Close
PROFESSIONAL OBSERVATION FORM
 Start Date: 11.26.17 Name: Wieland Operation: SAC
 Drainage/Route:  Galena Pk Observed Terrain:  7000-11,000, Northly and Southerly Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 0 HST: 0 Sky: OVC Precip: Temps:
 Ridgeline Wind: Moderate and Gusty from the SW
 Blowing Snow: None Snow Available for Transport: None
 Comments: Wind sustained strong for a few periods.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 4 W & SW Galena shoulder Within past week 1 WL N NW 10,0003
SNOWPACK OBSERVATIONS
 HS: Steep non-wind loaded solars: 30-40cm up to 10k. Did not spend much time on shaded slopes but 100-110cm in pit near ridge @ 10,500 in lightly windloaded terrain. 
 Upper Pack: Alpine SW: 5-10cm P+ surface crust over 1F DF/RG with moist (almost dry somehow) 4F FC on ground. North: A few cms soft wind trans. snow over 2cm P crust.  
 Middle Pack: North: 80-90cm 1F 
 Lower Pack: North: Dry 4cm 4F FC overlying stronger 1F FC 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: Only observed depth of this layer in one pit. Suspect it's not as deep further off the ridge. Terrain is not well connected this early in the season and don't think anything over Sz 2.5 could occur atm.
 
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Unreactive

Spatial Distribution:

Terrain
  Problem 2 Comments: 
STABILITY TESTS
 Stability Test Results: ECTP's in the moderate range (12-18) on FC 10cm from ground.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
BOTTOM LINE
 Comments: Not surprised with basal FC on north. Weaker snow near ground on steep south in alpine more of a surprise however there is a hard, supportable surface crust and little to no slab below. All aspects/elevations supportable on tour with good skiing where surface crust softened below 9500'.
FILE ATTACHMENTS

P1000003.jpg
Small wet loose

P1000004.jpg
Small wet loose