A rain – snow mix will redevelop over most of Wyoming today, spreading eastward across western South Dakota, south Montana and southwest North Dakota tonight. Snow levels will drop to 3200 feet tonight across SE Montana, NW South Dakota, NE Wyoming and the Black Hills. The heaviest snow will fall in a band about 50 miles wide from Kaycee Wyo. to Buffalo  SoDak where as much as a foot will accumulate.

The heavy snow will spread northeast Sunday along and axis through Bismarck and Devils Lake.  Snow showers will be scattered across Montana Sunday.  Scattered rain showers will be over  most of Wyoming below 5000 ft, except over the far north and northwest here rain showers will be mingled with snow showers. Western South Dakota, south of the main band of snow, and central South Dakota, will have a mix of rain and snow showers.

There will be a threat of rain and snow showers most of next week, mainly across Montana, Wyoming and North Dakota. Temperatures will average 5 degrees below normal.