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	Tornado Alley - Wikipedia, the free encyclopedia
		Tornado Alley is a colloquial term most often used in reference to the area of the United States in which tornadoes are most frequent.
		In the heart of tornado alley, building codes are often stricter than those for other parts of the U.S., requiring strengthened roofs and more secure connections between the building and its foundation.
		Nearly all of these tornadoes are weak and not produced by supercell thunderstorms, Oklahoma has the highest occurrence of such "classic" tornadoes.
	en.wikipedia.org /wiki/Tornado_Alley (276 words)

	Tornado - Wikipedia, the free encyclopedia
		Tornadoes are known for being extremely destructive and are usually visible due to water vapor from low pressure condensation and debris from the ground.
		Tornadoes form in storms all over the world, and though they have been recorded in all fifty U.S. states, they form most famously in a broad area of the American Great Plains, Midwest, as well as South known colloquially as Tornado Alley.
		Tornadoes do occur throughout the world as well; the most tornado-prone region of the world (outside North America), as measured by number of reported tornadoes per unit area, is the Netherlands, followed by the United Kingdom (especially England).
	en.wikipedia.org /wiki/Tornado (2820 words)

	Tornado Alley - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-12)
		Tornado Alley is the American Meteorological Society's designation for the area of the United States in which tornadoes are most frequent.
		However, when land area is taken into account, Florida has the highest density of tornado occurrence in the country [2] (http://lwf.ncdc.noaa.gov/img/climate/severeweather/small/avgtpsm.gif).
		Throughout the many tornado seasons however, most damage is done in the plains states, inlcuding Kansas, Oklahoma, Nebraska, and Texas.
	www.birmingham.us /project/wikipedia/index.php/Tornado_Alley (238 words)

	Reference.com/Encyclopedia/Tornado
		A tornado is a violent windstorm characterized by a twisting, funnel-shaped cloud.
		Tornadoes normally rotate in a cyclonic direction as the warm air thunderstorms usually form in sweeps north and jet streams come from the west, creating a situation in which the storms rotate.
		However, tornadoes do occur throughout the world; the most tornado-prone region of the world, as measured by number of tornadoes per unit area, is the United Kingdom, especially England http://www.torro.org.uk/severeweather/tornadofaqs.htm.
	www.reference.com /browse/wiki/Tornado (1825 words)

	Tornado Alley Maps and Information
		Tornado alley maps are all made up of a general area from data taken over a long period of time.
		Tornado alley should be thought of on a more yearly basis also, since weather patterns can change, making some states harder hit one year versus others, like Illinois in 1925, 1974 and 2004.
		While it may be true that tornado frequency may be highest in a small area in the US on a yearly basis, dangerous and violent tornadoes happen over many tornado alley sections within the US that may have prolonged droughts of tornadoes before being annihilated by large, long lived tornadoes again and again.
	www.tornadochaser.net /tornalley.html (1643 words)

	ESRI News - Spring 2001 ArcNews -- Tornado Alley "What If" Scenario Brought to Life with GIS
		It was another in the growing list of major bullets dodged by Dallas-Fort Worth, the largest populated area in "tornado alley." Devastating tornado outbreaks have occurred within 100 to 200 miles in nearly all directions from the Dallas-Fort Worth Metroplex—most within the last 20 years and several within the last five years.
		For every step along each tornado damage path, ArcInfo and ArcView GIS were used to estimate the number of structures, their appraised value, the number of residents, the number of employees, and the estimated vehicular traffic—and grouped them by tornado damage contour.
		In addition to the five primary scenarios, a smaller subset of tornado paths (which included the most powerful tornado in the outbreak) was mapped 50 times side by side in 2.5-mile increments across the core of the Metroplex.
	www.esri.com /news/arcnews/spring01articles/tornado-alley.html (1396 words)

	Tornado Alley, USA: Science News Online, May 11, 2002
		Tornadoes are violently rotating columns of air suspended from so-called cumuliform clouds, which are dense, tall, and characterized by rising mounds, domes, or towers of condensed water vapor.
		Because tornadoes can't be characterized by their apparent size—and because some are never seen at all—they're rated according to the damage they cause to humanmade structures.
		Tornadoes have been spotted on every continent except Antarctica, says Harold Brooks of the National Severe Storms Laboratory in Norman, Okla. Most other nations haven't been tracking twisters as long as the United States has, and their records are much less thorough, he notes.
	www.sciencenews.org /20020511/bob9.asp (2439 words)

	tornado
		Although tornadoes have occurred on every continent except Antarctica, they are most common in the continental United States, where tornadoes typically form over the central and southern plains, the Ohio valley, and the Gulf states.
		The area where the most violent storms commonly occur in the United States is known as Tornado Alley, which is usually understood to encompass the plains from N central Texas north to the Dakotas, with the peak frequency located in Oklahoma.
		A tornado typically travels in a northeasterly direction with a speed of 20 to 40 mi (32–64 km) per hr, but tornadoes have be reported to move in a variety of directions and as fast as 73 mi (117 km) per hr—or to hover in one place.
	www.infoplease.com /ce6/weather/A0849078.html (423 words)

