Abstract: On the basis of FY satellite data during 2007-2017 and conventional radiosonde and surface observations,in the light of the 23 regional hail weather processes in Guangxi,three kinds of conceptual models for regional hail against satellite imagery including the low trough type of north China,the low trough type in eastern plateau and the south branch trough type were established based on the main influence weather system and characteristics of cloud pattern inversed with satellite data.The results show that satellite imagery models play a key role in indicating the position and type of upper trough cloud,and the hail cloud cluster mostly originates from the bottom of upper trough.In addition,the subtropical jet cloud system along the South China coast also plays an important role in the occurrence and development of hail clouds which usually occur in the clear sky area on the north side of the subtropical jets.The regional hail cloud cluster in Guangxi shows up as a long oval shape with a smooth "V" shape boundary in the upper wind direction and a long anvil sticking out along the downwind.

Key words: Regional hail, Conceptual model on satellite imagery, Cloud form features, Hail cloud