A storm system will move through the Rockies this weekend in two episodes. The first will unfold as a low pressure system tracks from Utah on Friday to northern Colorado and southern Wyoming Saturday and Saturday night. This first system will bring a round of moderate snow to the Continental Divide, where a Winter Storm Warning is in effect through Sunday morning. As this storm moves eastward, a cold front will push southward over the plains, and a brief period of snow could accompany the front Saturday night. The best chance for snow east of the mountains will be over Northern El Paso and Teller Counties, where strong north winds could result in some reduced visibilities due to blowing snow. Only light accumulations are anticipated at this time. A slightly better chance for some snow over the plains will come Sunday night into Monday, as a second low pressure system moves through northern New Mexico and southern Colorado. Winds will shift to the east, or upslope, a! nd this could bring a longer period of light snowfall to the Interstate 25 corridor.   (Please visit http://weather.gov/pub for more information.)