	Tornado! (Site not responding. Last check: 2007-10-12)
		Although tornadoes occur throughout the world, including India and Bangladesh, they are most intense and devastating in the United States--especially in Tornado Alley.
		Tornadoes are so common in Tornado Alley because of mountains to the west and the Gulf of Mexico to the south, explains meteorology professor Howard Bluestein.
		Tornadoes can strike at any time of day, but they are much more frequent in the afternoon and evening, after the heat of the day has produced the hot air that is a requirement of a tornadic thunderstorm (defined).
	weathereye.kgan.com /expert/tornadoes/tornado_main1b.html (249 words)

	Tornadoes - DAN'S WILD WILD WEATHER PAGE
		Alabama ranks 4th in the nation for the number of killer tornadoes, and the risk of tornadoes is higher in the Tennessee Valley.
		Tornadoes form in the updraft region of a thunderstorm.
		Since the tornado is forming in the updraft, there may be a low cloud slowly rotating in the Rain Free Base of the storm.
	www.wildwildweather.com /twisters.htm (545 words)

	Encyclopedia Uselessia -- Tornado (Site not responding. Last check: 2007-10-12)
		The word "tornado" comes from the Spanish or Portuguese verb tornar, meaning "to turn." The phenomenon appears in storms all around the world, most famously in a broad area of the American Midwest and South known as Tornado Alley.
		Tornadoes are developed from a severe thunderstorm, and sometimes happen as a result of a hurricane.
		Tornadoes are produced when cold air overrides a layer of warm air, focrcing the warm air to rise rapidly.
	www.greatplay.net /uselessia/articles/tornado.html (115 words)

	LiveScience.com - Tornado Science, Facts and History
		Tornadoes form where warm moist air is trapped underneath a layer of cold, dry air.
		Tornadoes can occur almost anywhere in the world, but the United States is the country with the highest frequency of tornadoes.
		The region is ideal for tornadoes, as dry polar air from Canada meets warm moist tropical air from the Gulf of Mexico.
	www.livescience.com /forcesofnature/050322_tornado_season.html (1047 words)

	Tornadoes
		A tornado is a violent rotating column of air extending from a thunderstorm to the ground.
		Tornadoes can happen at any time of the year and at any time of the day.
		In the southern states, peak tornado season is from March through May. Peak times for tornadoes in the northern states are during the summer.
	www.weatherwizkids.com /tornado.htm (895 words)

	Photos of tornadoes, wall clouds, gust fronts and severe storms
		Tornadoes are typically formed at the back edge of a wall cloud.
		The red color is caused by the tornado picking up dirt from a freshly plowed field that contained a large amount of clay.
		We were over 1/2 mile away and it was difficult to stand up due to the force of the wind.
	www.horsburgh.com /h_tornado.html (406 words)

	Tornado Alley by Jim Cornish
		This alley covers the middle part of the continent covering most the great plains that stretch between the Rocky Mountains in the west to the Appalachians Mountains in the east.
		Tornado Alley also extends from the gulf coast of the United States in the south to prairie provinces of Canada to the north.
		Tornadoes are more common in the central plains region of the United States because this is where warm, humid air masses from the Gulf of Mexico collide with cooler, drier air masses from Canada.
	www.cdli.ca /CITE/tornadoes_alley.htm (426 words)

	Tornado Alley Ink TORNADO ALLEY HOOPS
		On April 1, 2003 "Tornado Alley" was born and the children (from ages 7 to 20) came in a continuing stream.
		When the children are at Tornado Alley, the parents know that they are safe and are being watched by caring adults.
		For many children, Tornado Alley is a place where they can dream, escape the boredom of having nothing to do, or enjoy the camaraderie that comes with "belonging" to something that matters.
	www.tornadoalleyhoops.com /TornadoAlleyInk.html (12813 words)

	Tornado Safety
		The chances that a tornado will strike a building that you are in are very small, however, and you can greatly reduce the chance of injury by doing a few simple things.
		If a tornado "warning" is issued, it means that a tornado has actually been spotted, or is strongly indicated on radar, and it is time to go to a safe shelter immediately.
		A family in the April 8th, 1998 tornado in the Birmingham, Alabama area survived because a hutch toppled and was held up by the dining room table they were under.
	www.tornadoproject.com /safety/safety.htm (2200 words)

	Tornado Alley :Tornado and Storm chaser Facts, Pictures and Weather Information
		NEWS RELEASE: Tornado Tim is working with the Restoration project helping people prepare to be ready to rescue and restore those effected by severe natural disasters.
		Quote: "I continue to believe most tornado alley maps do not represent the most dangerous areas in the US correctly, and have been vague in defining them to the public which may become a serious safety issue in the future.
		Read why hiding under an overpass and using it for shelter during a tornado is a deadly mistake you must avoid.
	www.tornadochaser.net (263 words)

