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-