Thu Feb 20 05:14:56 AM EST 2025 Cheyenne County- Including the cities of Sidney and Brownson 314 AM MST Thu Feb 20 2025 ...EXTREME COLD WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... .TODAY...Mostly cloudy. Not as cold with highs around 17. South winds 15 to 20 mph with gusts up to 30 mph. Wind chill values as low as 27 below. .TONIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Cold with lows around 2 above. South winds 10 to 15 mph with gusts up to 25 mph, becoming southwest 5 to 10 mph after midnight. Wind chill values as low as 13 below. .FRIDAY...Sunny. Not as cool with highs in the mid 30s. West winds 5 to 10 mph. Wind chill values as low as 11 below in the morning. .FRIDAY NIGHT...Mostly clear. Not as cold with lows around 16. West winds 5 to 10 mph. .SATURDAY...Sunny. Not as cool with highs in the mid 40s. West winds 10 to 15 mph with gusts up to 25 mph. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 20s. Highs in the mid 50s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 30s. .MONDAY THROUGH TUESDAY...Mostly clear and windy. Highs in the lower 60s. Lows in the lower 30s. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy and windy. Lows in the lower 30s. Highs in the upper 40s.