risk of (some inclement weather)
A significant chance of some kind of unpleasant weather, such as rain, snow, lightning, etc., occurring. I just heard that there's a risk of rain tomorrow. I hope our football game doesn't get canceled. You should never set off on a hike when there's a risk of lightning.
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.