Abstract The Chung Li radar (24.91°N; 121.24°E) has been operating since 1986. A five-beam observational configuration has been used on a regular basis to study the various dynamics processes in the atmosphere-lower stratosphere height region. Due to its geographical location, the annual Typhoon and Mei-Yu seasons provide good opportunities to study the various interesting dynamic processes such as instabilities, generation of gravity waves, wave-mean field interaction, etc. Three-dimensional air motions due to these fronts will be presented. Special cases of gravity wave generation, propagation and their effects on the turbulent layers will be discussed.