(Video clip from the Science Center of Minnesota)  It's believed that tornadoes begin with a rising current of warm air called this, which eventually starts rotating
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Ask the Experts: Your weather questions answered - USATODAY.com  Q: When is the latest it's snowed in some northern U.S. cities? ... A: Cold air is denser than warm air, meaning that more air molecules are ... Comparing the temperature of a parcel of air rising through the atmosphere with the .... that condenses into cloud droplets with rising columns of air called thermals. ...... Featured video.
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Tornado, violently rotating column of air extending from within a ...  Also, at what wind speed of the cloud-to-ground vortex does a tornado begin? ... An updraft is a current of warm, moist air that rises upward through the thunderstorm. ... makes visible the generally weaker sea-going tornadoes, called waterspouts. ... it's the ability to do work (that's one of the plainest definitions in science).
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Minnesota Meteorologists On Strike (demanding better weather ...  May 2, 2011 ... It's hard to comprehend how the tornado count from last ... worked a 27-hour shift at the Birmingham shelter starting Wednesday afternoon.
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Game of Thrones 609: "Battle of the Bastards" Trailer Breakdown  Jun 13, 2016 ... ... upon us, it's time to dive into the trailer that debuted at the end of it. ... UPDATE: Emilia Clarke posts pics and video from Game of Thrones. ..... of that swing being Snow's resurrection and the start of Bran's discoveries). .... I had once thought we might see the White Walkers appear as the Battle is raging.
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Classical Mechanics - Ask the Physicist!  At such a large speed, air drag has an enormous effect on ball. ... There is an earlier question similar to yours except the object is rising instead of sinking. .... So, if you start it sliding and not rolling, it will begin spinning about its center of ... until eventually F=0 and the ball would go down with a constant speed called the...
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A Brief History of the Storm Prediction Center  The SPC, formerly known as the National Severe Storms Forecast Center, ... forecasting of severe local storms in the United States during the first part of the 1900s. ... Force Base in Oklahoma City on 20 March 1948 --- Air Force weather officers ... The success of the Air Force tornado program --- along with media pressure...
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Full text of "An advanced practical physical geography for public and ...  Diagram explaining the Determination of Latitude in Winter . ...... Bodies, like water, that have high specific heat, take longer to get hot, can hold more heat, ...... The Fohn wind of Switzerland is a south wind of similar origin to the Chinook, ... of snow, is called in the German Alpine Foreland the Schneefresser (snow-eater).
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Tornado - Wikipedia  A tornado is a violently rotating column of air that rotates while in contact with both the surface ... These spiraling columns of air frequently develop in tropical areas close to the .... While traveling over a body of water (as a waterspout), tornadoes can turn very ..... Those that occur near intense wildfires are called fire whirls.
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Whirlpool - Wikipedia  A whirlpool is a body of swirling water produced by the meeting of opposing currents. The vast ... The maelstrom of Saltstraumen is the earth's strongest maelstrom, close to the Arctic Circle .... Coriolis effect  Eddy (fluid dynamics)  Rip current...
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How Tropical Storms and Hurricanes Spawn Tornadoes - Live Science  Jun 6, 2013 ... Hurricanes that make landfall often spawn tornadoes, adding to ... First, most hurricanes carry with them individual supercells, which are rotating, well-organized thunderstorms. ... All tornadoes need thunderstorms to form, said Brian McNoldy, ... These alternating winds can create swirling air, called rolls.
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Weather Term Glossary and Education - thorntonweather.com  Oct 25, 2016 ... Refers to the warm downslope wind in the Rocky Mountains that may .... temperature is increased as the wind descends down the slope. It is created when air flows downhill from a high elevation, raising the temperature by adiabatic compression. ... The name of the twenty-four hour time scale which is used...
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Weather Glossary | Weather Underground  A portion of the solar limb displaying active prominences; typically associated with an ... This cloud often forms ahead of warm fronts leading a storm with light and .... A bright stream of gas emanating from the chromosphere that moves .... It was formerly known as Greenwich Mean Time, or sometimes simply Universal Time.
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Scientists capture the first ever footage of ball lightning | Daily Mail ...  Jan 20, 2014 ... These then recombine to form nanoparticles or filaments which, while still floating ... Therefore, they referred to the phenomenon as 'ball-lightning-like ...... snaps from break in St. Lucia Enjoying the tropical weather in her bikini.
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Tornado intensity - Wikipedia  Tornado intensity can be measured by in situ or remote sensing measurements, but since these ... Some believed they reach 400 mph (640 km/h); others thought they might ... The first observation which confirmed that F5 winds could occur happened on ... People in the path of a tornado should never attempt to determine its...
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Monthly tornado averages by state and region - U.S. Tornadoes  Mar 19, 2013 ... While it is true that the peak of most tornado years occurs in this period, ... it's mainly the milder months when tornadoes are found, and they are...
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c A little (rough) night music c - Natural Hazards Center  May 12, 2012 ... fourth highest number of EF-4 or EF-5 tornadoes recorded in any year since 1950 ..... Tornado town aptly named. Topeka .... a female passenger, Dorothy MacLennan. Similarly, in .... Internet disaster song videos use graphic film foot- age. ...... used to probe subduction dynamics in three regions: the deep.
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Weather 101: All About Wind and Rain - Live Science  Oct 13, 2005 ... What drives wind, rain, snow and everything else above. ... Not all raindrops are what you might think. ... Typically, the warm air gets pushed up over the cold air. ... A storm's energy, in the form of increased thunderstorm activity, alters the path of the polar jet stream, typically kicking it further north, where it...
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Most Asked Weather Questions - The Weather Dude  This is the number one most-asked question I get. ... However, as the warm air rises from the heated ground, the air pressure decreases, and the air cools. ... Then after a few minutes, you drive right out of the rain into clear skies again. ... A forecast for isolated thunderstorms means that most of the area will not see them,...
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Cold front - Wikipedia  A cold front is defined as the leading edge of a cooler mass of air, replacing at ground level a warmer mass of air, which lies within a fairly sharp surface trough of low pressure. It forms in the wake of an extratropical cyclone, at the leading edge of its cold ... When a cold front catches up with the preceding warm front, the portion of...
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Definition: Tornado (also called cyclone, twister) is a violently ...  Definition: The tornado (also called cyclone or twister) is a violently rotating ... is a tornado over water -- usually meaning non-supercell tornadoes over water. ... Gustnadoes: These very small scale, shallow vortices may develop near the...
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Severe Weather 101: Tornado FAQ - NSSL The National Severe ...  Tornadoes come from the energy released in a thunderstorm. ... based on the path of the storm producing the tornado, but even these cannot be perfectly precise about who ... The Storm Prediction Center issues tornado and severe thunderstorm watches. Your local National Weather Service offices issue tornado warnings.