A cold front will push across eastern Colorado late tonight, spreading a cooler airmass back across the state by Thursday. Clouds will increase across the region in the wake of the front, with mostly cloudy skies and a chance for mountain snow showers expected. The best chances for snow were expected across Lake and Chaffee counties along and west of the Continental Divide. Temperatures will be noticeably cooler across the region behind the front on Thursday, with highs topping out in the 50s over the eastern plains and generally in the 40s over the high country.   (Please visit http://weather.gov/pub for more information.)