Doppler weather radar echo characteristics of a hail disaster in North Slope of Tianshan Mountain,Xinjiang province

Based on Doppler weather radar data and the conventional weather data,radar echo evolution of a hail happened in the afternoon on July 3,2007 in boundary zones(151 corps place) between the south mountain of Shihezi reclamation regions and the plain was analyzed.The results indicate that this strong convection storm has the typical characteristics of super cell storm.There is a hook echo on the right side of advancing direction of storm and a V gap on the northwest side of that.The vertical section of reflectivity factor exists weak echo region,echo overhang and echo wall.The echo wall is located in the left side of weak echo region.The maximum echo intensity reaches 65 dBz,and the vertically integrated liquid water contents are more than 70 kg/m2.Mesocyclone could be found on the corresponding radial velocity maps.The moving direction of this super cell storm is on the 30°right side of prevailing wind direction,and it belongs to rightward moving super cell storm.