1-90 has been deemed the "dividing line" for snowfall in this storm front which should be bring several inches of snow and strong winds at times.

According to the National Weather Service:

WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING TO 6 PM MDT THIS EVENING FOR ELEVATIONS ABOVE 5500 FEET...

LOCATIONS... BATTLE RIDGE PASS... BOZEMAN PASS... TARGHEE PASS... WEST YELLOWSTONE... BOULDER HILL... ELK PARK PASS... HOMESTAKE PASS... BIG HOLE PASS... CHIEF JOSEPH PASS... MONIDA PASS... FLESHER PASS... MACDONALD PASS... ROGERS PASS... RAYNOLDS PASS.

SNOW ACCUMULATIONS... 2 TO 5 INCHES SOUTH OF I90 WITH UP TO 2 INCHES ALONG THE CONTINENTAL DIVIDE NORTH OF I90.

TIMING... SNOW WILL DEVELOP FROM SOUTH TO NORTH ACROSS SOUTHWEST MONTANA EARLY THIS MORNING AND CONTINUE THROUGH THE DAY BEFORE DIMINISHING THIS EVENING.

IMPACTS... .HAZARDOUS TRAVEL CONDITIONS AS ROADS AND PASSES BECOME SNOWPACKED AND ICY.

WINDS... NORTHEAST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. GUSTS TO 45 MPH AT TIMES ACROSS RIDGETOPS.