...PROLONGED PERIOD OF HEAVY SNOW AND HAZARDOUS TRAVEL CONDITIONS FOR THE NORTHERN MOUNTAINS LATE FRIDAY THROUGH SATURDAY... .Light snow will decrease towards dawn with a lull in the snowfall expected Friday morning. Snow will increase in coverage and intensity later Friday afternoon and night with arrival of next shot of energy and deeper moisture. The heaviest snow will impact the Park Range, including Rabbit Ears Pass, and to a slightly lesser extent the northern Front Range mountains (Medicine Bow Range, Rocky Mountain NP). Additionally, strong winds will be present at times through Friday night, resulting in blowing snow, poor visibility and treacherous conditions for most mountains passes/roadways. Lighter snow will impact the I-70 mountain corridor beginning Friday, and will lead to deteriorated conditions coinciding with weekend ski traffic. ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY... * WHAT...Light snow this morning will become heavy snow in the afternoon and will last through tonight. For the Park Range, expect storm total snow accumulations of 16 to 26 inches. For the Medicine Bow Range and Rocky Mountain NP, expect storm total snow accumulations of 10 to 15 inches for the higher elevations. Winds gusting as high as 60 mph over the higher peaks. * WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the Medicine Bow Range. * WHEN...Until 5 PM MST Saturday. * IMPACTS...Travel could be very difficult to impossible from late Friday through Saturday. Gusty winds could bring down tree branches.