Traveling in Montana this holiday week could be treacherous through mountain passes with very heavy snow. Being prepared is the key and knowing when NOT to be on the roads can help everyone have a safe couple of days.

Thanksgiving Day (at this point) is supposed to be pretty nice with mostly sunny skies and daytime highs in the 40s. Leading UP TO the holiday is not looking good.

According to the National Weather Service:

The National Weather Service in Great Falls has issued a Winter Storm Watch...which is in effect from late tonight through Wednesday evening.

Timing and main impact: snow and blowing snow will develop over the region tonight. Periods of heavy snow are expected through Wednesday at higher elevations. Travel will be become difficult at times.

Snow accumulations: 10 to 18 inches total accumulation at higher elevations with 4 to 8 inches expected at lower elevations.

Winds and visibility: the combination of falling snow and gusty winds will create widespread blowing snow...with visibility less than one half mile at times.

Locations affected include: Battle Ridge Pass...Bozeman... Bozeman Pass...Targhee Pass...West Yellowstone...Townsend... Flesher Pass...Helena...Lincoln...MacDonald Pass...Rogers Pass

Winter Weather Advisory in effect through Wednesday (photo Michelle Wolfe/KMMS)