41. NWS Publications: Tornadoes Information about tornadoes from the National Weather Service. http://www.nws.noaa.gov/om/brochures/tornado.shtml

www.nws.noaa.gov Home News Organization Search NWS All NOAA Weather Services Aviation Climate Hydro, ... Questions/Comments? Tornadoes.... Nature's Most Violent Storms A PREPAREDNESS GUIDE Including Safety Information for Schools U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Weather Service September 1992 (NOAA, FEMA, The American Red Cross ) Tornado! Although tornadoes occur in many parts of the world, these destructive forces of nature are found most frequently in the United States east of the Rocky Mountains during the spring and summer months. In an average year, 800 tornadoes are reported nationwide, resulting in 80 deaths and over 1,500 injuries. A tornado is defined as a violently rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of 250 mph or more. Damage paths can be in excess of one mile wide and 50 miles long. Once a tornado in Broken Bow, Oklahoma, carried a motel sign 30 miles and dropped it in Arkansas! What causes tornadoes?

42. Facts About Tornadoes Recently I had this opportunity to learn about so many facts about tornadoes, in a science exhibition held in my university. I thought, why not share info with you guys http://www.buzzle.com/articles/facts-about-tornadoes.html

Home World News Latest Articles Escape Hatch ... Endless Buzz Facts about Tornadoes Recently I had this opportunity to learn about so many facts about tornadoes, in a science exhibition held in my university. I thought, why not share the info with you guys... Tornadoes - even the name, gives most people the shudders! Especially to those who happen to be natives of the United States, as this place is mostly frequented by these devastating phenomenons of nature. However, they can hit almost anywhere on the globe. Also known as twisters, as devastating they are, they are also one of the amazing creations of mother nature. Their existence stands for the fact that mankind do not posses the ability to gain a complete control over nature - a soul that is unbound and free. Many interesting facts about tornadoes , await you in the following. Facts about Tornadoes for Kids and Adults If viewed from the perspective of philosophy, the occurrence of tornadoes may be analogical to the union of two giant entities of the universe - the Earth and the Heaven. As a child I had read a story which narrated how Earth and Heaven were separated from each other by the Almighty. So may be Heaven pays occasional visits to his love at any time of the year. But such visits cost dearly to the human race, resulting in large scale destruction of objects that are essential for the existence of life. But as we say, 'everything is fare is love and war'... The tornado facts are as follows...

43. TornadoSquad.com, Tornado Videos,tornado Links,tornado Alley, Tornadoes Features tornado videos, links for tornadoes, kids corner, and storm talk. http://www.tornadosquad.com/

44. Weather Wiz Kids Weather Information For Kids Weather Wiz Kids is a fun and safe website for kids about all the weather info they need to know. It contains tools for weather education, including weather games, activities http://www.weatherwizkids.com/weather-tornado.htm

Tornadoes What is a tornado? A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of up to 300 mph. They can destroy large buildings, uproot trees and hurl vehicles hundreds of yards. They can also drive straw into trees. Damage paths can be in excess of one mile wide to 50 miles long. In an average year, 1000 tornadoes are reported nationwide. How do tornadoes form? 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. Click Here to learn more about tornadoes from NOAA.

45. Tornadoes | Natural Disasters And Weather Emergencies | US EPA tornadoes Prepare for a tornado before it strikes information to help you understand the dangers and what you can do before a disaster (information below). http://www.epa.gov/naturalevents/tornadoes.html

@import 'http://www.epa.gov/epafiles/s/epa.css'; Jump to main content. Natural Disasters and Weather Emergencies Contact Us Search: All EPA This Area You are here: EPA Home Natural Disasters and Weather Emergencies Tornadoes Tornadoes Prepare for a tornado before it strikes - information to help you understand the dangers and what you can do before a disaster (information below). Current watches and warnings. Recover from a tornado - recognize possible environmental hazards and what you can do to protect your and your family's health, and for commercial buildings and schools (information below). General (non-emergency) information about tornadoes from the National Oceanographic and Atmospheric Administration (NOAA). Many of the links below go to sites outside EPA. Tornadoes can strike with little or no warning. If you live in an area where tornadoes occur, prepare ahead of time to mitigate disaster from a tornado. Other sites related to preparedness Tornado hazards - Federal Emergency Management Agency Tornado preparedness - American Red Cross Make a plan for natural disasters - Ready.gov

46. Tornadoes Easier tornadoes are violent, whirling funnel-shaped windstorms that usually travel over land. When a tornado touches the http://www.42explore.com/tornadoes.htm

