降水概率 meaning in English

probability of precipitation

When we hear weather forecast of a seventy percent chance of rain, we change our plans from a picnic to a pool game .
当我们听到预报有70的降水概率时，就改变去野餐的计划，而去打台球。
It ' s staying cloudy tonight , with a 40 % chance of rain or _ _ , and tomorrow it ' s going to start dry with bright spells
今日晚间多云,降水概率40 % ,有迹象显示明天开始转晴