Thu Feb 20 05:14:56 AM EST 2025 Northern Sioux County- Including the city of Harrison 314 AM MST Thu Feb 20 2025 ...EXTREME COLD WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... .TODAY...Partly sunny. Not as cold with highs in the lower 20s. South winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 32 below this morning. .TONIGHT...Partly cloudy. Not as cold with lows around 6 above. Temperature rising to around 12 after midnight. Southwest winds 5 to 10 mph, becoming west after midnight. Wind chill values as low as 7 below. .FRIDAY...Mostly sunny. Not as cool with highs in the upper 30s. Northwest winds 5 to 10 mph with gusts up to 20 mph. Wind chill values as low as 1 below in the morning. .FRIDAY NIGHT...Mostly clear. Not as cold with lows around 17. West winds 5 to 10 mph. .SATURDAY...Mostly sunny. Highs in the mid 40s. West winds 10 to 15 mph. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows in the upper 20s. Highs in the mid 50s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 30s. .MONDAY AND MONDAY NIGHT...Mostly clear and windy. Highs in the lower 60s. Lows in the upper 20s. .TUESDAY AND TUESDAY NIGHT...Partly cloudy and breezy. Highs around 60. Lows in the upper 20s. .WEDNESDAY...Mostly sunny and windy, cooler with highs in the mid 40s.