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Sigma KEE - CyclonicStorm

氣旋風暴

CyclonicStorm is the class of LowPressureWeatherSystems that involve a low pressure area surrounded by winds rotating rapidly inwards.

Relationships
Parents	低壓天氣系統	LowPressureWeatherSystem is the class of WeatherSystems characterized by barometricPressures of 29.5 Inchmercury (998.98mbar) or less. Low pressure systems typically introduce unsettled weather, frequently including storms.
	Storm	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.
Children	龍捲風	A Tornado is a rapidly rotating column of Air which extends from the Cloud base of a cumulonimbus to the ground.
	TropicalCyclonicSystem	TropicalCyclonicSystem is the class of CyclonicStorms that originates in the Tropics and typically have rotational winds of strong force (> 25 mph) or higher.The whole system typically moving forward at 10-15 mph, but it can also stay quasistationary, or travel as fast as 40 mph. https://www.metoffice.gov.uk/research/weather/tropical-cyclones/facts