Geometry.Net - the online learning center
Home  - Basic_T - Tornadoes
e99.com Bookstore
  
Images 
Newsgroups
Page 3     41-60 of 72    Back | 1  | 2  | 3  | 4  | Next 20
A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

         Tornadoes:     more books (100)
  1. Storm Chasers: On the Trail of Deadly Tornadoes (High Five Reading) by Matt White, 2002-05
  2. Weather Channel#4: Tornadoes by Sally Rose, 1999-05-01
  3. Tornadoes (High Interest Books) by Luke Thompson, 2000-09
  4. Winds of Fury, Circle of Grace: Life After the Palm Sunday Tornadoes by Dale Clem, 1997-04
  5. Big Weather: Chasing Tornadoes in the Heart of America (Owl/John MacRae Books) by Mark Svenvold, 2006-05-02
  6. Our Powerful Planet: The Curious Kid's Guide to Tornadoes, Earthquakes, and Other Phenomena (Lobster Learners) by Tim O'Shei, 2008-10-30
  7. Why Why Why Do Tornadoes Spin? by Camilla de la Bedoyere, Catherine Chambers, et all 2008-07
  8. Eye Of The Storm: Inside The World's Deadliest Hurricanes, Tornadoes, And Blizzards by Jeffery Rosenfeld, 2003-07-04
  9. Tornadoes (What on Earth) by Helen Orme David Orme, 2006-10-01
  10. Hurricanes and Tornadoes (Wild Weather) by Angela Royston, 2009-09-01
  11. Tornadoes (Pebble Plus) by Mari Schuh, 2009-08-15
  12. Tornadoes (Nature's Fury) by Cari Meister, 2000-03
  13. Plains Outbreak Tornadoes: Killer Twisters (American Disasters) by Victoria Sherrow, 1998-11
  14. Tornadoes (Extreme Weather) by Liza N. Burby, 1999-08

41. The Cause Of Tornadoes.
tornadoes are caused by clouds rising and creating a vacuum below them.
http://www.nov55.com/tor.html
Science is Broken
Gary Novak
Independent Scientist
Science Home
Basic Reality
Science is Broken

Why Truth
...
Fluoride

The Cause of Tornadoes
Vortexes are created by a fluid rushing in a horizontal direction. This effect is readily observable with whirlpools in a river. Such a horizontal rush of air is consistent with the characteristics of tornadoes. Tornadoes are caused when a cloud of the right size precipitates rapidly releasing heat, which causes it to rise, and creates a vacuum under it. Air rushing under it creates the vortex. It is known that a sudden drop in air pressure precedes tornadoes. The pressure drop is caused by a cloud near the ground rising rapidly creating a partial vacuum below it. The vacuum seems to be quite noticeable, as persons who were near tornadoes often mention it. Precipitation releases as much heat as evaporation absorbs. But precipitation tends to be much faster than evaporation. So a very large amount of heat is released when a cloud precipitates. Heat of course causes air to rise. When a cloud near the ground rises, it creates a partial vacuum under it. The cloud must be the right size for a tornado to occur. A very large cloud would not precipitate uniformly, so the whole cloud would not rise at once. A very small cloud would not produce enough precipitation or heat to create a large enough vacuum for a tornado to form.

42. VAEmergency.com > Threats & Emergencies > Tornadoes
When it comes to tornadoes, there s no such thing as a tornado season. tornadoes can strike anywhere, anytime, and you need to know the drill.
http://www.vdem.state.va.us/threats/tornado/index.cfm
Skip to Content Online Services Commonwealth Sites Help ... Governor Search Virginia.gov: Home Threats Wireless How can we make this site better?
Let us know ...
Tornadoes Tornado Home Tornado Basics Preparing for Tornadoes Responding to Tornadoes When it comes to tornadoes, there's no such thing as a "tornado season." Tornadoes can strike anywhere, anytime, and you need to know the drill. There are simple, low-cost steps families can take to be ready: get a kit make a plan and stay informed . Visit the Ready Virginia Web site for more about these three important steps.
The Statewide Tornado Drill was held on March 18, 2008
More than 330,000 Virginians from across the Commonwealth participated in the annual Statewide Tornado Drill. If you didn't participate, it's never too late to hold your own tornado drill Did you participate in the statewide tornado drill but didn't register? It's not too late register now to let us know that you participated.

