A weather system out of the northwest will cause clouds to thicken throughout the state today.  Light snow will also develop in western and southern portions of the state this afternoon and evening.  This will cause visibility to be reduced at times and roads to become slick and icy, especially across I-25 (Colorado state line to Wheatland), I-80 (Nebraska state line to Lyman) and US-85 (Colorado state line to LaGrange).  Poor visibility and hazardous driving conditions will be expected across I-80 from Lyman to the Utah state line as well as WY-28 near South Pass.  There will be a chance for snow throughout the rest of the state tonight, but no major travel concerns are expected.  Temperatures will be not as cold today, but still remain well below average.  Expect daytime highs in the teens and 20's.  Light snow will taper off on Friday morning, with the exception of far western portions of the state.  We will then see partly to mostly cloudy skies with temperatures reaching the 30's and lower 40's.  A strong cold front will then cross through  the region Friday night into Saturday, which will cause snow to redevelop and cause travel concerns throughout the state.