As we enter Thanksgiving week, Colorado is bracing for a significant weather event fueled by a strong atmospheric river flowing in from the west. A potent storm system is set to sweep through the region Tuesday into Wednesday, delivering widespread heavy snowfall to the Mountains with significant disruption to travel expected. Meanwhile, the Boulder-Denver Metro area faces a more uncertain forecast with varying snowfall predictions due to warm initial temperatures and questionable upslope. Despite the midweek forecast challenges, we can all at least look forward to a definitively quiet but chilly Thanksgiving Day. Read on for a complete outlook of the weather week ahead.