The orographically-enhanced local severe wind is reviewed, focusing on the mechanism of the downslope wind. Theory of shallow water flow aver a ridge and internal gravity wavein a stratified atmosphere are presented to comprehend the local severe wind. Deformation by three-dimensional effect is also discussed . Numerical simulation of the “ Yamajikaze”, a downslope wind in Shikoku, is shown to suggest the predictability of the downslope wind.
