Tornadoes natural disaster

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  • Tornado
  • Rumsha Masood (11-ENV-22) Aleena Syed (11-ENV-28) Saira Shehzadi(11-ENV-06) AafiaTehrim (11-ENV-71)
  • A tornado is a violently rotating column of air that is in contact with both the surface of the earth and a cumulous cloud.
  • Tornadoes come in many shapes and sizes, but they are typically in the form of a visible condensation funnel, whose narrow end touches the earth and is often encircled by a cloud of debris and dust.
  • Most tornadoes have wind speeds less than 110 miles per hour (177 km/h) and travel a few miles (several kilometers) before dissipating. The most extreme tornadoes can attain wind speeds of more than 300 miles per hour (483 km/h), stretch more than two miles (3.2 km) across, and stay on the ground for dozens of miles (more than 100 km).
  • How do Tornadoes form? Before thunderstorms develop, a change in wind direction and an increase in wind speed with increasing height creates an invisible, horizontal spinning effect in the lower atmosphere. Rising air within the thunderstorm updraft tilts the rotating air from horizontal to vertical. An area of rotation, 2-6 miles wide, now extends through much of the storm. Most strong and violent tornadoes form within this area of strong rotation.
  • Various types of tornadoes include Land spout Multiple vortex tornado Waterspout Dust devil Steam devils
  • RADAR Today, most developed countries have a network of weather radar. In the United States and a few other countries, Doppler weather radar stations are used.These devices measure the velocity and radial direction (towards or away from the radar) of the winds in a storm, and so can spot evidence of rotation in storms from more than a hundred miles (160 km) away. DETECTION
  • Strength is measured by the Fujita Scale... F0 = weakest, F5 = Strongest
  • Joplin, Missouri EF-5 Tornado
  • Introduction Recorded on 22 May,2011. It hit the city name joplin,of the Missouri a state of America. It came at 5:35 pm in the evening.
  • RANGE AND FREQUENCY Wind speed 210 mph. The tornado's total track length was at least 22.1 miles (35.6 km) long. It reached a width of atleast one mile(1.6 km). It was recorded as EF-5 according to Fujita scale.
  • DAMAGES Approximately 160 people died from this tornado. The injuries were estimated to be around 1,000. 7,000 houses and 2,000 buildings were destroyed. An estimated 750 people have been treated at area hospitals.
  • Note the pavement ripped up from the road and piled in front of the cars.
  • St John Regional Medical Centre
  • Note the pavement ripped up from the road
  • St John Regional Medical Centre
  • A church school in Joplin was also flattened.
  • Aftermath and impact A preliminary survey of the tornado damage by the National Weather Service, began on May 23. According to National Weather Service , about 25% of Joplin was destroyed. The tornado caused $2.2 Billion Dollars in damage.
  • Response Millions more dollars went to individuals for temporary housing and other living expenses. Three temporary cell towers by May 24, had been restored. President Obama greeted a tornado survivor on May 29, 2011.
  • SIGNIFICANCE seventh deadliest tornado in U.S. history. 26th-deadliest tornado inWorld history. It was the first EF5 tornado in Missouri since 1957.
  • The Tri-State Tornado of 1925The Tri-State Tornado of 1925
  • Introduction Recorded on March 18, 1925. which roared through parts of Missouri, Illinois, and Indiana. Tornado arrived in Indiana after devastating parts of Missouri and Illinois. This tornado occur at 11pm.
  • Wind speed 73 mph, 117 km/h . longest path length (219 miles, 352 km). It was likely an F5. longest duration (about 3.5 hours) RANGE AND FREQUENCY
  • Tornado Path
  • 695 fatalities recorded. DAMAGES The injuries were estimated near 2,027 .
  • Thousands of homes and other buildings in the tornado's path were leveled. Over 15,000 homes and cities were destroyed.
  • Significance It was the most extreme tornado in recorded history of U.S. It was likely an F5, though tornadoes were not ranked on any scale in that era. NOAA (National Oceanic and Atmospheric Administration) resources say $16.5 million worth of damage was caused by the tornado, but it does not specify if that is modern amounts or the amount in 1925.
  • Daultipur-SalturiaTornado Bangladesh
  • Introduction It hit the city of Bangladesh that is Daulatpur- Saturia and Dhaka. Recorded in April 26th , 1989. It took place at 6:30pm local time.
  • Range and Frequency It damaged the entire area of both cities of Bangladesh. The tornado completely destroyed virtually every structure it touched. It was estimated to be one mile wide and had a path that was 50 miles north west and north of Dhaka striking 5 districts through the poor slums of Bangladesh.
  • Range and Frequency Wind speed 125mph. It lasted 20 minutes or longer. Fujita scale rating is unknown due to poor housing construction and lack of data.
  • Damages Destroyed 90% of the homes and 153 villages. An estimated 1,300 people died from this tornado. The injuries were estimated to be around 100,000. Damages occurred due to poor housing and construction standards. 80,000 people were homeless by the storm.
  • Damages
  • Significance One of the extreme tornadoes in history. Even though it was deadliest but did not give a proper name. Bangladesh is a country with highest frequency Tornadoes after United States.
  • Aftermath and impacts According to recorded survey area had been in the state of drought for six months after the tornado hit. It was the costliest tornado in Bangladesh's history. Due to it's big size it caused billions in damage.
  • Temporal spacing In Bangladesh, there are 2 tornado season ( March to May and October to November) About 25-30 local severe thunderstorms and tornadoes lash the country during each of the two tornado seasons
  • This tornado destroyed every thing it touched.
  • TornadoSafetyRules 1. Seek shelter under a sturdy table in the basement. 2. If no basement is available, go to a first floor, small interior room or a room on the opposite side from a tornado. Stay away from windows. 3. In schools, churches, and shopping centers, go to designated shelters away from outside walls, glass, and large rooms (malls, auditoriums). Get under a table or counter or in a restroom or small storeroom. DO NOT GOTOYOUR PARKED CAR
  • Tornado Safety Rules 4. In motels, lie down in the lowest-level interior hallway away from glass. Dive under a bed or pull a mattress on top of you as last resort. 5. In a vehicle, drive away at a right angle to the storm movement. DO NOT GET CAUGHT INYOURVEHICLE. Abandon your vehicle and lie in a ditch or culvert or under a low bridge. Overall: Underground and under a table are the watchwords. People who get under something usually survive.
  • References _Saturia_tornado_cost