Close
PROFESSIONAL OBSERVATION FORM
 Start Date: 02.16.19 Name: Lundy Operation: SAC
 Drainage/Route:  Galena Summit/Twin Bowls Observed Terrain:  7900-9100, NE-E-SE Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: Sky: BKN Precip: Temps:
 Ridgeline Wind: Light and Intermittent from the SW
 Blowing Snow: None Snow Available for Transport: Large amounts
 Comments: Clouds increased to OVC in early afternoon with squally periods of S1. Some brief moments of solar input but didn't seem to affect solar aspects.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Camp Creek corner below highway Within past week 2 SS AV NW 8300 Likely plow triggered. ~2-3' feet. Storm slab? Or maybe broke down to 2/2 layer?
 Comments: Had some visibility of the northern Boulders - Cabin Pk, Senate, Gladiator, etc. Would have likely seen a large slide but maybe not smaller wind or storm slabs.
SNOWPACK OBSERVATIONS
 HS: 200cm on 8200-8500' sheltered/shady 
 Upper Pack: 110cm of snow atop 2/2 interface. F- at top to 1F at base of layer 
 Middle Pack: n/o 
 Lower Pack: could feel basal facets in the bottom 20-30cm with a probe. 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
30-60cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Isolated
Terrain
  Primary Concern Comments: Didn't observe upper elevations
 
Avalanche Characteristics
Character/Avalanche Problem:
Deep Persistent Slab

Layer/Depth:
170-180+

Likelihood of Triggering
Sensitivity:
Unreactive

Spatial Distribution:
Widespread
Terrain
  Problem 2 Comments: No deep slabs observed as a result of 2/8 storm.
 Comments: Basal facets are deeply buried and unlikely to be influenced by a rider's weight. Would need to find a shallow/rocky area which is getting tougher - may be confined to the alpine or really gnarly/rocky/steep slopes.
STABILITY TESTS
 Stability Test Results: 8500, N: ECTX in the top 110cm above and including the 2/2 interface
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
FILE ATTACHMENTS

190216_camp_creek_slab.jpg
Camp Creek slab, likely plow triggered