A storm producing areas of snow over interior British Columbia at the start of the week is expected to move southeastward along the Rockies, causing snow to spread from Montana to Colorado, as well as eastward across the northern tier of the Plains during the first half of the week.

Widespread heavy snow is not expected with this storm, but enough could fall to create slippery conditions and exacerbate travel headaches in areas beyond the Midwest and the interior Northeast.

A broad area where 1-3 inches of snow is likely to fall is forecast over much of Montana, Wyoming and central and western Colorado with locally higher amounts.

Denver's forecast snowfall falls in the 1- to 3-inch range, which would make it the biggest storm of the year so far in a season so far that has only brought 0.2 inches of snow, compared to a historical average of 9.3 inches to Dec. 1. The snow in Denver is forecast to begin late Tuesday night and continue into Wednesday afternoon.

Airline passengers should anticipate delays due to slippery runways and deicing operations.