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Sigma KEE - Hurricane
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颶風
颶風(Hurricane)是在东北太平洋(NortheasternPacificOcean) 或北大西洋(NorthAtlanticOcean)形成、1分钟平均地面风速(Mean1MinuteWindSpeedFn) 达到或高于每小时74英里 (MilesPerHour)的热带气旋(TropicalCyclone)。按照萨菲尔辛普森飓风风力等级(SSHWSAttribute)可分为五个等级。
Relationships      
Parents 热带氣旋系统 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


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