A cold front will move through eastern Colorado the first half of today ...bringing increasing clouds and the possibility of precipitation across a large part of the region. Look for snow in the mountains and southern valleys...and along the Palmer Divide. Precipitation will be mainly rain along the I-25 corridor...although it could be late in the day before the moisture spreads to the far eastern counties. Temperatures will be cooler...especially east of the mountains...with readings in the upper 30s to mid 40s along the Arkansas River valley and the plains...and the 20s and 30s elsewhere.   (Please visit http://weather.gov/pub for more information.)