	CNN.com - Severe storms sweep central U.S. - May 30, 2004
		A state trooper saw a tornado on the ground in southern Washington County, Indiana, said a spokesman for the Indiana State Police in Sellersburg.
		The Weather Service had issued tornado warnings from eastern Texas north to Wisconsin and Minneapolis, Minnesota, and east to Ohio, and from the middle Mississippi River Valley to the Ohio River Valley, said CNN meteorologist Jacqui Jeras.
		The largest number of tornadoes to touch down in any 24-hour period came in what is known as "The Super Outbreak," which began in the afternoon of April 3, 1974, and continued for 23 hours.
	www.cnn.com /2004/WEATHER/05/30/weather.tornadoes (611 words)

	Tornado Alley (Site not responding. Last check: 2007-10-12)
		Northern >Illinois is really at the northern border of a donut shaped area >that encompasses the Great Plains and Midwest that receives a lot of >tornado activity because of the positioning of fronts and the jet >stream during the Spring in particular.
		The 1990 >Plainfield tornado resulted from a freak situation, where a weak back door >(from the North) cold front was positioned under the jet stream (also not >very strong) in just the right way to produce strong convection and >rotation.
		At that point of the storm (late in the storm), >the tornado was not touching the ground but was still very intense.
	www.newton.dep.anl.gov /askasci/wea00/wea00038.htm (630 words)

	Tornado, Severe Weather, Safety, State info., Statistics, Skywarn, Facts, Reports
		A tornado is a violently rotating column of air in contact with the ground.
		After studying houses damaged by high winds and tornadoes it has been found that often a small interior room, such as a closet or bathroom, remains intact after the house is destroyed.
		High winds like those generated by a tornado often lift the house off of the floor of the house, leaving behind the floor and the interior rooms.
	www.disastercenter.com /tornado.html (780 words)

	B.J. Thrower: Tornado Alley
		The west Tulsa tornado — classified as an F1 that caused some property damage including the destruction of several mobile homes — went back up in the clouds when it reached the river, and remained there while the storms passed over the Tulsa area.
		In 1978 one pitch-fl spring night, there was a tornado in the air 3 blocks from my house, reported by police who warned us by using their patrol car sirens because they were looking up at it.
		We had a F4 tornado on the late afternoon of April 24, 1993 — wrapped in rain so that it could not even be seen — that killed several people along I-244 on the northeast side of town.
	www.sfwa.org /members/Thrower/Tornado.html (1444 words)

	Tornadoes
		Tornadoes occur when a warm, humid air mass meets with a cool, dry air mass.
		Tornadoes cause much damage by this sheer force of wind, but they also have a strong updraft that can lift and carry objects.
		A tornado is a powerful storm which is created when moist, warm air gets trapped beneath a stable layer of cold, dry air within layer of warm, dry air.
	www.42explore.com /tornadoes.htm (623 words)

	FEMA For Kids: Disaster Connection - Kids to Kids
		Tornadoes can be very dangerous -- sometimes even deadly.
		Every state is at some risk, but states in "Tornado Alley" have the highest risk.
		Tornadoes can form any time of the year, but the season runs from March to August.
	www.fema.gov /kids/tornado.htm (141 words)

	Tornado Frequency in Tornado Alley
		Tour dates and base cities are selected to coincide with the highest frequency of tornadoes in Tornado Alley.
		Tornado season in Tornado Alley generally begins in March and ends in August.
		Tempest Tours is a proud sponsor of the TESSA 2006 Texas Storm Conference.
	www.tempesttours.com /tornado_frequency_tornado_alley.html (284 words)

	Tornado Alley
		Most tornadoes in the United States form in an area called "Tornado Alley".
		Storm chasers travel to this area because of the high concentration of tornadoes.
		Some of the tornadoes in the southern states such as Florida, South Carolina, and Georgia are caused by
	www.windows.ucar.edu /tour/link=/earth/Atmosphere/tornado/alley.html (173 words)

	NOBODY LEFT BEHIND: Disaster Preparedness for Persons with Mobility Impairments--Facts 1 (Site not responding. Last check: 2007-10-12)
		The disaster types that were randomly selected for this research project resulted in: six cases of flooding, five severe storms, four wildfires, three winter storms and one winter freeze, two tropical storms, two hurricanes, two tornados, one earthquake, an ice storm, heavy rains, and the 9/11 terrorist attacks.
		Tornados occur in all 50 states, however they are more frequent in “Tornado Alley” which includes Midwest states from the Texas Gulf coastal plains to northward through to eastern South Dakota.
		Our study looks at the tornado that hit the City of Hampton, Virginia in 1999 and the tornados from a severe storm in 2002 to strike Jefferson County, Texas.
	www.rtcil.org /fact1.htm (1460 words)

	ABC 7 News - ABC 7 Weather Investigation: D.C. Region Becoming Tornado Alley? (Site not responding. Last check: 2007-10-12)
		And not all of the recent, important tornadoes in this area were hurricane related, that is false.
		It's about being informed that this area is, in fact, tornado prone, and heeding the warnings when they are given, because some people are very cavalier about it and that can be deadly.
		Not nearly the tornadoes or flooding of the mid-west.
	www.wjla.com /news/stories/0505/228724.html (953 words)

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