A Local Short-Term Strong Precipitation and Heavy Rain Weather Process Analysis

Using conventional meteorological observation data,satellite cloud images and radar data and numerical model forecast data,a local short-term strong precipitation and heavy rain weather process occurred during May 28,2012 in Longnan of Gansu Province was analyzed.The results showed that: the rainstorm process is cold tank development with south pressure background in Menggu vortex,and the southwest vortex peripheral joint action of warm moist air flows,including the formation of good moisture condition and deep vertical upward movement produced by the suction function and local instability conditions for local rainstorm happened provide sufficient condition.At the same time,the merge and split of satellite cloud image has a good guidance to forecast short-term strong precipitation,and their numerical forecast the precipitation process forecast on smaller,but has a good guidance significance on general grasping precipitation drop zone and start-stop time on.