Winter Weather Advisory issued December 29 at 4:35AM MST until December 30 at 5:00AM MST by NWS Boise ID

* WHAT…Snow. The snow will mix with or change over to rain at
times in the lower valleys as snow levels rise to 5000 to 6000
feet before lowering back down to valley floors this evening.
Additional snow accumulations will vary considerably in the
valleys, generally ranging from 1 to 4 inches, but locally higher
amounts are possible. Additional snow accumulations in the
mountains (mainly above 6500 feet) of 6 to 12 inches are expected.
Winds gusting as high as 35 mph.

* WHERE…Boise Mountains and West Central Mountains.

* WHEN…Until 5 AM MST Monday.

* IMPACTS…Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Travel could be very difficult
to impossible.