11th Annual Utah Snow & Avalanche Workshop Open and Motorized Sessions Oct. 27th.
Ad
Observation Date: 
1/11/2016
Observer Name: 
Hardesty
Location Name or Route: 
UFO Bowls
Weather
Sky: 
Few
Wind Direction: 
Northwest
Wind Speed: 
Moderate
Weather Comments: 
Plumes noted along the high Timp massif; however many areas (including ours) are protected from the northwesterlies. Cold in the draws and canyons along the east side of Timp; temps there in the single digits. Surface hoar noted perhaps more prominently at higher elevations and this (speculatively) attributed to Sunday's alto-stratus. Large stellars noted on the snow surface; SH growing on some of the arms - pics below.
Snow Characteristics
New Snow Depth: 
12"
New Snow Density: 
Medium
Snow Surface Conditions: 
Powder
Damp
Snow Characteristics Comments: 

A+ skiing and riding conditions.  Southerly aspects affected by the sun briefly yesterday; though full brunt peeled out some longer running size 1&2 WL on Timp today on south/southwest.  

Last week's 18" settled to 12".  

Red Flags
Red Flags: 
Recent Avalanches
Rapid Warming
Poor Snowpack Structure
Avalanche Problem #1
Type: 
Persistent Weak Layer
Trend: 
Increasing Danger
Problem #1 Comments: 

Problems with repeaters from the pre-Christmas cycle.  10-15cm of very weak snow not cleaned out by cycle.   40cm or so of new sits above this old layer.  Holy Toledo, El Rollo, likely Upper Days serve as indicators of repeater activity.  At 9600' northeast near the UFO Bowl/Primrose ridgeline, the other avalanche professional and I didn't love the set-up and turned around.  Professional over personal risk assessment.  

We also dug at 8500' northeast facing with HS of 120cm; seemed to have gained quite a bit of stability over the weeks...Profiles below.

Increasing danger below is attributed to winds likely seen elsewhere that may have made this repeater structure more unstable. 

Snow analysis done in this repeater in the South UFO Bowl, below

Avalanche Problem #2
Type: 
Wet Snow
Problem #2 Comments: 

Low density snow, steep sustained terrain, first heating of direct sun.  Never mind temps remained in the teens...

Snow Profile
Aspect: 
Northeast
Elevation: 
8500
Slope Angle: 
25
Comments: 

Photos below:

4-5mm Stellars that were originally mistaken as surface hoar

SH growth on said stellars

Primrose Cirque pocket

Ski tracks adjacent to naturals from end of 18" storm Jan 5-8th

‚ÄčNorthwest winds

Skier triggered sluffs on Bob's Knob above Aspen Grove

Surface Hoar

Today's Observed Danger Rating: 
Moderate
Tomorrows Estimated Danger Rating: 
Moderate
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