A winter weather advisory has been issued for Colorado’s central and northern mountains from midnight on Monday through 6 p.m. on Tuesday. Little to no snow accumulation is expected in mountain valleys. The weather service is warning of slippery and slushy road conditions over high mountain passes, with hazardous conditions expected to impact commutes on Tuesday morning and into the evening. That means the “high-ish sun angle could lower the accumulation and cause quick melting or consolidation,” Gratz said. Gratz predicts the weather will return to warmer conditions following this storm, with no significant cool spells or snowfall likely through the rest of September.