61. 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.factmonster.com/spot/tornado1.html

Home U.S. People Word Wise ... Homework Center Fact Monster Favorites American Indian Heritage Month Thanksgiving Math Flashcards Geography Guide ... 2011 Calendar Reference Desk Atlas Almanacs Dictionary Encyclopedia ... FunBrain 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? A tornado is a dark funnel-shaped cloud made up of violently rotating winds that can reach speeds of up to 300 m.p.h. The diameter of a tornado can vary between a few feet and a mile, and its track can extend from less than a mile to several hundred miles. Tornadoes generally travel in a northeast direction (depending on the prevailing winds) at speeds ranging from 20-60 m.p.h. What Causes a Tornado?

62. CDC Tornadoes Information on terrorism and public health. Provided by the Centers for Disease Control and Prevention (CDC). http://www.bt.cdc.gov/disasters/tornadoes/

63. NCDC: Tornadoes > Climatology Summary of tornado climatology U.S. Tornado Climatology National Climatic Data Center Asheville, North Carolina http://www.ncdc.noaa.gov/oa/climate/severeweather/tornadoes.html

DOC NOAA NESDIS NCDC Search Field: NCDC Climate Monitoring Tornado Safety Help U.S. Tornado Climatology National Climatic Data Center Asheville, North Carolina Updated 10 April 2008 Overview Tornado Alley Timing Historical Records and Trends ... Links to Additional Information Overview Because a tornado is part of a severe convective storm, and these storms occur all over the Earth, tornadoes are not limited to any specific geographic location. In fact, tornadoes have been documented in every one of the United States, and on every continent, with the exception of Antarctica (even there, a tornado occurrence is not impossible). In fact, wherever the atmospheric conditions are exactly right, the occurrence of a tornadic storm is possible. More on the conditions necessary for tornado formation can be found at the NOAA National Severe Storms Laboratory Tornado Page In terms of absolute tornado counts, the United States leads the list, with an average of over 1,000 tornadoes recorded each year. A distant second is Canada, with around 100 per year. Other locations that experience frequent tornado occurrences include northern Europe, western Asia, Bangladesh, Japan, Australia, New Zealand, China, South Africa and Argentina. In fact, the United Kingdom has more tornadoes, relative to its land area, than any other country. Fortunately, most UK tornadoes are relatively weak. [ Encyclopaedia Britannica Article Regions of the world with increased likelihood of experiencing tornadoes.

64. Tornadoes Scholastic.com How many tornadoes hit the United States each year? Do tornadoes hit large cities or only in open areas? Meteorologists Barbara McNaught Watson and Al Peterlin answer students http://www2.scholastic.com/browse/article.jsp?id=4917

65. TORRO Independent and privately supported research body in the United Kingdom focusing on tornadoes and severe local storms. http://www.torro.org.uk/

If your browser fails to redirect then use this link to go to the TORRO home page

66. Tornadoes: MedlinePlus tornadoes are nature's most violent storms. They are rotating, funnelshaped clouds that extend from a thunderstorm to the ground. Their whirling winds can reach 300 miles per hour http://www.nlm.nih.gov/medlineplus/tornadoes.html

pttitle = ""; Skip navigation A service of the U.S. National Library of Medicine National Institutes of Health Home About MedlinePlus ... Contact Us Search MedlinePlus Health Topics ESPAÑOL Other Topics: A B C D ... All Topics Tornadoes URL of this page: http://www.nlm.nih.gov/medlineplus/tornadoes.html Tornadoes are nature's most violent storms. They are rotating, funnel-shaped clouds that extend from a thunderstorm to the ground. Their whirling winds can reach 300 miles per hour. They can strike quickly with little or no warning, devastate a neighborhood in seconds, and leave a path of damage over a mile wide and 50 miles long. Tornadoes can also accompany tropical storms and hurricanes as they move onto land. Although there are no guarantees of safety during a tornado, you can take actions to protect yourself. You should have a disaster plan . Being prepared can help reduce fear, anxiety and losses. Federal Emergency Management Agency Tornadoes are nature's most violent storms. They are rotating, funnel-shaped clouds that extend from a thunderstorm to the ground. Their whirling winds can reach 300 miles per hour. They can strike quickly with little or no warning, devastate a neighborhood in seconds, and leave a path of damage over a mile wide and 50 miles long. Tornadoes can also accompany tropical storms and hurricanes as they move onto land. Although there are no guarantees of safety during a tornado, you can take actions to protect yourself. You should have a disaster plan. Being prepared can help reduce fear, anxiety and losses.

