Contrast Analysis on Two Successive Torrential Rain Processes over Southern Shandong Area

Based on conventional observation data and the Doppler radar data,the two times of heavy rain in southern Shandong area on July 8and July 10,2012 were comparative analyzed. The results are as follows:Low level jet and shear line is an important system for rainstorm,the center of heavy rainfall are around the mesoscale convergence lines in the surface wind field;Strong development of low level jet implies a strong precipitation,by judging the low-level jet and the bearing layer wind can roughly estimate the strong echo path and velocity of movement,and provides the basis for the duration prediction of short-time rainstorm and falling area. Heavy rain is generated by strong echo higher precipitation efficiency continues to produce slowly after merger;Radar wind profiler products contribute to the understanding of rainstorm weather environment field,provide the basis for the variation of the rain intensity prediction of short-time rainstorm.