The Topic: Tornadoes Easier - Tornadoes are violent, whirling funnel-shaped windstorms that usually travel over land. When a tornado touches the ground, it can cause great destruction in its narrow path. Harder - Tornadoes, often called twisters, are the most violent of thunderstorms. A tornado over a body of water is called a waterspout. Tornadoes occur when a warm, humid air mass meets with a cool, dry air mass. This collision sometimes results in a powerful, swirling column of air. The tornado's swirling winds can exceed 300 mph. Tornadoes cause much damage by this sheer force of wind, but they also have a strong updraft that can lift and carry objects. Fortunately, most tornadoes are relatively weak; only a few are devastating. Storm Spotter's Guide : An Illustrated Guide to Identifying Severe Storms http://www.srh.noaa.gov/oun/skywarn/spotterguide.html

47. Tornado Severe Weather, Safety, Current Probabilities, Statistics, Skywarn, Fact tornadoes, weather watchers, fact sheet statistics for every state, and links to the Disaster Center states pages. http://www.disastercenter.com/tornado.htm

Tornado and Severe Weather Tornado Statistics for every State Alaska : Alabama : Arkansas : Arizona : California : Connecticut : Colorado : Delaware : Florida : Georgia : Hawaii : Idaho : Illinois : Indiana : Iowa : Kansas : Kentucky : Louisiana : Massachusetts : Maine : Michigan : Minnesota : Missouri : Maryland : Mississippi : Montana : North Carolina : North Dakota : Nebraska : Nevada : New Hampshire : New Jersey : New Mexico : New York : Ohio : Oklahoma : Oregon : Pennsylvania : Rhode Island : South Carolina : South Dakota : Tennesse : Tornado : Texas : Utah : Virginia : Vermont : Washington : Wisconsin : West Virginia : Wyoming : Please use our State bulletin boards for your State tornado reports The Enhanced Fujita Scale (EF Scale) The Disaster Center's Tornado Risk by State United States Tornadoes By Month and Year 1950 1997 Building a Safe Room Inside Your House ... The Journal of Storm Chasing Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Minnesota Michigan Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Virginia Vermont Washington West Virginia Wisconsin Wyoming Tornado Statistics for every State 1950 1995 How Does Your State Rank?

48. Tornadoes - Science - The New York Times Find articles and multimedia about tornadoes from The New York Times. http://topics.nytimes.com/top/news/science/topics/tornadoes/index.html

@import url(http://graphics8.nytimes.com/css/topic/screen/200704/topic.css); Log In Register Now Help Home Page ... Times Topics Search All NYTimes.com Tuesday, November 16, 2010 Science World U.S. N.Y. / Region ... Topics > Tornadoes E-MAIL Tornadoes Russell D. Perkins/The Daily Oklahoman via Associated Press A tornado, according to the National Oceanic and Atmospheric Administration, "is a violently rotating column of air that is in contact with the ground.'' Overall, the sprawling masses of moving air that make up hurricanes produce more large-scale destruction. But the sudden havoc and localized devastation that the funnel-shape cloud of tornadoes can wreak has made them perhaps even more fearsome. This was how Dan Barry described a visit to Greensburg, Kan., "population uncertain,'' a month after a tornado struck in May 2007: "Yes, a tornado nearly two miles wide really did mow through here one night last month. It really did kill 10 of the 1,450 residents. It really did destroy just about every house, business and church, as though determined to erase Greensburg, home of the World’s Largest Hand-Dug Well, from memory. And yes, all this in about the time it takes for a cup of coffee to cool." According to N.O.A.A., about 1,000 tornadoes hit the United States every year, killing on average 60 people. About 2 percent are recorded as force 4 or 5, the deadliest. The highest tornado wind speed ever recorded was 318 mph, measured on May 3, 1999 near Bridge Creek/Moore, Oklahoma. The greatest death toll came from the so-called "Tri-state tornado,'' which killed 695 people along its 219 mile track through Missouri, Illinois and Indiana on March 18, 1925.

49. Tornadoes Average number of tornadoes per year (1950–2004) 910 State with highest number of tornadoes per year (1950–1994) Texas (avg. 125) Top 5 states with highest incidence of http://www.infoplease.com/spot/tornado1.html

Site Map FAQ in All Infoplease Almanacs Biographies Dictionary Encyclopedia Spelling Checker Daily Almanac for Nov 16, 2010 Search White Pages Skip Navigation Home American Indian Heritage Month ... games, quizzes Editor's Favorites American Indian Heritage Month Thanksgiving Most Corrupt Countries in the World Conversion Calculator ... DK Daily Teach Search: Infoplease Info search tips Search: Biographies Bio search tips Share Tornadoes Facts and figures about twisters by Ann Marie Imbornoni Tornadoes Deadly U.S. Tornadoes Tornado Safety (Ask the Editors) Disaster Quiz Tornado Index Texas (avg. 125) Texas (134), Oklahoma (58), Kansas (56), Florida (51), Nebraska (43) Alaska (2), Rhode Island (9), Hawaii (31), Vermont (37), Oregon (87) Most tornadoes in one month: 543 (May 2003) Most tornado deaths in one year: Fewest tornado deaths in one year: Average No. of Tornado Deaths, Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Average No. of Tornadoes, Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Source: Storm Prediction Center at the National Weather Service Although tornadoes What Is a Tornado?