67. USATODAY.com Everything about tornadoes explained by the experts. http://www.usatoday.com/weather/wtwistqa.htm

OAS_listpos = "PageCount,AdOps1,Top728x90,Zaplet1,FloatBottom,Bottom728x90,VerticalBanner,Poster3,PosterBig,Links1,Links2"; Search How do I find it? Subscribe to paper Home News ... Weather Weather Cars Event tickets Jobs Real estate ... Online degrees Find a forecast: OAS_AD("PosterBig"); OAS_AD("VerticalBanner"); Experts answer tornado questions Here are answers from tornado experts at the National Oceanic and Atmospheric Administration, including the National Weather Service, to tornado questions from readers. Tornado safety Q: Where is the safest place to go if a tornado hits near or in an amusement park? First answer by: Charles A. Doswell III, research meteorologist, NOAA National Severe Storms Laboratory, Norman, Okla. A: This is a very difficult problem and one that scares many of us in the research community. Tornadoes harm people primarily through flying debris, usually generated from the destruction of structures. In situations like amusement parks, sporting events, or any other large gathering of people, the problems are: an abundance of materials available to become airborne debris;

68. NWS Publications: Tornadoes Describes how tornadoes form, how many there really are, and what to do if one is coming toward you. http://www.nws.noaa.gov/om/brochures/trw.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 ) For full color graphic version click here (you need an adobe acrobat reader to view this - download a free copy now.) 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?

69. What_causes_tornadoes? A description of the special conditions that can cause a thunderstorm to become tornadic. http://www.weatherquestions.com/What_causes_tornadoes.htm

HOME CLOUD/PRECIP FCST MOVIE TEMPERATURE FCST MOVIE 2007 HURRICANES ... 2008 HURRICANES What causes tornadoes? Tornadoes form in unusually violent thunderstorms when there is sufficient (1) instability, and (2) wind shear present in the lower atmosphere. Instability refers to warmer and more humid than usual conditions in the lower atmosphere, and possibly cooler than usual conditions in the upper atmosphere. Wind shear in this case refers to the wind direction changing, and the wind speed increasing, with height. An example would be a southerly wind of 15 mph at the surface, changing to a southwesterly or westerly wind of 50 mph at 5,000 feet altitude. This kind of wind shear and instability is usually exists only ahead of a cold front and low pressure system . The intense spinning of a tornado is partly the result of the updrafts and downdrafts in the thunderstorm (caused by the unstable air) interacting with the wind shear, causing a tilting of the wind shear to form and upright tornado vortex. Helping the process along, cyclonically flowing air around the cyclone, already slowly spinning in a counter-clockwise direction (in the Northern Hemisphere), converges inward toward the thunderstorm, causing it to spin faster. This is the same process that causes an ice skater to spin faster when she pulls her arms in toward her body. Other processes can enhance the chances for tornado formation. For instance, dry air in the middle atmosphere can be rapidly cooled by rain in the thunderstorm, strengthening the downdrafts that are needed for tornado formation. Notice that, in virtually every picture you see of a tornado, the tornado has formed on the boundary between dark clouds (the storm updraft region) and bright clouds (the downdraft region), evidence for the importance of updrafts and downdrafts to tornado formation. Also, an isolated strong thunderstorm just ahead of a squall line that then merges with the squall line often becomes tornadic; isolated storms or more likely to form tornadoes than squall lines, since an isolated storm can form a more symmetric flow pattern around it and also have less competition for unstable air "fuel" than if it were part of a solid line of storms.

70. April 3, 1974 - The Tornado Super Outbreak Details on the Super Outbreak of tornadoes that spawned 148 tornadoes, including thirty F4 s and six F5 s, in one day. http://www.april31974.com/

71. Super Outbreak - Wikipedia, The Free Encyclopedia Encyclopedia article on the April, 1974 tornado outbreak which spawned the largest number of tornadoes ever recorded. http://en.wikipedia.org/wiki/Super_Outbreak

Super Outbreak From Wikipedia, the free encyclopedia Jump to: navigation search This article has multiple issues. Please help improve it or discuss these issues on the talk page It needs additional references or sources for verification Tagged since November 2009. Its tone or style may not be appropriate for Wikipedia. Tagged since November 2009. Super Outbreak (1974) Paths of the 163 tornadoes generated during the Super Outbreak. Date of tornado outbreak April 3–4, 1974 Duration ~18 hours Maximum rated tornado tornado Tornadoes caused 163 confirmed (Most ever in a single-day outbreak) Damages $3.5 billion (2005 dollars) Fatalities Areas affected Most of central and eastern North America Time from first tornado to last tornado Most severe tornado damage; see Fujita Scale The Super Outbreak is the largest tornado outbreak on record for a single 24-hour period. From April 3 to April 4, 1974, there were 163 tornadoes confirmed in 13 US states, including Illinois Indiana Michigan Ohio ... West Virginia , and New York ; and the Canadian province of Ontario The Super Outbreak of tornadoes of 3–4 April 1974 remains the most outstanding severe convective weather episode of record in the continental United States. The outbreak far surpassed previous and succeeding events in severity, longevity and extent.

