An overnight storm dropped 1 to 3 inches of snow on Denver and its surrounding areas, leaving morning commuters facing slick and icy roads.

Chad Gimmestad with the National Weather Service said the storm brought unexpectedly high snow levels to the metro area, and it’s not quite done yet.

“This band is weakening over Denver this morning and dropping south, so the northern part of the city is about done. The southern part of the city might have a little bit more during rush hour, maybe another inch, but that’s about it,” Gimmestad said.

Snow will peter out starting Tuesday afternoon. Forecasts predict the snow will return on Thursday.

Denver was the only major urban area to receive significant snow, with Grand Junction and Colorado Springs seeing a very light dusting in some patches. The mountains received several inches of snow, a good sign for ski resorts beginning to open up.

Plow trucks are already working to clear major roadways in Denver, but side roads could still be slippery. Officials are telling drivers to clean snow off cars before driving and to leave plenty of space between cars while on the road.

Traction laws are in effect for I-70. Passenger cars are required to have snow tires, chains, or four-wheel drive.

So far, Denver Public Schools hasn’t announced any school closures or delays. Regis University has canceled classes that start before 10 a.m. due to issues clearing ice from its parking lots.

Several bus and rail lines in the city are experiencing delays. The affected routes include:

• A Line trains
• Route 9 buses
• Route CV buses
• Route EV buses