43. Twister!
This online lesson explores the basics of tornadoes. This lesson Challenges students to use real-time data to predict today s tornadoes.
http://weathereye.kgan.com/expert/tornadoes/lesson_plan.html
Tornadoes: Lesson Plan This on-line lesson explores the basics of tornadoes. This lesson:
  • Shows how tornadoes form. Talks about tornado energy forms and sources. Discusses new ways to predict tornadoes. Discusses tornado safety, including ways to build stronger houses. Challenges students to use real-time data to predict today's tornadoes. Students can then check back the next day to see how accurate their forecast turned out to be. Offers an on-line quiz that is automatically graded. The computer can automatically send you the results if the student enters your e-mail address. Students can also print out the results and submit this to you.
Grade Levels: 6 to 12
Prerequisites: None
Time Needed to Complete: 60 to 90 minutes. Special Thanks:
We thank the staff the the University of Wisconsin's National Institute for Science Education, which allowed us to adapt this lesson for you. Check out the Why Files for other great activities from the NISE. Lesson Objectives:
  • Learn the basics of tornadoes Explore forms of energy Discover why some homes are stronger than others Use decision-making and analysis skills to predict where tornadoes are most likely.

44. Tornadoes
tornadoes form from severe thunderstorms. They have a very high energy density which means that they affect a small area but are very destructive to that
http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/tornado.html
Tornadoes
Picture of a May 11, 1991, tornado in Cimarron County, Oklahoma
Click on image for full size ( 65K GIF
© Greg Stumpf Tornadoes form from severe thunderstorms . They have a very high energy density which means that they affect a small area but are very destructive to that area. They also don't last very long which makes it hard to learn about them. Since they're hard to study, they're also hard to forecast . People know even less about tornadoes, which is why there are a lot of different myths that aren't true. Tornadoes can occur anywhere in the world. About 75% of them happen in the United States, most in an area know as Tornado Alley . There are also some other interesting facts about tornadoes. People who are interested in tornadoes sometimes become spotters for their community. Sometime people go out to Tornado Alley to chase tornadoes! After a tornado touches down, scientists try and figure out how strong it was by using the Enhanced Fujita Tornado Scale
See Another Tornado (203K GIF)

Image provided courtesy of Chris Vincent and Eric Bucsela
Last modified May 15, 2008 by

45. Introduction To Tornadoes
A tornado (from the Spanish tronada , meaning thunderstorm) is a violently rotating column of air rising up into a cloud. A thunderstorm is the first step
http://movies.warnerbros.com/twister/cmp/tornadointro.html
A tornado (from the Spanish "tronada", meaning thunderstorm) is a violently rotating column of air rising up into a cloud. A thunderstorm is the first step in the creation of a tornado. A thunderstorm happens when there is moisture in the atmosphere, a lifting force causing air to begin rising, and unstable air that will continue to rise once it starts. Then, if other conditions are right, the thunderstorm may spin out one or more tornadoes.
All thunderstorms are characterized by updrafts , rising air currents which supply the warm, humid air that fuels thunderstorms; sometimes, however, the column of rising air becomes a vortex a funnel cloud, or, if it reaches the ground, a tornado.
A tornado is often located at the edge of an updraft, next to air coming down from the thunderstorm with falling rain or hail. (This explains why a burst of heavy rain or hail sometimes announces a tornado's arrival.) As air rises from the ground in the tornado's vortex, a low pressure area is created near the ground. Air rushes to fill this area, causing additional damage to areas not directly hit by the tornado.
As air rushes into the vortex, its pressure lowers, cooling the air. This cooling condenses water vapor in the air into the tornado's familiar funnel-shaped cloud. As the swirling winds pick up dust, dirt, and debris from the ground, the funnel turns even darker. (Twisters that pick up little dirt can retain their white, cloud coloration, and some have taken on a red hue by picking up red dirt.)

