Mountain passes could get very messy today in southwest Montana as heavy, wet snow is expected to fall along with strong, gusty winds until midnight.

According to the National Weather Service:

  • WINTER WEATHER ADVISORY IN EFFECT FROM 9 AM THIS MORNING TO MIDNIGHT MDT TONIGHT FOR ELEVATIONS ABOVE 6000 FEET.
  • TIMING AND MAIN IMPACT: SNOW WILL BECOME WIDESPREAD BY THIS AFTERNOON AT AND ABOVE MOUNTAIN PASS LEVEL ACROSS SOUTHWEST MONTANA. MOUNTAIN PASSES WILL LIKELY BECOME SLICK AND SNOW COVERED IN SPOTS... CAUSING HAZARDOUS DRIVING CONDITIONS. HEAVIER SNOW SHOWERS WILL ALSO REDUCE VISIBILITY AT TIMES.
  • SNOW ACCUMULATIONS: 1 TO 3 INCHES OVER MOUNTAIN PASSES AND IN THE WEST YELLOWSTONE AREA... 3 TO 6 INCHES IN THE MOUNTAINS ABOVE PASS LEVEL. LESS THAN ONE INCH OF SNOW IS EXPECTED IN MOST OTHER VALLEYS.
  • WINDS AND VISIBILITY: WEST WINDS OF 10 TO 20 MPH WITH GUSTS OF UP TO 30 MPH WILL DEVELOP ACROSS SOUTHWEST MONTANA SOUTH OF INTERSTATE 90 THIS AFTERNOON. THIS MAY REDUCE VISIBILITY TO LESS THAN ONE MILE AT TIMES IN BLOWING SNOW OVER SOME MOUNTAIN PASSES.
  • ELEVATIONS: FOR ELEVATIONS ABOVE 6000 FEET.
  • LOCATIONS AFFECTED INCLUDE: BATTLE RIDGE PASS... TARGHEE PASS... WEST YELLOWSTONE... BOULDER HILL... ELK PARK PASS... HOMESTAKE PASS... BIG HOLE PASS... CHIEF JOSEPH PASS... MONIDA PASS... KINGS HILL PASS... FLESHER PASS... MACDONALD PASS... RAYNOLDS PASS.
(photo Michelle Wolfe/KMMS)