Tropical cyclones (TCs) are among the most destructive natural weather phenomena and can cause extensive damage to coastal countries and regions. Close monitoring and accurate forecasts of the tracks and intensity of TCs are needed to reduce human and financial losses.Tropical cyclones are powered by latent heating, mainly from strong updrafts in the eyewall (Charney & Eliassen, 1964;Emanuel, 1986;Kuo, 1965), and latent heat release in the storm is responsible for the dynamical structure and intensity change of the storm (Braun, 2002;Cecil & Zipser, 1999). Latent heat release is also involved in generating stratospheric gravity waves (GWs) (