Or, as The Weather Channel says, there's going to be a "Halloween week snowstorm." Already, it reports, "snow is spreading or will spread into the interior Northwest, northern Rockies, adjacent High Plains and parts of the Great Basin and Sierra Nevada."
The channel adds that:
"The heaviest accumulations over the next 48 hours should occur in parts of western and central Montana and the mountains of northern Wyoming. Some moderate accumulations are also expected in western South Dakota."