GEOG101 Tornado Presentation


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GEOG101 Tornado Presentation

  1. 1. Tornadoes Tracy Mascorro Geog101
  2. 2. What is a Tornado? * A rotating column of air that is in contact with the ground and cloud base. Tornadoes form due to warm moist air that is blown in from the Gulf, cold air from Canada, and dry air from the Rockies Nearly 1300 tornadoes hit the US alone, on average, in one single year.
  3. 3. Where is it? Tornadoes are most commonly seen in the United states, specifically in Tornado Alley, but can be found in other countries as well. The United States has 4 times the amount of tornadoes than Europe.
  4. 4. The Unknown of a Tornado Tornadoes are still being observed and are not quite understood. *Tornadoes could dissipate because of the air stabilizing. This could be caused by the cold outflow from other storms. *Every storm is different. While one tornado includes hail, rain, and lightening; another may have neither of those.
  5. 5. “Tornadoes skip around?” Not necessarily, as the definition clearly states, a tornado needs to have contact with the ground and the cloud base in order to be defined as a tornado. However, there are 3 reasons why this may seem possible: • • • The tornado is to weak to cause damage Multiple tornadoes happened; but there was no survey done to precisely separate their paths (very common before the 1970s); or There were multiple tornadoes with only short separation, but the survey erroneously classified them as one tornado.
  6. 6. Sub Vortices A sub vortice is a multi vortex tornado, containing multiple tornadoes that are usually orbiting the center of a larger tornado circulation. The larger tornado could also absorb the other tornadoes but this is very unusual.
  7. 7. Historical Facts Deadliest Tornado: "Tri-state" tornado of 18 March 1925 killed 695 people Biggest 24 Hr Outbreak: 175 tornadoes on 27-28 April 2011, with a damage-rating breakdown of EF0: 59, EF1: 65, EF2: 20, EF3: 16, EF4: 11, and EF5: 4 Biggest Tornado Recorded: 31 May 2013, a deadly, multiple-vortex tornado near El Reno, OK carved a maximum path width of 2.6 miles Most Traveled Tornado: In 1917 traveled 570 kilometers (About 354 miles) across Illinois and Indiana lasting well over 7 hours
  8. 8. Other Tornado-Like Features Waterspout: A tornado over water Landspout: Dust Tube Tornado Gustnado: Gust Front Tornado Fire Whirl: Small-scale, tornado-like circulations can occur near any intense surface heat source Dust Devil: Are formed without clouds and are very weak.
  9. 9. The Problem with Tornadoes *They are expensive because they cause a lot of damage. *There is not enough time between the warnings and an arrival of a tornado to warn people to take shelter.
  10. 10. What Can Be Done? *Cities can provide more underground shelter for the homeless and people living in apartments, as well as safe rooms for housing. *Technology can be used to continue to research tornadoes and find a way to predict them sooner. *Building codes need to be changed for areas that are prone for tornadoes. *People need to be aware, and not ignore, the types of tornado warnings: *Tornado Watch is when a certain area is alerted that it may be possible a tornado may happen but it is not for certain. *Tornado Warning is when a tornado has been spotted and you should take cover right away.
  11. 11. References Mr. Thorne English 6 Class. (2003, March 21). Tornadoes. Retrieved from - jk and mg.htm National Weather Service. (2013, August 30). The online tornado faq. Retrieved from Pidwerny, M. (2008, May 28). Tornadoes. Retrieved from United States Environmental Protection Agency (2013, May 21). Tornadoes. Retrieved from Wikipedia. (n.d.). Tornado. In Retrieved from
  12. 12. Pop Quiz!