heavy water vapour

Arid regions are often far from sea and ocean, the patterns of supply of water vapour to heavy rain area are generally different from those in humid regions.

干旱地区一般远离海洋，大降水天气过程的水汽供应方式往往有其特色。

Southwest wind enhancement, water vapour flux increase, ascending motion enhancement and water vapour convergence in upper level arouse the heavy snow process in central and east Yunnan.

高层西偏南风加强、水汽通量增大、上升运动的加强以及水汽的辐合造成滇中及以东的强降雪；

The analysis of the source of the water vapour and the hydrologic balance of the heavy rainfall in the upper reaches of the Huaihe River is made.

分析了淮河上游大暴雨过程的水汽来源和暴雨区的水分平衡。