s－r螺旋度在皖西南强风暴预报中的应用

应用常规探空资料，对皖西南地区强风暴天气的ｓ－ｒ螺旋度进行了计算分析。结果表明。ｓ－ｒ螺旋度作为一个新的诊断量，对皖西南非孤立龙卷、大范围冰雹及距测站５０ｋｍ内的局地龙卷有较好的预报能力。

The Application of Helicity Forecasting to Severe Convective Storm Weather in Southwest Anhui Province

The helicity of severe storm processes had been counted and analysed with routine weather reports. The results show that helicity as a new diagnosis measure is helpful for forecasting of severe storm weather such as wide range of hailstone,no-isolated tornado and local tornado within 50km.