Analysis of the Strongest Thunderstorm Gale of Jilin Province in Midsummer

Using high,low altitude observation data,Doppler radar and other relevant information,the formation mechanism of the strongest thunderstorm gale on July 13th,2006 in Jilin Province was analyzed from aspects of weather background,thermal conditions,distribution of water vapor,energy field distribution characteristics and instability degree parameters. The results showed that this thunderstorm gale is caused by a squall line,the convective storm developed violently from the complex interplay of the low altitude temperature and humidity increased, the middle altitude dry air invaded,downdraft outflows,caused the ground appear strong winds. Doppler radar reflectivity and radial velocity map can effectively monitor the thunderstorm,reflectivity echo is zonal or linear shape,there is a strong wind area and middle radial velocity of convergence in the radial velocity map and the obvious vertical wind shear. All above indicators are a good indication of wind forecasting.