46. ESRL : PSD : Tornados In The Boulder Area
Local tornados and funnel clouds from 1968 to present (list not complete) tornadoes in Colorado 19531990. Total 826 Average/year 21 Greatest 58 (in
http://www.cdc.noaa.gov/Boulder/tornado.html
U.S. Department of Commerce NOAA Research Search PSD:
FAQs
People Publications Skip navigation ...
Physical Sciences Division
Site navigation:
  • About
    Boulder regional and Colorado Tornado info
    Local tornados and funnel clouds from 1968 to present (list not complete):
    YEAR MON DAY TIME MAG TYPE COMMENTS AND LOCATION Sep tornado Boulder county .1 mile 15' wide May tornado Boulder county .1 mile 45' wide Jul funnel over Westminster Jun funnel S of Boulder Jun funnel E or SE Boulder Jun tornado 8m se Longmont 8minutes touchdown Jun tornado 1 1/2 miles east Lafayette brief touchdown May tornado north of longmont 1/2 mile path; 15 yards May funnel 10miles NE Boulder Apr tornado Boulder County 5.7 miles 6' wind Oct tornado Boulder County 1.5 miles 15' wind near 6500 Arapahoe Jul tornado 2 small tornados east of Rocky Flats Jun tornado between and Broomfield .5mi 50ft

47. April 3, 1974 - The Tornado Super Outbreak
The Super Outbreak of tornadoes that spawned 148 tornadoes including 30 F4 and 6 F5. Learn more about that incredible day.
http://www.april31974.com/
Home Why the outbreak occured Tornado Pictures and Damage Outbreak Statistical Data ... Screen play about the outbreak by Chris Dalton Incredible Radio Broadcast as Dick Gilbert tracks an F4 tornado in his helicopter. The Tornado Videos on Youtube Fly the paths of the tornadoes using Google Earth courtesy of the University of Michigan. Tom Wills, Chief Meteorologist at WAVE3 in Louisville, Kentucky Remembers the day. Tornado and Weather Experiments My Thank You's Read first hand eye witness accounts of the super outbreak and even add your own in our Guestbook Join Our e-mail list and I'll notify you whenever I update the web site!
Send me an E-mail

scott@april31974.com
Newspaper Article on Web Site Other Tornado Links NOAA Tornado FAQ Fujita Scale Texas Tech Wind Research Sayler Park Tornado ... Ball State Storm Chasers Weather Channels' Meterologist Kim Perez story on her first hand encounter with a F5 tornado in Sayler Park, Ohio The forecast for Wednesday April 3, 1974 was for showers on the East coast and for thunderstorms across the Midwest. In the heavens, a storm of an overwhelming magnitude was forming. Children went to school, people went to work and lives went on as normal until the second worst storm of the 1900's struck. Tornadoes broke across the heartland with such an intensity and frequency never seen before in the United States. Homes and schools destroyed. Loved ones lost. This site looks at the events of that day .This site is dedicated to the 315 people who lost their lives in this storm and to the over 5,000 people who were injured.

48. TORNADOES
This site contains all of the Nebraska tornado data beginning with 1950. There are graphs, maps, tables, and links to severe weather information.
http://www.hprcc.unl.edu/nebraska/TORNADOES.html
TORNADOES This site contains all of the Nebraska tornado data beginning with 1950. There are graphs, maps, tables, and links to severe weather information.A Link to U.S. tornado data and information is also included. NEBRASKA TABLES: Hourly Statistics, 1950-2006 Total Number for each County, 1950-2006 Monthly and Annual Totals, 1950-2006 Tornadoes Ranked by County Totals, 1950-2006 ... Year 2002 Listing of Nebraska Tornado Locations GRAPHS: Annual Frequency Line Graph, 1950-2006 Annual Frequency Bar Graph, 1950-2006 Total # of Tornadoes by Month 1950-2006 Hourly Frequency Numbers, 1950-2006 ... Average Monthly Totals 1950-2006 MAPS: Map of Nebraska Tornadoes in Year 2006 Map of All Tornadoes in Nebraska (1950-2005) Map of All Tornadoes in Nebraska (1950-2004) Map of All Tornadoes in Nebraska (1950-1959) ... Density of Tornadoes in Nebraska (1953-1999) STORM CHASE RESOURCES: Nebraska Storm Chase Nebraska Vortex Intercept Team The Weather Shopping Mall TORNADO SAFETY AND TORNADO EDUCATION Preparedness Guide Fujita Scale Tornado Myths Nebraska Tornado Facts ... Building a Safe Room NOTE: UNITED STATES SEVERE WEATHER: go to the U.S. Severe Weather page

