Analysis of Meteorological Satellite Data of a Lightning Processes in 2009 Summer in Sichuan

Based on the TBB value of FY2－C and FY2－D meteorological satellite and the data of the lightning location system，a lightning processes during June 19～20，2009 was selected to analyze the correlation between the spatial－temporal distribution of severe lightning and the evolutional characteristics of MCS．The results show that:(1) The numbers of lightning strike shows positive correlation to the intensity of MCS．(2) The lightning strikes mainly occur in the cloud area of less than 200K and the region of largest gradient of TBB．Not only concentrated in cloud area which less than 200K，but also hardly appear to cloud area larger than 240K; (3) In the development period of MCS，the intensive areas of lightning strikes is both at the core and right area of the highest gradient TBB region which before the clouds．Largest frequency of lightning strike appear in the time before the mature stage of MCS ．In the mature stage of MCS，frequency of lightning strike decline rapidly．After the mature stage of MCS，the lightning strike is located at the core of cloud area but disappear soon．(4) Single station heavy rainfall period has a good relationship with TBB low area and the peak value of the hourly lightning frequency is prior to the hourly precipitation peak，it can provide reference for the short time rainstorm warning．