1 general:: Phrase(s): risk of rain [and] risk of showers; risk of thunder- (storms) a chance of precipitation. (Used only in weather forecasting. There is no "risk" of hazard or injury involved.) • And for tomorrow, there is a slight risk of showers in the morning. • There is a 50 percent risk of rain tonight.
McGrawhill's American Idioms And Phrasal Verbs