49. FOXNews.com - Missing Arkansas Family Dog Returns Three Weeks After Tornadoes -
Missing Arkansas Family Dog Returns Three Weeks After tornadoes, Arkansas family dog reported missing after devastating tornadoes returns home three weeks
http://www.foxnews.com/story/0,2933,332208,00.html
var photoImgs = []; var photoRefs = []; photoRefs[0] = new largePhoto('343816/4_21_020808_bush_helicopter.jpg','Feb. 8: Marine One, with President Bush aboard, takes an an aerial tour of the tornado damage near Lafayette, Tenn.','AP',450,350); photoImgs[0] = new mainPhoto('343816/4_61_020808_bush_helicopter.jpg',' AP'); var d_sitezone = "fnc/us"; var d_nameValue = "ptype=story;pageId=346517;col=;kw=bush+tour+tornado"; We Report. You Decide. SEARCH UREPORT Send us your video, ... photos and news On FOX News CHANNEL: View Schedule get_a(728,90,"top");
U.S.
SEE MORE - Sept. 11 - Crime - Education - Supreme Court Send news tip to FOXNews.com SUBMIT FOXNEWS.COM HOME U.S.
Missing Arkansas Family Dog Returns Three Weeks After Tornadoes
Monday, February 25, 2008

50. Tornadoes Theme Page
The primary focus of the Community Learning Network (CLN) is to help K12 teachers integrate Information Technology into their classrooms.
http://www.cln.org/themes/tornadoes.html
Tornadoes Theme Page Below are the CLN "Theme Pages" which supplement the study of tornadoes. CLN's theme pages are collections of useful Internet educational resources within a narrow curricular topic and contain links to two types of information. Students and teachers will find curricular resources (information, content...) to help them learn about this topic. In addition, there are links to instructional materials (lesson plans) which will help teachers provide instruction in this theme.
Natural Disasters
General Tornadoes Resources Here are a number of links to other Internet resources which contain information and/or other links related to tornadoes. Please read our
(A) Comprehensive Glossary of Weather Terms for Storm Spotters
This glossary contains weather-related terms that may be either heard or used by severe local storm spotters or spotter groups.
EarthWatch Weather On Demand
A graphic intensive site showing satellite and radar weather pictures for North America. At this page, you can choose detailed, current weather images of Canada. The StormWatch button at the top of the page is for the US only.
[The] Fujita Scale
"The Fujita Scale (also known as the Fujita-Pearson Scale) is used to rate the intensity of a tornado by examining the damage caused by the tornado after it has passed over a man-made structure." The page also has many links to tornado resources.

51. About Tornadoes : Weather Underground
A tornado is a violently rotating column of air which descends from a thunderstorm to the ground. No other weather phenomenon can match the fury and
http://www.wunderground.com/tornadoFAQ.asp
GA_googleAddSlot("ca-pub-0983527230240367", "300x250_ROS"); Mobile iPhone Find the Weather for any City State or ZIP Code , or Airport Code or Country Features: Wunder Photos NEXRAD Radar Regional Radar Zoom Satellite ... Personal Weather Stations Email: Password: Preferences Weather Email Weather Radio Forecast Flyer
Maps
International
Information
Vacation Deals
  • Save On Vacation Condo Rentals Save money with Timeshare rentals
  • Condos and Vacations
  • Miami Condos Condos Denver Condos Beach Towels
  • Tickets and Technology
  • VOIP Phone Systems Disney Tickets Event and Concert Tickets Walt Disney World Tickets
  • Real Estate Guide
  • Homes For Sale
  • Hot Travel Savings
  • Car Rentals Hotels Airline Tickets Las Vegas Travel Deals
  • Real Estate
  • Homes For Sale Foreclosures Homeowners Insurance
  • Financial Advice on...
  • Foreclosure Bankruptcy Depression Jobs
  • Short Funny Stories
  • Stories
  • How To Save Money On...
  • Real Estate Travel Deals Hotel - Discount Directory Jewelry ...
    Mortgage Loans
  • Tickets and Worldwide Attractions
  • Disney Tickets Tours and Tickets
  • Canadian Pharmacy
  • Canada Pharmacy
  • Cheap Hotels
  • Cheap Hotel
  • Find Jobs In Your City
  • Jobs
  • Condos for Sale
  • Condos for Sale Playa del Carmen Condos Wholesale Flowers
  • College Students
  • Fraternity Sorority Puerto Escondido
  • Google Search Search the Net!