50. Tornado, Tornadoes, Tornado Pictures At LiveScience.com LiveScience.com explains tornado, tornadoes, tornado pictures, tornado information and pictures of tornadoes. http://www.livescience.com/tornadoes/

dartTag = 'general/home'; All About Tornadoes Tornadoes are the most powerful, unpredictable and destructive weather systems on Earth. The National Weather Service (NWS) defines a Tornado as a violently rotating column of air in contact with the earth’s surface (land or water) and commonly associated with a severe thunderstorm. A tornado generally occurs when high winds within a low pressure system (such as a thunderstorm) cause water vapor in the air to condense in to a condensation funnel cloud. Many less severe tornadoes are not even visible to the human eye. Major tornadoes usually become more visible when the strong winds within the funnel lift up dirt and debris off the Earth’s surface. Tornadoes are generally classified as either a land spout (a tornado on land), a water spout (a tornado that forms over water) or a gustnado (a small tornado caused by a strong downburst of wind from a thunderstorm). The average tornado has maximum wind speeds of about 112 mph or less, measures around 250 feet in width and travels approximately one mile before falling apart. Some of the most catastrophic tornadoes in recorded history have had winds in excess of 300 miles an hour (twice that of a category 5 hurricane), have measured more than 2 miles in girth, and have carved devastating paths of destruction miles and miles in length. For additional tornado facts and information , simply select any tornado picture , tornado article or other interactive tornado feature below.

51. FEMA: Tornado Tornado safety tips from the Federal Emergency Management Agency. http://www.fema.gov/hazard/tornado/

Skip to content FEMA.gov FEMA Mobile Site Contact Us ... Frequently Asked Questions or Additional Languages Search Advanced Search Home Apply for Assistance FEMA Audiences ... About FEMA Social Media FEMA Mobile Email Updates Facebook Twitter ... Print Preview Tornado Tornadoes are nature’s most violent storms. Spawned from powerful thunderstorms, tornadoes can cause fatalities and devastate a neighborhood in seconds. A tornado appears as a rotating, funnel-shaped cloud that extends from a thunderstorm to the ground with whirling winds that can reach 300 miles per hour. Damage paths can be in excess of one mile wide and 50 miles long. Every state is at some risk from this hazard. Some tornadoes are clearly visible, while rain or nearby low-hanging clouds obscure others. Occasionally, tornadoes develop so rapidly that little, if any, advance warning is possible. Before a tornado hits, the wind may die down and the air may become very still. A cloud of debris can mark the location of a tornado even if a funnel is not visible. Tornadoes generally occur near the trailing edge of a thunderstorm. It is not uncommon to see clear, sunlit skies behind a tornado. The following are facts about tornadoes: They may strike quickly, with little or no warning.

52. Worcestertornadoes.com: Home Official team site with news, schedule, and ticket information. http://www.worcestertornadoes.com/

53. Tornadoes - DAN'S WILD WILD WEATHER PAGE tornado tornadoes fujita scale severe weather rain free base wall cloud http://www.wildwildweather.com/twisters.htm

welcome to wildwildweather.com Tornado Weather Click the Map for a more detailed view. Why do some thunderstorms produce violent tornadoes while most do not? The answer is related to the wind . If the wind changes direction and gets stronger with height, it can cause a column of air to rotate. Think of a rotating column of air about 2 miles high and half a mile wide. Suddenly a thunderstorm updraft pulls this column upward. Now it's 3 miles high and a few hundred yards wide. When this happens the air spins up. Sit in a swivel chair and hold your arms out. Now have someone spin you around. As you spin bring your hands to your lap. Be careful doing this! The scientific term for this spinning up is conservation of angular momentum. It is this process that can take 50 mph winds and turn them into a tornado with 200 mph winds! Everything has to come together just right for a tornado to occur. More tornadoes occur in the United States than any other place in the world. Alabama ranks 4th in the nation for the number of killer tornadoes, and the risk of tornadoes is higher in the Tennessee Valley. Texas and Oklahoma have many more tornadoes than we do, here in the Tennessee Valley, ours tend to be more deadly. The worst tornado disaster occurred on March 21, 1932. Over 300 people were killed in the state during 2 waves of tornadoes that day.

