The probability forecasting method of quantifying, timing and locating of hail storms in Weihai city is developed with analog deviation and sounding data from January 1986 to December 1997 in Eurasia. According to numerical information composed four circulation patterns of Weihai hail storms, the recognizing circulation patterns of numerical forecast production is finished with analog deviation. A multiple probability forecasting of quantifty, timing and locating of hail storms is realized with HLAFS numerical forecasting production and multiple-stage analog method in Weihai city.