A very strong jet stream in the Pacific Ocean will begin moving into the central Colorado Rockies by early today. A strong winter storm will begin to affect the Continental Divide as it tracks to the north of the jet stream. This storm will bring a prolonged period of heavy, wind-driven snow to the San Juan Mountains and Sawatch Range in central Colorado through Tuesday. This storm will likely result in 2 to 4 feet of snow accumulation for the Eastern San Juans, with higher drifts, and a foot or more in the Sawatch. Snowfall will taper off by Wednesday, but another foot or more of snow is possible for the higher elevations by Friday, Dec 11th. Expect hazardous travel over the passes for much of next week, with significant blowing and drifting snow, and blizzard conditions for the higher elevations of the San Juan and La Garita Mountains. It will also be very cold, with wind chills well below zero. Anticipate road closures and an increasing avalanche threat in the backcountry through next weekend. Stay tuned for the latest forecasts and statements regarding the expected hazardous weather.