Portland and surrounding areas are preparing for a series of winter storms, with colder air arriving and snow levels dropping to as low as 500 feet. Residents can expect snow in Portland starting Monday night, with potential accumulations of 1 to 2 feet in the Cascade mountains and significant snowfall impacting travel conditions. Winter weather advisories are in effect across the Willamette Valley, as alerts highlight the risks of ice for commuters and difficult travel over the next few days. As temperatures remain chilly, the forecast suggests intermittent snow through Thursday, with residents in Eugene and the Coast Range also warned about possible icy conditions. This tumultuous weather pattern could bring a mix of snow and rain, creating a challenging week ahead for many in the region.