Transcript Tornados
By Faith Parsons 2nd hour How do tornados form? • Thunderstorms from in warm, moist air eastmoving cold fronts. When these thunderstorms from they may produce hail, strong winds, and tornados. Step by Step • 1. A change in wind direction happens before thunderstorms from. The wind speed increases and the height creates a invisible spinning effect in the lower atmosphere. • 2. Rising air in the thunderstorm tilts the rotating air from horizontal to vertical. • 3. And area of rotation 2-6 miles wide now forms the tornado. When and where do tornados happen? • All the time but mostly during the spring • Mostly along the front range of the Rocky Mountains in “Tornado alley”. But can occur anywhere. Rating system F-scale number Intensity Phrase Wind Speed Type of Damage Done F0 Gale tornado 40-72 mph Some damage to signs and trees F1 Moderate tornado 73-112 mph peels surface off roofs, mobile homes overturned F2 Significant tornado 113-157 mph Roofs torn off frame houses, mobile homes destroyed F3 Severe tornado 158-206 mph well constructed houses torn. Trains overturned. F4 Devastating tornado 207-260 mph Cars thrown F5 Incredible tornado 261-318 mph Hoses lifted and carried F6 Inconceivable tornado 319-379 mph All of the above and more How can you prepare for a tornado? • Stay Informed about the storm. Make sure you know where it is going. • Look out for the WATCHES and the WARNINGS. • Have a set place to hide if the storm is close. Make sure your not near any windows. • Make sure you set place is safe and not going to be damaged by the storm. Like a basement or a bathroom. • It’s a good idea to have a radio with you to hear updated about the storm. Hyperlinks • http://www.nssl.noaa.gov/edu/safety/tornad oguide.html • http://www.tornadoproject.com/ • http://www.tornadochaser.net/tornalley.html • Clip art Tornados in Genesee County occurred during 1950-2010 • • • • • 40 tornados They caused 120 deaths They caused 911 injuries The strongest tornado was a F5 They happened most in June, July, and August.