In order to apply the professional knowledge and practical experience of forecasting experts to daily operational weather forecasting and to solve the problem of the knowledge accumulation, an advisory weather forecasting expert system has been designed and its current frame developed by use of the new TURBO-PROLOG Language on the IBMPC/XT micro-computer. It has been run satisfactorily after importing the expert experiences about cold wave, hailstorm and sea breeze. Re-sults show that it has reached the subjective forecasting level of experts.