11th Annual Utah Snow & Avalanche Workshop Open and Motorized Sessions Oct. 27th.
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Observation Date: 
12/17/2017
Observer Name: 
Tyler Falk / AAI Level 1
Region: 
Salt Lake
Location Name or Route: 
Catherine's Pass
Weather
Sky: 
Few
Wind Direction: 
Northwest
Wind Speed: 
Calm
Weather Comments: 
Valley temperatures this morning were in the high 20's while Alta was around 11 degrees at 730am. Sky cover was clear in the morning which gave way to a few clouds in the afternoon. High temps at 8500' toped out at 22F. Very light S1 snowfall accompanied the brief moments of cloud cover.
Snow Characteristics
New Snow Depth: 
2"
New Snow Density: 
Low
Snow Surface Conditions: 
Powder
Snow Characteristics Comments: 

Alta reported 1.5" of snow @ 4.7%. Better than nothing but still below average for SWE.

NRCS Numbers.....

Snowbird 80% Median

Brighton 84% Median 

Thaynes 82% Median

 

Red Flags
Red Flags: 
Poor Snowpack Structure
Comments: 

Spent the last two days up in Catherine's pass with the AAI level 1 class. Similar findings to Greg's observation in terms of structure and our weak layers. No propagation in ECT's. Test results were showing weaknesses in the thanksgiving crust and faceted graupel layer (Q3's).  Small shallow windslabs possible on high east from overnight winds which were in the teens on 10k ridgelines. Aspect has a large effect on height of snow at the moment and anything not north facing and below 9500' has very little snow. 

Currently: Poor Structure, Moderate Strength & Low Propagation Propensity

Pic 1. Pit at 10,100 on a NE aspect. HS: 102cm

Pic 2. Pit at 10,200 on a NW aspect HS: 70cm  Graupel layer very well defined.

Today's Observed Danger Rating: 
Low
Tomorrows Estimated Danger Rating: 
Low
Snow Profile Coordinates: 
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