72. Tornado – Wikipedia Das freie Lexikon bietet eine Einf hrung in die Thematik. http://de.wikipedia.org/wiki/Tornado

Tornado aus Wikipedia, der freien Enzyklopädie Wechseln zu: Navigation Suche Dieser Artikel behandelt den Wirbelsturm Tornado, weitere Bedeutungen unter Tornado (Begriffsklärung) Tornado, 1949 in Kansas (USA) Ein Tornado spanisch tornar „umkehren, wenden, drehen“, Partizip tornado tornear „wirbeln, drechseln“), auch Großtrombe Wind- oder Wasserhose , in den USA umgangssprachlich auch Twister genannt, ist ein kleinräumiger Luftwirbel in der Erdatmosphäre , der eine annähernd senkrechte Drehachse aufweist und im Zusammenhang mit konvektiver Bewölkung ( Cumulus und Cumulonimbus ) steht, was dessen Unterschied zu Kleintromben (Staubteufeln) ausmacht. Der Wirbel erstreckt sich hierbei durchgehend vom Boden bis zur Wolkenuntergrenze. Diese Definition geht auf Alfred Wegener (1917) zurück und ist in dieser Form heute noch allgemein anerkannt. Die Benennungen Wind- und Wasserhose engl. Waterspout ) bezeichnen im deutschen Sprachraum eine Großtrombe (Tornado im weiteren Sinne) über Land oder größeren Wasserflächen (Meer, große Binnenseen). Windhose ist dabei ein Synonym für einen Tornado im engeren Sinne, also über Land.

73. TORNADO PREPAREDNESS Gives tips of what to do in case of a tornado. http://www.hickmanco.com/ema/tornado.htm

Are You Ready for a Tornado? Prepare a Home Tornado Plan Pick a place where family members could gather if a tornado is headed your way. It could be your basement or, if there is no basement, a center hallway, bathroom, or closet on the lowest floor. Keep this place uncluttered. If you are in a high rise building, you may not have enough time to go to the lowest floor. Pick a place in a hallway in the center of the building. Assemble a Disaster Supplies Kit. First-aid kit and essential medications Battery-powered NOAA Weather radio, flashlight and extra batteries Canned food and can opener Bottled water (at least one gallon of water per person per day to last at least 3 days) Sturdy shoes and work gloves Written instructions on how to turn off your home's utilities. Conduct periodic tornado drills, so everyone remembers what to do when a tornado is approaching. Also include in the kit written instructions on how to turn off your home's utilities. Conduct periodic tornado drills, so everyone remembers what to do when a tornado is approaching. Stay Tuned for Storm Warnings Listen to your local radio and TV stations for updated storm information.

74. Tornado - Hands-on, Tornado DS Previews | GamesRadar Preview, by Kevin Schultz Tornado delivers the simplistic pleasure of total destruction in a way that s only comparable to crushing your little brother s city made of LEGO blocks. http://www.gamesradar.com/ds/tornado/preview/tornado-hands-on/a-2008072516505570

75. RAF - Tornado GR4 Tornado GR4 description, specifications, images, and list of squadrons. Includes links to some squadron pages. http://www.raf.mod.uk/equipment/tornado.cfm

Skip to main navigation Skip to page content Links/FAQ's Downloads ... Careers AGILE ADAPTABLE CAPABLE Home Role Organisation Current Operations ... Future Capability Tornado GR4/GR4A Roles The Tornado GR4 is a variable geometry, two-seat, day or night, all-weather attack aircraft, capable of delivering a wide variety of weapons. Specifications Engines: Two RB199 turbofans Thrust: 16,000lbs each Max speed: Length: Max altitude: Span: Aircrew: Armament: Storm Shadow, Brimstone, ALARM, AIM-9 Sidewinder, Paveway II, Paveway III, Enhanced Paveway, General Purpose Bombs, Mauser 27mm Save to 'Compare aircraft' Who uses the Tornado GR4/GR4A 9 Squadron RAF Marham 12 Squadron RAF Lossiemouth 14 Squadron RAF Lossiemouth 31 Squadron RAF Marham 617 Squadron RAF Lossiemouth 13 Squadron RAF Marham 15 (Reserve) Squadron RAF Lossiemouth 2 (AC) Squadron RAF Marham Details Please note: the Maximum speed stated above comes from the RAF Release to Service manual; which states 1.3 Mach, this may differ from BAE Systems specifications, however the RAF follow these guide lines) The Tornado GR4 is a variable geometry, two-seat, day or night, all-weather attack aircraft, capable of delivering a wide variety of weapons. Powered by two Rolls-Royce RB 199 Mk 103 turbofan engines, the GR4 is capable of low-level supersonic flight and can sustain a high subsonic cruise speed. The aircraft can fly automatically at low level using terrain-following radar when poor weather prevents visual flight. The aircraft is also equipped with forward-looking infrared and is night-vision goggle compatible, making it a capable platform for passive night operations. For navigation purposes, the Tornado is equipped with an integrated global positioning inertial navigation system that can also be updated with visual or radar inputs. The GR4 is also equipped with a Laser Ranger and Marked Target Seeker system that can be used for ground designation or can provide accurate range information on ground targets.

