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TORNADOES By: Nicholas Brooks WHAT ARE TORNADOES? “A tornado is a violently rotating column of air that is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. They are often referred to as twisters or cyclones, although the word cyclone is used in meteorology, in a wider sense, to name any closed low pressure circulation”. What Causes Tornadoes “Most tornadoes form from thunderstorms. You need warm, moist air from the Gulf of Mexico and cool, dry air from Canada. When these two air masses meet, they create instability in the atmosphere. 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 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”. THE FOLLOWING TOOLS TO IDENTIFY TORNADOES ARE….. What are the effects “Impact of tornadoes. Like all natural disasters such as hurricanes, earthquakes, floods and others, they end up with massive destruction to homes, property, infrastructure and cause many deaths as well. Each year, about 60 people are killed by tornadoes, mostly from airborne debris”. WHERE THE MOSTLY OCCUR (Map on next Slide) Tornadoes mostly occur in “Most tornadoes are found in the Great Plains of the central United States” HOW TO AVOID TORNADOES One thing you have to do is protect yourself is to have your roof inspected yearly. If your on a road DON’T hide under a overpass. The tornado will break through causing the rubble to fall on you and may have a chance to crush you. HOW TORNADOES ARE MEASURED The Fuijita scale is used to measure tornadoes. The Fuijita scale measures tornadoes by using EF 1-5 Also certain shows chase storms and measure them from a safe distance. http://tornadochaser.net/safety.html eschooltoday.com/natural-disasters/tornadoes/impact-of-tornadoes.html http://www.weatherwizkids.com/?page_id=60 https://en.wikipedia.org Thanks for watching Watch out for tornadoes!!
