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What makes a thunderstorm “severe�


knocker
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Posted
  • Location: Camborne
  • Location: Camborne

     

    What exactly distinguishes a “severe†thunderstorm from any other thunderstorm?  The official definition of a “severe†storm may strike you as  arbitrary. According to the National Weather Service, a severe thunderstorm must include winds of 58 MPH or greater, hail one inch in diameter or larger, or a tornado. But why are these the criteria and how did they come about?

     

    http://www.washingtonpost.com/blogs/capital-weather-gang/wp/2014/07/09/what-makes-a-thunderstorm-severe/

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    Posted
  • Location: Medway - 125m ASL
  • Weather Preferences: Hot summers, snowy winters and thunderstorms!
  • Location: Medway - 125m ASL

    Thanks for that, i have always wondered.

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    Posted
  • Location: just south of Doncaster, Sth Yorks
  • Location: just south of Doncaster, Sth Yorks

    that is for the states not the UK although it is a good description of what the most severe in the UK might deliver. I cannot find the Met O definition but WMO weather code 97 is how it is described if by a human observer.

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    Posted
  • Location: Llanwnnen, Lampeter, Ceredigion, 126m asl (exotic holidays in Rugby/ Coventry)
  • Location: Llanwnnen, Lampeter, Ceredigion, 126m asl (exotic holidays in Rugby/ Coventry)

    Yeah what applies for the US is irrelevant for our more temperate climes.

    However once I did witness such a storm, in Coventry August 1975 - all three occured in that!

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