Observation: White Pine Gulch

Observation Date
1/4/2019
Observer Name
Zimmerman-Wall/Chovan/Denney
Location Name or Route
White Pine, LCC
Red Flags
Red Flags
Recent Avalanches
Wind Loading
Avalanche Problem #1
Problem
Wet Snow
Trend
Same
Problem #1 Comments
Warm temps the last few days have made this problem a reality in certain terrain features of consequence. Loose wet avalanches were visible from yesterday along steep, rocky outcroppings. We left the drainage before seeing any activity today.
Avalanche Problem #2
Problem
Wind Drifted Snow
Trend
Same
Problem #2 Comments
The SW winds were gusting up into the moderate range today and moving snow along the surface. No instabilities noted during our morning tour. Winds ahead of next storm may continue to load certain terrain features.
Comments
Tour was from Snowbird into White Pine Drainage. Skies were clear with a few lenticular clouds to the South. The South and West facing slopes >20 degrees were a cornucopia of crusts waiting to take down the unwary skier. North facing sheltered terrain below 10,000 feet harbored some great skiing. Particularly 25-30 degree slopes where you could surf small features. Windboard in a lot of places, and rocks in others, made it difficult to trust more than 20 turns at a time. Along the up-track to Boulder Basin we dug in a sheltered deep pocket of snow (HS 185) to observe the undisturbed upper meter of the snowpack. There were two distinct layers that could be a concern if a large load of snow/water comes our way. Down 30cm from surface there are some faceted stellars that produced clean/moderate fractures. Down 55cm from surface were NSF buried just before Christmas that produced clean/hard fractures. Current snow surface is mixed bag, but there are quite a few areas of surface hoar and surface facets mixed in with the wind effect.
FORECASTER Note: Thanks for the ob, Sean and team
Photos:
1. Upper meter of snowpack.
2. Surface hoar growing in sheltered terrain. Up to 10mm in size. Will likely be destroyed by wind
3. South Facing LCC- Lots of wet slides in the chutes above road.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low