Winter Storm Warning

* WHAT...Heavy snow expected. Total snow accumulations between 10 and 20 inches, with the exception of the Lincoln valley where up to 6 inches is expected. Winds gusting as high as 45 mph.

* WHERE...Gates of the Mountains, Upper Blackfoot and MacDonald Pass, Southern High Plains, and Southern Rocky Mountain Front.

* WHEN...From noon Saturday to 6 AM MDT Monday.

* IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible.

* ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours.