Verification and Reproduction of the New Understandingfor Mechanism of Hail Cloud

Recent numerical simulations show that there are cave channels (CC) in hail clouds, which depend on the interaction between the stream and hydrometeor field; one end of the CC connects with embryoformation area, and the other with large stone formation area; while moving round the zero line of horizontal wind, particles concentrates to the CC, result in the accumulation of particles can be found in a whole. Target area should include the CC, which locates at the flank of the main updraft and closely below the zero line of horizontal wind and so on. In this paper, the above were verified by Doppler radar observations and be reproduced on the basis of some reliable researchos.