    52. NOVA | Hunt For The Supertwister | Rate Tornado Damage | PBS
    In this interactive, use the Fujita Scale of tornado intensity to assess the level of destruction left in the wake of actual tornadoes.
    http://www.pbs.org/wgbh/nova/tornado/damage.html
    var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
    Rate Tornado Damage
    Hunt for the Supertwister homepage

    This feature requires Flash, a free software plug-in, and JavaScript. Install Flash or see this feature's Non-interactive version Forecasters and researchers following a developing hurricane can accurately measure and rate its strength soon after it begins by collecting data from storm-hunting airplanes, radars, and satellites. But experts have no similar way to judge a tornado's force before or during its touchdown, as tornadoes arise too quickly and are too dangerous to approach by airplane. Instead, after a tornado hits, the U.S. National Weather Service uses a rating system it adopted in 1973 called the Fujita Scale. Devised by meteorologist Theodore Fujita in 1970, the F-scale enables experts to estimate a tornado's maximum wind speed in relation to the single most destructive thing it did. In this interactive, use the F-scale to examine and rate the destruction caused by several recent tornadoes. To launch the interactive Lexi Krock
    Hunt for the Supertwister homepage
    NOVA homepage

    53. Tornadoes & Thunderstorms
    Thunderstorms tornadoes Hurricanes Blizzards Winter Weather Clouds Predict the weather!
    http://eo.ucar.edu/webweather/thunderhome.html
    [Hurricanes] [Clouds] [Predict the weather! [Hurricanes] [Clouds] [Predict the weather!

    54. Iowa Homeland Security And Emergency Management
    Read more about tornadoes at NOAA s Storm Prediction Center. A tornado watch is issued by the National Weather Service when tornadoes are possible in
    http://www.iowahomelandsecurity.org/asp/resource_room/FactSheetTornado.asp

    55. Facts On Tornadoes In NSW
    tornadoes occur more commonly in NSW than most people would expect. The Bureau of Meteorology s database records 364 tornadoes across NSW from 1795 to June
    http://www.bom.gov.au/weather/nsw/sevwx/tornadofact.shtml
    Home About Us Contacts Help ... Feedback SEARCH Global Australia NSW Vic. ... Registered User Services
    Facts on Tornadoes in NSW
    Tornadoes occur more commonly in NSW than most people would expect. The Bureau of Meteorology's database records 364 tornadoes across NSW from 1795 to June 2003. Most tornadoes in NSW occur in late Spring and Summer but they have been known to occur at all times of the year. Tornadoes range in size from a few tens of metres across, up to around one kilometre in diameter. Because of this, damage is normally restricted to a small area, but is very intense. Tornadoes are thought to be formed by the interaction between regions of strong updrafts and downdrafts of air within severe thunderstorm clouds. Two views of the same tornado near Gilgandra, NSW on 29 September 1996. Tornadoes are ranked using the Fujita F-scale which estimates wind speed based on the extent and severity of damage. Below is the Fujita scale with respective approximate wind speeds. F-Scale rating Wind speed (km/h) Tornadoes seldom exceed F2 in Australia, but these are still quite damaging and dangerous. One of the highest wind speeds ever actually recorded in a tornado (using Doppler radar) was over 450 km/h in Oklahoma, USA in 1999. Stronger winds are evident from the examination of the impact of many tornadoes, particularly in the USA.

    56. NOAA News Online (Story 345)
    The most impressive and devastating tornado outbreak in the 20th century, The outbreak lasted 16 hours and produced a total of 148 tornadoes across 13
    http://www.noaanews.noaa.gov/stories/s345.htm
    NOAA News NOAA Home Page
    TORNADOES OF THE 20TH CENTURY
    NOAA's Storm Prediction Center in Norman, Okla., have prepared a list of some of the more notable tornado outbreaks that occurred in the United States during the 20th century. The summary lists the tornadoes by decade and notes the technological and policy improvements that resulted. "For meteorologists who study tornadic storms either through forecasting or research or storm chasing, there are a number of memorable tornadoes or tornado outbreaks during the 1900s," said Dan McCarthy, warning coordination meteorologist for the Storm Prediction Center. "Many meteorologists are in the profession because of a certain outbreak or tornado that spurred their curiosity, driving them to the science." Technological advancements in the second half of the century have contributed to better, more accurate severe weather watches and warnings from the National Weather Service, ultimately saving countless lives. The biggest advancement for severe weather (forecasting was the development of Doppler radar. NOAA scientists and other researchers took the airborne radar developed by the U.S. military during World War II and applied it to weather forecasting and severe storm identification. The ultimate result was the Next Generation Radar (NEXRAD) Doppler weather radar system currently in use.

