Winter Weather Coming

The first snowfall in the lower 48 is about to hit a small area of the Glacier Park region, with up to 10 inches of snow expected in areas above 6000 feet.
From the NWS:

WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 2 PM TUESDAY TO
6 PM MDT WEDNESDAY ABOVE 4500 FEET FOR...MARIAS PASS...

A WINTER WEATHER ADVISORY ABOVE 4500 FEET REMAINS IN EFFECT FROM
2 PM TUESDAY TO 6 PM MDT WEDNESDAY.

* IMPACTS/TIMING: A COLD FRONTAL SYSTEM WILL USHER COOLER
  TEMPERATURES AND PRECIPITATION INTO THE AREA LATE TUESDAY AND
  THROUGH WEDNESDAY. SNOW LEVELS WILL BE LOWERING WHILE SNOW
  DEVELOPS IN THE MOUNTAINS BY LATE TUESDAY AFTERNOON. SNOW
  LEVELS WILL CONTINUE TO LOWER TO ABOUT 4000 FEET WEDNESDAY
  MORNING WITH ACCUMULATING SNOW OVER THE HIGHER TERRAIN.

* SNOW ACCUMULATIONS: 5 TO 10 INCHES OF NEW SNOW ABOVE 6000
  FEET...WITH 2 TO 4 INCHES AT THE LOWER ELEVATIONS DOWN TO 4500
  FEET.