1. Tornadoes

2. How tornadoes are formed The process begins with the storm drawing into itself warm, humid air. The warm air rises To a point where the moisture condense into rain. This sets up an opposing motion: cool downdraft. Changes in wind speed or direction at higher altitudes- called wind shear- can knit together the cool air and warm air in a horizontally spinning tube. Like a giant invisible steamroller. If more wend shifts tilt this tube so that one end touches the ground.

3. Tornado classification EF-Scale:Old F-Scale:Typical Damage: EF-0 (65-85 mph) F0 (65-73 mph)Light damage. Peels surface off some roofs; some damage to gutters or siding; branches broken off trees; shallow-rooted trees pushed over. EF-1 (86-110 mph) F1 (73-112 mph)Moderate damage. Roofs severely stripped; mobile homes overturned or badly damaged; loss of exterior doors; windows and other glass broken. EF-2(111-135 mph) F2 (113-157 mph)Considerable damage. Roofs torn off well-constructed houses; foundations of frame homes shifted; mobile homes completely destroyed; large trees snapped or uprooted; light-object missiles generated; cars lifted off ground. EF-3 (136-165 mph) F3 (158-206 mph)Severe damage. Entire stories of well-constructed houses destroyed; severe damage to large buildings such as shopping malls; trains overturned; trees debarked; heavy cars lifted off the ground and thrown; structures with weak foundations blown away some distance. EF-4 (166-200 mph) F4 (207-260 mph)Devastating damage. Whole frame houses Well-constructed houses and whole frame houses completely leveled; cars thrown and small missiles generated. EF-5 (>200 mph) F5 (261-318 mph)Incredible damage. Strong frame houses leveled off foundations and swept away; automobile-sized missiles fly through the air in excess of 100 m (109 yd); high-rise buildings have significant structural deformation; incredible phenomena will occur. EF No ratingF6-F12 (319 mph to speed of sound) Inconceivable damage. Should a tornado with the maximum wind speed in excess of EF-5 occur, the extent and types of damage may not be conceived. A number of missiles such as iceboxes, water heaters, storage tanks, automobiles, etc.will

4. Doppler Radar Doppler Radar: is a form of radar that can detect motion directly. Doppler radar uses what is called the Doppler effect: observable change in frequency of waves produced by the motion of a wave source or the reciver. It was created by Christian Doppler, an Australian physicist in 1842

5. Doppler radar http://www.bing.com/videos/search?q=doppler%20radar%2 0tornado&qs=VI&form=QBVR&pq=doppler%20radar%2F%20 t&sc=8- 16&sp=2&sk=VI1&ajf=70&ffirst=1#view=detail&mid=B6A689 3EDE5EED216AC5B6A6893EDE5EED216AC5 The link above is a explanation of how to read Doppler radar Below is a 3D map of a storm cell that produced the Vilonia Tornado The picture on the right shows A reflectivity view of Doppler radar.

6. citation s http://www.bing.com/images/search?q=Doppler+Image+of++f5+Tornad o&qs=n&form=QBIR&pq=doppler+image+of+f5+tornado&sc=0-24&sp=- 1&sk= http://www.bing.com/images/search?q=Doppler+Image+of++f5+Tornad o&qs=n&form=QBIR&pq=doppler+image+of+f5+tornado&sc=0-24&sp=- 1&sk= http://www.wunderground.com/tornado/?show=significant http://www.bing.com/images/search?q=How+Do+Tornadoes+Form&For m=IQFRDR http://www.bing.com/images/search?q=How+Do+Tornadoes+Form&For m=IQFRDR http://en.wikipedia.org/wiki/April_27%E2%80%9330,_2014_tornado_o utbreak http://en.wikipedia.org/wiki/April_27%E2%80%9330,_2014_tornado_o utbreak http://www.nationalgeographic.com/eye/tornadoes/phenomena.html