Gallatin and Madison Counties are both under a Winter Weather Advisory for snow and blowing snow.

The National Weather Service in Great Falls has issued a Winter Weather Advisory for snow and blowing snow...which is in effect from 6 PM this evening to noon MST Monday.

Timing and main impact: a strong Canadian cold front will move south through central and southwest Montana this evening...ushering in very cold air and widespread snow through Monday.

Snow accumulations: snow accumulation of 1 to 3 inches is expected in the valleys with 3 to 6 inches in the mountains.

Winds...temperatures and visibility: gusty north winds of 15 to 25 mph are expected behind the front...with temperatures rapidly dropping into the teens. Snow and blowing snow will likely limit visibility below one half mile for a period tonight.

Other impacts: windy conditions and cold temperatures will combine to create very cold wind chills. Gusty north winds behind the front will particularly impact the Norris Hill and Monida Pass areas with a period of blowing snow tonight.

Locations affected include: Bozeman...Dillon...Helena...Three Forks...Townsend...Ennis...Norris Hill...Monida Pass.

A Winter Weather Advisory for snow means that periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities...and use caution while driving.

(photo Michelle Wolfe/KMMS)