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Observation: Lone Peak

Observation Date
12/30/2019
Observer Name
Grainger, Young
Region
Provo » Lone Peak
Location Name or Route
Lone Peak South
Weather
Sky
Obscured
Weather Comments
Broken fog start, the low stratus ceiling hung around 8000’ and stayed through the afternoon completely obscuring our views of alpine Lone, Bighorn, Box Elder, etc. Quite thick clouds made travel on the south face of Lone Peak difficult.
Snow Characteristics
New Snow Depth
6"
New Snow Density
Low
Snow Surface Conditions
Powder
Red Flags
Red Flags
Wind Loading
Red Flags Comments
Light new snow surface at all elevations 5-9” with mild wind effect. Only concern will be the 2-4” wind slab, likely from strong Christmas Eve winds, that lies under the light snow from last 4 days. This 1F-P slab was present on exposed South faces and if the new snow undergoes faceting and the New Year’s Day storm comes in heavy/with wind, I have concerns for these S faces storm(s) slab running on this windslab bed surface. We were unable to see the extent of new snow sluffing in the steeps.
Avalanche Problem #1
Problem
Wind Drifted Snow
Trend
Same
Avalanche Problem #2
Problem
Persistent Weak Layer
Comments
Windslab under new snow, 1F-P on many S exposures.
Upper red is the noted windslab, lower is the old M/F crust.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low
Coordinates