A NEW STORM SYSTEM WITH VERY COLD AIR ENTERING THE PACIFIC
NORTHWEST COAST WILL MOVE INTO THE GREAT BASIN THIS EVENING AND
THEN TRACK ACROSS SOUTHERN WYOMING AND NORTHERN COLORADO ON
CHRISTMAS DAY. SNOW WILL LIKELY SPREAD NORTHWARD THROUGH THE
MORNING AND BECOME WIDESPREAD ACROSS THE ENTIRE AREA BY MIDDAY ON
CHRISTMAS. MOST AREAS WILL PROBABLY SEE 2 TO 4 INCHES OF SNOW
EXCEPT ONLY AN INCH OR SO AROUND SHOSHONI. THE MOUNTAINS
INCLUDING THE EAST SLOPE OF THE WIND RIVERS...GREEN AND
RATTLESNAKE RANGES AND CASPER MOUNTAIN WILL SEE 4 TO 6 INCHES.

THE STORM WILL BE ACCOMPANIED BY AREAS OF NORTHEAST WIND 15 TO 25
MPH IN THE AFTERNOON AND EVENING. THE COMBINATION OF TEMPERATURES
FALLING THROUGH THE TEENS AND AREAS OF GUSTY WIND WILL BRING WIND
CHILLS TO BELOW ZERO IN THE AFTERNOON. ROADS WILL BECOME SLICK AND
SNOWCOVERED SO TRAVELLERS ON CHRISTMAS DAY WILL NEED TO BE
PREPARED FOR SNOW...LIMITED VISIBILITY AND SLICK ROADS.