violent storm(n = noun.phenomenon) storm - a violent weather condition with winds 64-72 knots (11 on the Beaufort scale) and precipitation and thunder and lightning;
is a kind of atmospheric phenomenon
is a part of beaufort scale, wind scale
has parts: storm center, storm centre
has particulars: firestorm, noreaster, northeaster, hailstorm, ice storm, silver storm, rainstorm, blizzard, snowstorm, electric storm, electrical storm, thunderstorm, windstorm

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