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• Tornado abstract "A tornado is a violently rotating column of air that is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. They are often referred to as twisters or cyclones, although the word cyclone is used in meteorology, in a wider sense, to name any closed low pressure circulation. Tornadoes come in many shapes and sizes, but they 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 and dust. Most tornadoes have wind speeds less than 110 miles per hour (180 km/h), are about 250 feet (80 m) across, and travel a few miles (several kilometers) before dissipating. The most extreme tornadoes can attain wind speeds of more than 300 miles per hour (480 km/h), stretch more than two miles (3 km) across, and stay on the ground for dozens of miles (more than 100 km).Various types of tornadoes include the landspout, multiple vortex tornado, and waterspout. Waterspouts are characterized by a spiraling funnel-shaped wind current, connecting to a large cumulus or cumulonimbus cloud. They are generally classified as non-supercellular tornadoes that develop over bodies of water, but there is disagreement over whether to classify them as true tornadoes. These spiraling columns of air frequently develop in tropical areas close to the equator, and are less common at high latitudes. Other tornado-like phenomena that exist in nature include the gustnado, dust devil, fire whirls, and steam devil; downbursts are frequently confused with tornadoes, though their action is dissimilar.Tornadoes have been observed on every continent except Antarctica. However, the vast majority of tornadoes occur in the Tornado Alley region of the United States, although they can occur nearly anywhere in North America. They also occasionally occur in south-central and eastern Asia, northern and east-central South America, Southern Africa, northwestern and southeast Europe, western and southeastern Australia, and New Zealand. Tornadoes can be detected before or as they occur through the use of Pulse-Doppler radar by recognizing patterns in velocity and reflectivity data, such as hook echoes or debris balls, as well as through the efforts of storm spotters.There are several scales for rating the strength of tornadoes. The Fujita scale rates tornadoes by damage caused and has been replaced in some countries by the updated Enhanced Fujita Scale. An F0 or EF0 tornado, the weakest category, damages trees, but not substantial structures. An F5 or EF5 tornado, the strongest category, rips buildings off their foundations and can deform large skyscrapers. The similar TORRO scale ranges from a T0 for extremely weak tornadoes to T11 for the most powerful known tornadoes. Doppler radar data, photogrammetry, and ground swirl patterns (cycloidal marks) may also be analyzed to determine intensity and assign a rating.".
• Tornado thumbnail Dszpics1.jpg?width=300.
• Tornado wikiPageExternalLink welcome.html.
• Tornado wikiPageExternalLink PT.3.2514.
• Tornado wikiPageExternalLink www.ejssm.org.
• Tornado wikiPageExternalLink ESWD.
• Tornado wikiPageExternalLink billions.
• Tornado wikiPageExternalLink stormevents.
• Tornado wikiPageExternalLink tornadoguide.html.
• Tornado wikiPageExternalLink www.tornadohistoryproject.com.
• Tornado wikiPageID "37530".
• Tornado wikiPageLength "94718".
• Tornado wikiPageOutDegree "279".
• Tornado wikiPageRevisionID "679832191".
• Tornado wikiPageWikiLink 1936_Tupelo–Gainesville_tornado_outbreak.
• Tornado wikiPageWikiLink 1999_Bridge_Creek_–_Moore_tornado.
• Tornado wikiPageWikiLink 1999_Bridge_Creek–Moore_tornado.
• Tornado wikiPageWikiLink 1999_Oklahoma_tornado_outbreak.
• Tornado wikiPageWikiLink 2013_El_Reno_tornado.
• Tornado wikiPageWikiLink Acoustics.
• Tornado wikiPageWikiLink Adiabatic_cooling.
• Tornado wikiPageWikiLink Adiabatic_process.
• Tornado wikiPageWikiLink Adriatic_Sea.
• Tornado wikiPageWikiLink Air.
• Tornado wikiPageWikiLink Amateur_radio_operator.
• Tornado wikiPageWikiLink Anadarko,_Oklahoma.
• Tornado wikiPageWikiLink Andover,_Kansas.
• Tornado wikiPageWikiLink Anemometer.
• Tornado wikiPageWikiLink Angular_momentum.
• Tornado wikiPageWikiLink Anticyclonic_tornado.
• Tornado wikiPageWikiLink April_25–28,_2011_tornado_outbreak.