76. SATT 3.0 Information Informational site for Vortek s Site Assessment of Tornado Threat (SATT 3.0) software. Provides the user with a means of quickly and accurately displaying and analyzing tornado data for any portion of the United States, excluding Alaska. http://www.tornadothreat.com/TTMain.htm

EAI Info. SATT 3.0 National Regional Contact Us Order Now Figure 1. Annual Distribution By Intensity Figure 2. Annual Distribution by Time of Day Figure 3. Annual Distribution by Month Figure 4. Annual Distribution by Year Figure 5. Tornado Track Display SATT 3.0 The Site Assessment of Tornado Threat, Third Edition, (SATT 3.0 for Windows) software developed by Engineering Analysis Inc. (EAI), provides the user with a means of quickly and accurately displaying and analyzing tornado data for any portion of the United States, excluding Alaska. This Windows-based program contains all National Weather Service (NWS) data from 1950 to 2008 and is designed to be updated annually. Two versions of the SATT 3.0 software are currently available: National-the 48 contiguous states plus Hawaii Regional-Primary State plus all neighboring states With each version the user can obtain an analysis of all tornadoes passing within a specified radius of any given location, within the states included. The analysis provides both tabular and graphical output and includes a tabulation of tornadoes by year, month, time of day, and intensity. The annual coverage fraction (ACF), which is the average annual fraction of land area covered by tornadoes within the reference area, is included. (The ACF is the same as the annual probability of being struck by a tornado within the reference area.) A plot of tornadoes tracks, color-coded by intensity, with state boundaries indicated, is presented along with the most frequent direction from which tornadoes have approached the region of interest. Of special significance, both versions of SATT 3.0 have the capability to generate color-coded plots of the tornado threat for each of the states included.

77. 1970 Lubbock Tornado - Wikipedia, The Free Encyclopedia Encyclopedia article about the 1970 Texas tornado. http://en.wikipedia.org/wiki/Lubbock_Tornado

1970 Lubbock tornado From Wikipedia, the free encyclopedia   (Redirected from Lubbock Tornado Jump to: navigation search 1970 Lubbock tornado Date May 11, 1970 Time 9:35 pm Rating tornado Damages USD Fatalities 26 killed, Approximately 500 injured Area affected Central Lubbock, Texas The 1970 Lubbock tornado was a tornado event that occurred in Lubbock, Texas , on May 11, 1970. It was one of the worst tornadoes in Texas history, and occurred exactly 17 years to the day after the deadly Waco Tornado . It is also the most recent F5 tornado to have struck a central business district of a large or mid-sized city. Confirmed Total Confirmed Confirmed Confirmed Confirmed Confirmed Confirmed Contents Development Tornado Activity Begins Aftermath See also ... edit Development At 10AM on 11 May 1970, the SELS (Severe Local Storms unit) issued an outlook that stated that isolated thunderstorms were possible in the High Plains region of West Texas, and amended the outlook at 1:25 PM to include the possibility that some of the storms may become severe. Warm and dry conditions dominated the area throughout the afternoon; the temperature peaked at a high of 90°F (32°C) with moderate humidity. At 6PM, large cumulus clouds began to appear in the area, and at 6:30 the first echoes indicating thunderstorms began to appear on radar scopes in nearby

78. Tornado Konwent Tornado to og lnopolski zjazd mi o nik w post-apokalipsy. http://www.tornado.info.pl/

79. GameSpy.com Advertisement Provides information, news, and screenshots. http://ds.gamespy.com/nintendo-ds/tornado/

80. Tornado's Sito del gruppo Tornado di cosplay sulla Justice League. Offre gallerie fotografiche ed un forum. http://www.tornados.it

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