The main reason is that the updraft over the ice rain area is weak, and the vapor in the air is not saturated.

这主要是因为冻雨区的上升气流弱，高空水汽不饱和。

youdao

The rice yield loss in the torrential rain area of Fujian in 2007 was predicted and tested by means of the evaluation model.

利用评估模型对2007年福建暴雨发生区域的水稻单产进行灾损预估及检验。

youdao

The calculation of the geopotential tendency gives good indications in the forecasting of heavy rain area and the movement of low systems.

日常业务中计算500毫巴层位势倾向，在判断未来低值系统的移动和暴雨落区中，有一定指示意义。

youdao

The area is really a desert, receiving only about thirty-five centimeters of rain a year.

VOA: special.2009.04.15

Many centuries of rain caused huge rivers to move violently through this area.

VOA: special.2009.01.07

Thunderstorms were expected to bring erratic winds but little rain to the area about 200 miles north of San Francisco.

NPR: Cause Of California Wildfire Appears Accidental

Friday's broad storm in Oklahoma hit during the evening rush hour and stuck around, causing havoc on Interstate 40, a major artery connecting suburbs east and west of the city, and dropping so much rain on the area that streets were flooded to a depth of 4 feet.

WSJ: Tornado-Hit Oklahoma Struck Again; Mother and Baby Dead

Hail and heavy rain pelted the metro area to the point that emergency workers had trouble responding to "widespread" reports of injuries.

NPR: 2 Dead When Tornado Hits Oklahoma City Area