Sioux County UV ForecastUnited StatesNDSioux CountyVery high9.2Fort YatesVery high UV, 9.2Very high8.7Cannon BallVery high UV, 8.7Very high9.4SelfridgeVery high UV, 9.4Cannon BallCedar River National GrasslandFort YatesFort Yates Recreation AreaFroelich Dam State Game Management AreaLake OahePorcupineSelfridgeSlaughterhouse BaySolenStanding Rock Airport