Using the CINRAD data in Sanmenxia,the paper analyzes radar product characteristics and confirms hail weather forecast index.

By dynamical and diagnosis method,analyzed the cause of torrential rain which lead floodwater in Ugan River valley in Tianshan Mountains from 22 to 24 in July 2000,and attempted to found accurate forecast index of the region of torrential rain in summer.

Detailed forecast indexes are given according to different seasons and drought types.

Characteristic analysis and prediction index Study of fog in urban area of Harbin City;

Through correlative study of release characteristics of CO 2 from the springs in Heqing,Eryuan,Xiaguan and Midu,Dali region and regional seismicity,individual earthquake prediction index is extracted,thus composing system and finding out synthetical prediction indexes of CO 2 in Dali region.

Empirical methods and prediction index of short-impending earthquake synthetic prediction in recent years in Yunnan-Sichuan area and vicinity are given in this paper, and analysis method during strong earthquake short-impending period and empirical comprehensive analysis of strong earthquake s 3 elements are studied from various aspects.

Some problems determining prediction indicator set for hailfall with stepwise decreasing FAR method,such as the determining procedure,the searching key,the identification and the number of the prediction indicator,were discussed.