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Analysis on A Severe Convective Process Occurred in 2008 Early Summer at Anhui Province

ZHOU Kun et al (Anhui Weather Forecast Service Center,Hefei,Anhui 230031)  
There are several thunderstorms at Jiangbei of Anhui Province on June 3th 2008.The routine data,cloud chart,radar echo and damage information show that there is weak cold air sweeping the Jiangbei from the Northeast at high level.There is a warm low pressure center in the Anhui surface.K index is larger than 30 at Jiangbei of Anhui Province.the altitude of 0 ℃ is about 3 km.There is small convective available potential energy,local humidity is big and there is large wind vertical shear at low level.When surface cold front moved southeast the severe convective weather occurred companying lightening,gale and hail. There are supercells characteristics in radar echo.These are big reflectivity, large reflectivity gradient at low level,hook,bounded weak echo region,overhang at high level,cyclone at low level,anticyclone at high level,hail index and mesoscale cyclone.
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