    57. Rescuers, Family Cope With Fatal Tornadoes In South : NPR
    Feb 6, 2008 It was a day of rescue and recovery in Arkansas and other Southern states, as officials worked their way through the wreckage of last
    http://www.npr.org/templates/story/story.php?storyId=18740404

    58. Tornadoes
    tornadoes are one of nature s most violent storms. tornadoes come in all shapes and sizes and can occur anywhere in the U.S. at any time of the year.
    http://www.hhs.gov/disasters/emergency/naturaldisasters/tornadoes/index.html
    Skip Navigation Improving the health, safety, and well-being of America Frequent Questions Search: Disasters and Emergencies Font Size     Print     Download Reader   HHS Home Disasters Home Natural Disasters Disasters Home ... Newsroom
    Tornadoes
    Overview
    What is it? Tornadoes are one of nature's most violent storms. Tornadoes come in all shapes and sizes and can occur anywhere in the U.S. at any time of the year. In the southern states, peak tornado season is March through May, while peak months in the northern states are during the summer..(NOAA) Learn more Prepare For Families For Business For Practioners, Clinicians and Responders Worker

    59. Chasing Tornadoes @ National Geographic Magazine
    The tornado seems to be standing still too, not moving one way or the other. It takes him a fearsome minute to realize what that means—that the deadly storm
    http://ngm.nationalgeographic.com/ngm/0404/feature1/
    Chasing Tornadoes
    Step into the world of writers and photographers as they tell you about the best, worst, and quirkiest places and adventures they encountered in the field
    Browse through images from our online-exclusive photo gallery.
    Mighty Winds
    By Priit J. Vesilind Photographs by Carsten Peter
    Stalking the funnel clouds that rip through America's heartland, a National Geographic team gets in close for a terrifying look at the workings of the deadly storms.
    Read or print the full article
    "Should I turn the lights and the TV off?" Lynette asks. She hasn't seen the storm.
    "No, no! We have to go now!" They leave everything but a mobile phone.
    Photographer Carsten Peter hangs halfway out the window of the other speeding car, which is driven by veteran storm chaser Gene Rhoden. With them is another kind of probe, a pyramid-shaped aluminum casing loaded with a video and three 35-mm still cameras. Tinman, the team calls it, based on the character from The Wizard of Oz.
    The chasers can hear the tornado's jet engine roar and see it snapping power poles as they veer east onto a paved road, past the Geyers' farm and directly into the path of the funnel. Tim skids to a halt to make a drop. "We don't have time! We don't have time!" Pat yells. The monster is plowing up ground only a hundred yards away, and the inflow wind is revving up as Tim leaps out just long enough to deposit a probe before scrambling back in. As the chasers speed away, they can see debris roaring in above them: Nails, wire, two-by-fours whip by in winds that will soon reach 200 miles (300 kilometers) an hour.

    60. Tornado - Wikipedia, The Free Encyclopedia
    A tornado in central Oklahoma. The tornado itself is the thin tube reaching from the cloud to the ground. The lower part of this tornado is surrounded by a
    http://en.wikipedia.org/wiki/Tornado
    Tornado
    From Wikipedia, the free encyclopedia
    Jump to: navigation search This article is about the weather phenomenon. For other uses, see Tornado (disambiguation) A tornado in central Oklahoma . The tornado itself is the thin tube reaching from the cloud to the ground. The lower part of this tornado is surrounded by a translucent dust cloud, kicked up by the tornado's strong winds at the surface A tornado is a violently rotating column of air which is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud . Tornadoes come in many sizes but are typically in the form of a visible condensation funnel , whose narrow end touches the earth and is often encircled by a cloud of debris mph km/h feet ... m ) across, and travel a few miles (several kilometers Although tornadoes have been observed on every continent except Antarctica , most occur in the United States They also commonly occur in southern Canada , south-central and eastern Asia , east-central South America Southern Africa , northwestern and southeast Europe Italy , western and southeastern Australia , and New Zealand Part of the Nature series on
    Weather

    Seasons
    Temperate Spring ... Thunderstorm Tornado
    Tropical cyclone (Hurricane)

    Extratropical cyclone

    Winter storm
    Blizzard ... e
    Contents

    A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

    Page 3     41-60 of 72    Back | 1  | 2  | 3  | 4  | Next 20

    free hit counter