11th Annual Utah Snow & Avalanche Workshop Open and Motorized Sessions Oct. 27th.
Ad
Observation Date: 
1/9/2018
Observer Name: 
CBrown
Region: 
Salt Lake
Location Name or Route: 
Brighton Periphery/Bonanza Flats/Wasatch State Park
Weather
Sky: 
Obscured
Precipitation: 
Moderate Snowfall
Wind Direction: 
South
Wind Speed: 
Light
Weather Comments: 
Off the ridgelines winds were light gusting to moderate from the south. Moderate snowfall during the day. Snow/rain line seemed to be right about 8,000'. Warm, wet and windy, felt like the PNW.
Snow Characteristics
New Snow Depth: 
7"
New Snow Density: 
Medium
Snow Surface Conditions: 
Powder
Dense Loose
Damp
Snow Characteristics Comments: 

New snow was high moisture content.  At 15:00 I was observing between 4-7" on new dense snow at 9,200' by Silver Lake, East of Clayton peak.  Observed more new snow at a protected NNE at 9,200' than at 9,700 entering the wind zone.  Snow is good base building material, and I wouldn't have been surprised if there was around an inch of water in the new snow.

Red Flags
Red Flags: 
Recent Avalanches
Heavy Snowfall
Wind Loading
Cracking
Collapsing
Poor Snowpack Structure
Avalanche Problem #1
Type: 
Persistent Weak Layer
Trend: 
Increasing Danger
Problem #1 Comments: 

The tipping point is here.  With an estimated inch or more of water in this heavy wet snow we are overloading the strength of the weak snow below.  Surprised by how connected the storm slab was.  I would expect this problem to extend into the weak snow in the mid pack, possibly going close to the ground.  With the density of the new snow and the still shallow pack, I would not want to be involved in taking even a small ride.

Avalanche Problem #2
Type: 
New Snow
Trend: 
Increasing Danger
Problem #2 Comments: 

Although the storm slab is the most observable concern, due to it failing or stepping into the old PWL's this is really a persistent slab problem.  I was surprised by how connected the slab is evidenced by the size of the collapses I was observing.

Comments: 

Road cut avalanches

Today's Observed Danger Rating: 
Considerable
Tomorrows Estimated Danger Rating: 
High
Snow Profile Coordinates: 
Ad

Support the Avalanche Center through your purchases

Discount lift tickets
All proceeds from ticket sales benefit the UAC when you purchase your next lift tickets.
Lift tickets available in November
Need new gear?
Make your next purchase from our Affiliate Partners and the UAC will receive a portion of the sales.
Shop
Sign up for our newsletters, emails and daily forecasts to stay up to date.
Subscribe