• Tornado wikiPageWikiLink April_26,_1991_tornado_outbreak.
• Tornado wikiPageWikiLink Arctic.
• Tornado wikiPageWikiLink Arcus_cloud.
• Tornado wikiPageWikiLink Arid.
• Tornado wikiPageWikiLink Atmosphere_of_Earth.
• Tornado wikiPageWikiLink Atmospheric_pressure.
• Tornado wikiPageWikiLink Audio_frequency.
• Tornado wikiPageWikiLink Backlighting_(lighting_design).
• Tornado wikiPageWikiLink Balanced_flow.
• Tornado wikiPageWikiLink Bangladesh.
• Tornado wikiPageWikiLink Bar_(unit).
• Tornado wikiPageWikiLink Baroclinic.
• Tornado wikiPageWikiLink Baroclinity.
• Tornado wikiPageWikiLink Bernoullis_principle.
• Tornado wikiPageWikiLink British_Columbia.
• Tornado wikiPageWikiLink Canada.
• Tornado wikiPageWikiLink Canadian_Prairies.
• Tornado wikiPageWikiLink Canwarn.
• Tornado wikiPageWikiLink Category:Severe_weather_and_convection.
• Tornado wikiPageWikiLink Category:Storm.
• Tornado wikiPageWikiLink Category:Tornado.
• Tornado wikiPageWikiLink Category:Types_of_cyclone.
• Tornado wikiPageWikiLink Category:Weather_hazards.
• Tornado wikiPageWikiLink Category:Wind.
• Tornado wikiPageWikiLink Central_United_States.
• Tornado wikiPageWikiLink Civil_defense.
• Tornado wikiPageWikiLink Civil_defense_siren.
• Tornado wikiPageWikiLink Climate.
• Tornado wikiPageWikiLink Cloud.
• Tornado wikiPageWikiLink Cloud_base.
• Tornado wikiPageWikiLink Computer_simulation.
• Tornado wikiPageWikiLink Conservation_of_angular_momentum.
• Tornado wikiPageWikiLink Convective_outlooks.
• Tornado wikiPageWikiLink Coriolis_effect.
• Tornado wikiPageWikiLink Cultural_significance_of_tornadoes.
• Tornado wikiPageWikiLink Cumuliform_cloud.
• Tornado wikiPageWikiLink Cumulonimbus_cloud.
• Tornado wikiPageWikiLink Cumulus_cloud.
• Tornado wikiPageWikiLink Cumulus_congestus.
• Tornado wikiPageWikiLink Cumulus_congestus_cloud.
• Tornado wikiPageWikiLink Cyclogenesis.
• Tornado wikiPageWikiLink Cycloid.
• Tornado wikiPageWikiLink Cyclone.
• Tornado wikiPageWikiLink Cyclostrophic_balance.
• Tornado wikiPageWikiLink Daulatpur–Saturia_tornado.
• Tornado wikiPageWikiLink Daultipur-Salturia_Tornado.
• Tornado wikiPageWikiLink Debris.
• Tornado wikiPageWikiLink Debris_ball.
• Tornado wikiPageWikiLink Derecho.
• Tornado wikiPageWikiLink Direction_(geometry).
• Tornado wikiPageWikiLink Direction_(geometry,_geography).
• Tornado wikiPageWikiLink Doppler_On_Wheels.
• Tornado wikiPageWikiLink Doppler_on_Wheels.
• Tornado wikiPageWikiLink Downburst.
• Tornado wikiPageWikiLink Downdraft.
• Tornado wikiPageWikiLink Dry_line.
• Tornado wikiPageWikiLink Dust.
• Tornado wikiPageWikiLink Dust_devil.
• Tornado wikiPageWikiLink E-field.
• Tornado wikiPageWikiLink ENSO.
• Tornado wikiPageWikiLink Eddy_(fluid_dynamics).
• Tornado wikiPageWikiLink El_Niño.
• Tornado wikiPageWikiLink El_Niño_Southern_Oscillation.
• Tornado wikiPageWikiLink Electric_field.
• Tornado wikiPageWikiLink Electromagnetic_spectrum.
• Tornado wikiPageWikiLink Electromagnetics.
• Tornado wikiPageWikiLink Electromagnetism.
• Tornado wikiPageWikiLink Elie,_Manitoba.
• Tornado wikiPageWikiLink Emergency_Alert_System.

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