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The Application of FY-2 Satellite Products to Jinan Severe Heavy Rain Nowcasting on 18 July 2007

Yin Chengmei Zhuo Hong Hu Peng Ran Guiping Liu Aimei Yang Furong Li Yanping(Jinan Meteorological Observatory,Shandong Province 250002)  
With the conventional and intensive observation data and FY-2 satellite products,the mesoscale convective systems(MCSs) that caused the "7.18" severe heavy rain over Jinan are analyzed.The meso-scale convergence center and line played important roles.Furthermore,the severe heavy rain occurred near the center of meso-scale low pressure and accompanied with them.The new cloud clusters which generated behind the right rear of the weakened clouds developed from meso-γ to meso-β scale.Under enough vapor conditions,they expanded into compacted α-scale clouds with a clear edge that directly caused the severe heavy rain.The maximum precipitation was strongly related to the lowest TBB measured by FY-2 satellite,therefore,FY-2 satellite products is very important in nowcasting.
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