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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.28.18 Name: Lundy Operation: SAC
 Drainage/Route:  Williams Peak East Shoulder Observed Terrain:  6300-9400', SE-E-NE Zone/Region:  Sawtooth Mountains
WEATHER OBSERVATIONS
 HN24: HST: Sky: CLR Precip: Temps:
 Ridgeline Wind: Moderate from the NW
 Blowing Snow: L Snow Available for Transport: Small amounts
 Comments: Light wind transport along the ridge near Skier's Summit. Stayed relatively cold.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Marshall Basin Today 1 WL N S
 Comments: Hut renters reported seeing a wet loose on a steep solar aspect today. It's possible it was a solar induced dry loose but they said it was slow moving. Very small either way. Surprising as it felt cold despite the sun.
SNOWPACK OBSERVATIONS
 HS: 40cm on valley floor up to 120cm at mid/upper elevations 
 Upper Pack: Surface is becoming faceted. Ski pen is ~20cm. 
 Middle Pack: Stout mid pack with generally 4F to 1F near basal facets. Some P mid pack in wind affected areas. 12/11 SH observed in a shady/sheltered pit E, 8400'. 
 Lower Pack: 11/22 FC 2-3mm F+ on shady slopes mid elevation and above. 12/11 FC 1-2mm 4F on Solars 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
12/11 & 11/22 basal FC, 80cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: 
STABILITY TESTS
 Stability Test Results: Pits at 8400',E and 9400', SE both produced ECTX's.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): Borderline Low danger at mid elevations - the poor snowpack structure remains concerning but is almost unreactive.
BOTTOM LINE
 Comments: Snowpack in this area is deeper and stronger than the Smoky/Boulders and is very similar to Copper. Primary concern remains very steep, upper elevation, wind affected terrain where a stiff slab lies above facets.
FILE ATTACHMENTS

Marshall Basin Resized.jpg
Marshall basin wind effect