A strong winter storm is set to affect the U.S. Southwest this week. Meteorologists caution that up to 20 inches of snow may impact the Wasatch and Uinta Mountains, leading to hazardous travel conditions from early Thursday through Friday. The National Weather Service has issued a winter storm watch, which may escalate to a warning as the system gains strength. Mountain routes such as Mirror Lake Highway, Logan Summit, Alta, and Brighton are likely to become perilous as heavy snowfall and a cold front sweep in. A brief pause in snowfall is anticipated Thursday afternoon, followed by another round of heavy snow overnight. Some regions in the Upper Cottonwoods could experience the most significant accumulations. In other areas, totals of 6 to 14 inches are predicted, with as much as 9 inches across larger sections of Utah under a winter weather advisory. Remain vigilant, monitor road conditions, and get ready for swiftly changing weather as this significant winter system approaches.