54. 1979 Red River Valley Tornado Outbreak - Wikipedia, The Free Encyclopedia Encyclopedia article about the 1979 tornadoes that struck Wichita Falls, Texas and other towns in Texas and Oklahoma. http://en.wikipedia.org/wiki/Red_River_Valley_Tornado_Outbreak

1979 Red River Valley tornado outbreak From Wikipedia, the free encyclopedia   (Redirected from Red River Valley Tornado Outbreak Jump to: navigation search 1979 Red River Valley tornado outbreak Destruction in Wichita Falls, Texas after the tornado. Date of tornado outbreak April 10–11, 1979 Duration 2 days Maximum rated tornado tornado Tornadoes caused 59 confirmed Damages unknown Fatalities Areas affected Mississippi Valley Time from first tornado to last tornado Most severe tornado damage; see Fujita Scale The 1979 Red River Valley tornado outbreak was a tornado event that occurred on April 10, 1979 near the Red River Valley . It's most noted for the F4 tornado that hit Wichita Falls, Texas and is commonly referred to as " Terrible Tuesday " by many meteorologists. Additional tornadoes were reported across the Southern Plains as well as in the Mississippi River Valley on April 10-April 11, 1979. Contents Formation of the tornadoes Wichita Falls Damage Tornado table ... edit Formation of the tornadoes A deepening low pressure system formed in Colorado as a warm front lifted north pulling warm, moist, unstable air. There was strong upper level dynamics all coming together to produce strong tornado-producing supercells. In the early afternoon hours, three

55. Tornado History Project: Maps And Statistics Searchable database of all US tornadoes from 1950-2006. Includes statistics and maps for every tornado, including path information. Read eyewitness accounts or submit your own. http://www.tornadohistoryproject.com/

56. TORNADOESBLUES.COM The tornadoes have been together for well over a dozen years, taking on a few different forms over the years, but always with a core of Dan Berkowitz (bass), Bob Goffstein (guitar http://tornadoesblues.com/

57. Tornadoes - Resources On The Effects Of Tornados On Human Health Are You Ready? tornadoes FEMA.gov; NWS/SPC Watch, Warning, Advisory Display National Weather Service, National Oceanic and Atmospheric Administration http://sis.nlm.nih.gov/enviro/tornados.html

58. Tornadoes United States Search and Rescue Task Force. tornadoes. One of the most destructive natural phenomena, tornadoes are swirling winds that spin at phenomenal speeds of up to 400 mph. http://www.ussartf.org/tornadoes.htm

United States Search and Rescue Task Force Tornadoes One of the most destructive natural phenomena, tornadoes are swirling winds that spin at phenomenal speeds of up to 400 mph. Like hurricanes, they are caused by severe low pressure zones that attract winds with force. They have relatively small bases, a fact which greatly magnifies their destructive power. Tornadoes are difficult to predict and often strike without warning. Meteorologists expect to be able to predict a tornado in the near future. Tornadoes may range in width from several hundred yards to more than one mile across. Although tornadoes occur throughout most of the United States, areas in the Midwest and South are particularly susceptible to tornado activity. When a tornado is coming, you have only a short amount of time to make life-or-death decisions. Advance planning and quick response are the keys to surviving a tornado. Waterspout - Waterspouts are tornadoes over water which draw up large columns of water. If a waterspout moves from sea to shore, expect fish and other sea creatures to rain down! BEFORE Conduct tornado drills each tornado season.

59. Answers.com - Tornadoes Questions Including "What Is The Difference Between Hurr tornadoes Questions including What is the difference between hurricanes and tornadoes and How can you protect yourself from a tornado http://wiki.answers.com/Q/FAQ/2514

60. Tornadoes Whether it's a slender, graceful tube or a massive, roaring wall of cloud, the tornado is among the most fascinating and frightening of atmospheric phenomena. http://www.ucar.edu/communications/factsheets/Tornadoes.html

UCAR Communications Fact sheets Search Tornadoes Whether it's a slender, graceful tube or a massive, roaring wall of cloud, the tornado is among the most fascinating and frightening of atmospheric phenomena. On average, about 1,000 tornadoes touch down in the United States each year, by far the highest frequency reported for any nation in the world. However, U.S. death and injury tolls have dropped considerably in recent decades due to better warnings. Scientists at NCAR and elsewhere are trying to unravel the causes of these evanescent whirlwinds. Not all tornadoes are alike. At left is an example of the tornadoes often called "landspouts," which tend to be relatively weak. This one was photographed near Denver on 30 June 1987. Below is a powerful tornado that struck in the Texas Panhandle on 2 June 1995. Such violent twisters originate from supercell thunderstorms and occur most often in the central and eastern United States. Photo by Harald Richter. Virtually all tornadoes develop out of thunderstorms. Dust devils, the rotating columns of dust you might see on a hot, sunny day, are only distant cousins of tornadoes. Hurricanesfar larger and more complex systems that develop over the tropical oceanare another distant relative. All of these are marked by rising warm air and rotation (usually counterclockwise). Strong thunderstorms tend to form on a boundary between air masses, such as a cold front, that pushes surface air upward. Moisture in the warm air adds to the air's potential buoyancy.

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