Snow fell hard in parts of Colorado on Monday, including in Kiowa, where the National Weather Service reported 9 inches of new snow just before 9 p.m., and a short time later the Palmer Divide area was under a “winter storm warning.”

Other snow total reports in Colorado on Monday included: Silverton, 8.4 inches; Black Forest, 7 inches; and Monument and Peyton, 6 inches.

In Denver, just before 9 p.m., a light snow was falling in misty and foggy skies, according to the National Weather Service. The humidity in the city was at 100 percent and the temperature had dropped to 32 degrees. The weather service also upgraded Denver to a winter weather advisory.

The weather service said heavy, wet snow is expected overnight with accumulation of 2 to 6 inches, with the heavier amounts in the southern and eastern sections of the Denver metro. Denver’s winter weather advisory is posted through 9 a.m.

The wet, heavy snow is expected to break tree branches, possibly leading to scattered power outages.

Sections of roads in the Denver area became snow-covered and slushy on Monday night. Planes taking off from Denver International Airport late Monday were delayed for deicing operations, airport officials said.

The Colorado Department of Transportation said that “winter driving conditions” returned to Interstate 25 and Monument Hill and that plow crews “are out in force.”

At 10:20 p.m., CDOT reported that multiple crashes shut down eastbound lanes of the highway in Vail. Multiple sections of I-70 in the mountains were closed and reopened earlier on Monday by weather-related collisions, including an eastbound stretch east of the Eisenhower Tunnel.

In Denver on Tuesday, patchy fog is expected before 7 a.m. and snow should change to rain between 10 and 11 a.m., the weather service said. Thunder is possible and the high temperature will be about 45 degrees.