▁form ▁on ▁the ▁triple - point ▁( the ▁point ▁where ▁the ▁cold ▁front , ▁warm ▁front , ▁and ▁occ l ud ed ▁front ▁meet ). ▁During ▁triple - point ▁cy c log en esis , ▁the ▁occ l ud ed ▁parent ▁low ▁will ▁fill ▁as ▁the ▁secondary ▁low ▁deep ens ▁into ▁the ▁main ▁we ath erm aker . ▁ ▁Trop ical ▁cycl ones ▁▁ ▁Trop ical ▁cycl ones ▁exist ▁within ▁a ▁mes osc ale ▁alpha ▁domain . ▁As ▁opposed ▁to ▁mid - lat itude ▁cy c log en esis , ▁tropical ▁cy c log en esis ▁is ▁driven ▁by ▁strong ▁con ve ction ▁organ ised ▁into ▁a ▁central ▁core ▁with ▁no ▁bar oc lin ic ▁zones , ▁or ▁front s , ▁extending ▁through ▁their ▁center . ▁Although ▁the ▁formation ▁of ▁tropical ▁cycl ones ▁is ▁the ▁topic ▁of ▁extensive ▁on going ▁research ▁and ▁is ▁still ▁not ▁fully ▁understood , ▁there ▁are ▁six ▁main ▁requirements ▁for ▁tropical ▁cy c log en esis : ▁ ▁sea ▁surface ▁temper atures ▁that ▁are ▁warm ▁enough , ▁atmos pher ic ▁inst ability , ▁high ▁hum id ity ▁in ▁lower ▁to ▁middle ▁levels ▁of ▁the ▁tro pos phere , ▁enough ▁Cor i olis ▁force ▁to ▁develop ▁a ▁low ▁pressure ▁center , ▁a ▁pre - ex isting ▁low ▁level ▁focus ▁or ▁disturb ance , ▁and ▁low ▁vertical ▁wind ▁she ar . ▁These ▁warm ▁core ▁cycl ones ▁tend ▁to ▁form ▁over ▁the ▁o ce ans ▁between ▁ 1 0 ▁and ▁ 3 0 ▁degrees ▁of ▁the ▁equ ator . ▁ ▁Mes ocy