Sioux County UV ForecastUnited StatesNDSioux CountyVery high8.1Fort YatesVery high UV, 8.1Very high8.2Cannon BallVery high UV, 8.2Very high8.1SelfridgeVery high UV, 8.1Cannon BallCedar River National GrasslandFort YatesFort Yates Recreation AreaFroelich Dam State Game Management AreaLake OahePorcupineSelfridgeSlaughterhouse BaySolenStanding Rock Airport