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What Are Severe Thunderstorms, and What Causes Them? ... Learn about your area's severe thunderstorm risk. Severe thunderstorms can occur year-round and at any hour. Contact your local emergency management office, local National Weather Service office, or American Red Cross chapter for more information.
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www.disastercenter.com/guide/thunder.html
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Severe thunderstorm watch - Wikipedia, the free encyclopedia
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A severe thunderstorm watch (SAME code: SVA; sometimes referred to as "blue box" or "yellow box" by meteorologists and storm chasers) is issued when weather conditions are favorable for the developm...
en.wikipedia.org/wiki/Severe_thunderstorm_watch
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One kind of severe thunderstorms is called a supercell. A supercell has a rotating, long-lived, intense updraft that gives it incredible power. ... The Forces The Stages Severe Thunderstorms ; Hazards Watches & Warnings The Quiz Activities...
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weathereye.kgan.com/expert/tstorms/severe.html
weathereye.kgan.com/expert/tstorms/severe.html
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Explains what lightning and thunder are. ... Qustions and Answers about Thunderstorms and Severe Weather ... In some cases, positive charges come to the ground from severe thunderstorms or from the anvil at the very top of a thunderstorm cloud. The whole process takes less than a millionth of a second.
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www.wxdude.com/page5.html
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1. THE IMPACT OF SEVERE THUNDERSTORMS ... This information on Severe Thunderstorms in Australia is provided by the Bureau of Meteorology and Emergency Management Australia. ... 1. THE IMPACT OF SEVERE THUNDERSTORMS; 2. SEVERE THUNDERSTORMS: DEFINITION, CAUSES AND OCCURRENCE; 3. SOME AUSTRALIAN SEVERE THUNDERSTORMS; 4.
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www.bom.gov.au/info/thunder/
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Severe Thunderstorms in New South Wales ... The information contained within this site has been prepared by the Bureau of Meteorology's Severe Weather Section in NSW and relates specifically to the occurrence of severe thunderstorms within that State and the ACT.
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www.bom.gov.au/weather/nsw/sevwx/
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The National Weather Service uses wind speed and hail size to define "official" severe thunderstorms. As you can see in the graphic above, a thunderstorm is declared severe by the NWS if wind gusts reach 57.5 mph or stronger or if hail size is three quarters of an inch or bigger.
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www.usatoday.com/weather/wsevstrm.htm
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Where Are Severe Thunderstorms Likely to Occur? ... These are known as severe thunderstorms. Severe thunderstorms produce hail the size of a dime or larger and/or winds of 58 miles per hour or greater. ... Convective Outlooks - Issued to outline areas where severe thunderstorms may develop and qualifies the degree of risk (i.e.
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www.floridadisaster.org/bpr/EMTOOLS/Severe/thunderstorm...
www.floridadisaster.org/bpr/EMTOOLS/Severe/thunderstorms.htm
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