US Forest Service - 

WESTERN WYOMING AVALANCHE ADIVSORY
Issued on Sat January 26, 2013 4:38 PM    

SITUATION

Overcast skies prevailed Saturday with light snow above 7500 feet and areas with rain showers as 
high as 8000 feet. Snow accumulations reached one half to two inches. Mountain temperatures at 
9,500 feet were within a few degrees of freezing. Ridge-top winds were southwesterly at 15 miles 
per hour in the morning slowing to five in the afternoon. The new snow is falling on a variety of 
weak surfaces: Wind pack on exposed, upper elevation slopes, sun crusts on sunlit slopes and 
faceted snow on northerly and lower elevation slopes.

FORECAST FOR Sunday, January 27, 2013

Light snow will continue through Sunday. Accumulations of three to five inches of snow by Sunday 
evening are expected in the mountains and a trace to one inch on the valley floors. Sunday 
temperatures will remain in the low 20s and ridge top winds will be southwesterly at 10 miles per 
hour. The avalanche hazard is expected to be LOW Sunday morning and may rise to MODERATE in the 
afternoon. The new snow falling on weak, slick surfaces will create the possibility for easily 
triggered soft slabs or sloughs to a foot in depth by the evening. New slides may increase the 
potential of releasing isolated pockets of older slab in very steep, rocky terrain at upper e
levations.