating outcome in the lower atmosphere. Rising air within the updraft tilts the rotating air from horizontal to vertical. A spinning area, 3.2-9.7 kilometres wide, now spreads through much of the storm. Most strong and violent tornadoes form in this place of strong rotation.

The top ten worst tornadoes are listed here from least to most destruction
10. The Madaripur-Shibchar Tornado in Bangladesh occurred on April 1, 1977. It was one April Fool’s Day which wasn't at all amusing. This deadly tornado hit Madaripur-Shibchar in Bangladesh, which is just south of China, which resulted with approximately 500 deaths and hundreds of injuries. The tornado cleared the area, trees, homes and other structures were completely damaged as the tornado passed through the villages of Madaripur and Shibchar.
9. The 1951 Como ro Tornado
The string of islands of Comoros off the eastern coast of Africa was struck by a disastereous tornado in 1951. The twister started as a waterspout and gained strength and intensity as it struck land and killed around 500 people.
Light damage.
Some roofs damaged; branches broken off trees; shallow-rooted trees uprooted; damaged road signs.
Moderate damage.
Surfaces peeled off roofs; mobile homes launched off foundations or overturned; cars blown off roads.
Considerable damage
Roofs ripped off frame houses; mobile homes destroyed; boxcars flipped; large trees snapped or uprooted; light objects flung around; cars lifted into the air.
Severe damage.
Roofs and some walls torn off strong houses; trains flipped over; most forest trees uprooted; heavy cars pulled off the ground and thrown.
Devastating damage.
Strong houses flattened; weak structured foundations blown away some distance; cars thrown and large objects flung.
Incredible damage.
Strong frame houses destroyed and swept away; truck sized objects fly through the air in excess of 100 meters; tree bark stripped; incredible phenomena will occur.

Fuijita Scale
Typhoons are much like hurricanes, cyclones and tornadoes. The main difference is where they occur and their names.
Our experiment is showing how a thunderstorm can turn into a tornado.
A lot of tornadoes occur in Bangladesh. This is because Bangladesh is in the perfect tornado hotspot.

Tornado Patterns
Bangladesh is just below China and is directly between sources of warm and cool air. This creates many tornadoes.
The devastating result after a tornado
The end result of a tornado is devastating. Not only does a tornado physically destroy whole cities, but it can also financially destroy cities for months, even years. Many people lose their lives and loved ones and even more are at least injured. On a financial scale, tornadoes can turn a country from top economy down to middle class if they hit the right spot.
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