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Sigma KEE - Tornado

龙卷风

Tornado 是一团从积雨云底部延伸到地面，快速旋转的空气 Air。

Relationships
Parents	气旋风暴	CyclonicStorm is the class of LowPressureWeatherSystems that involve a low pressure area surrounded by winds rotating rapidly inwards.
	风暴	Storms occurs in an area where its Atmosphere is dominated by a LowPressureWeatherSystem with Air moving in MotionUpward.Surface Wind of over 30 KnotUnitOfSpeed and or Precipitation are Likely associated with Storms.