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The evolutionary trends of storm cells in three severe weather events occurred in 2005 and 2006 in Shandong Province are analyzed by means of CINRAD/SA data from the Jinan radar station. The results indicate that there appeared synchronous increase in cellbased CVIL and maximumreflectivity heights in some severe storm cells before hailing on the ground, with the height being 6 km or higher and CVIL being over 18 kg/m2; and there appeared synchronous decrease before violent surface wind occurring with the height being 2 km or lower and CVIL being at least 10 kg/m2. The lead time of 7 to 20 minutes for hailwarning and that of 0 to 9 minutes for violent surface wind warning are obtained.