While most Americans will be preparing to take their little ones trick-or-treating in a few days, there are some regions that will need to gear up for a Halloween snowstorm.
According to Accuweather.com, a storm will bring wind-driven snow and travel problems to the northern and central Rockies and Plains early next week, before Oct. 31.
The storm will ride a push of cold air moving out of Canada, which could cause temperatures to drop by 20 to 40 degrees each day. As a result, heavy snow will begin falling across Alberta on Sunday, while Edmonton and Calgary can pick up several inches.
For a large part of Montana and Wyoming, part of northern Colorado and at least the western portions of Nebraska and the Dakotas, the snow and wind can be heavy enough to cause dangerous travel conditions Monday.
Accompanied by a vigorous upper-level shortwave trough eventually closing off into an upper low over the Great Basin, snow, possibly heavy, will spread into the northern Rockies, High Plains and possibly parts of the Great Basin Sunday and Monday.
The Weather Channel reports that strong winds behind the front may lead to blizzard conditions in parts of Montana, Idaho, Wyoming and perhaps western South Dakota from late Sunday into Monday.
There is a potential of at least some wet snow to spread farther east into parts of the eastern Dakotas, Minnesota, northern Wisconsin and northern Michigan from late Monday through Wednesday. This storm also has the potential to dump heavy snow over the mountains of Utah and Colorado, with some snow also possible in higher elevations of the Four Corners region, Great Basin and Sierra.
Some snow may also manage to accumulate along parts of the Front Range of Colorado, or farther out on the eastern Plains of Colorado and western Nebraska.