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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.10.19 Name: Lundy (Off Duty) Operation: SAC
 Drainage/Route:  Cross Area Observed Terrain:  8400-9400' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: 40cm? Sky: OVC Precip: Temps:
 Ridgeline Wind: Moderate and Intermittent from the S
 Blowing Snow: L Snow Available for Transport: Large amounts
 Comments: Wind decreased through the day and eventually shifted more westerly in the afternoon. Temps decreased as well. By 1600, skies became BKN. HST was low density but more on the order of 5% - didn't seem as light as in the WR Valley
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 5+ Road cuts above highway Today 1 SS AM several small storm slabs on steep road cuts, plow triggered
 1 Steep slopes above and E of camp creek pullout Today 1 SS N NW 8800 shallow storm slab
 1 knob on avy peak E ridge Today 1 SS N SE 8800 small
 Comments: Storm slabs were 20-25cm deep and appeared to be breaking within storm snow. Had some visibility and decent light this afternoon - wasn't glassing but didn't see any obvious, large slides in the Boulders or upper Titus area.
SNOWPACK OBSERVATIONS
 HS:  
 Upper Pack: ~40cm HST, mid storm shear about 20-25cm down in hand pits 
 Middle Pack: n/o 
 Lower Pack: n/o 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
up to 60cm

Likelihood of Triggering
Sensitivity:
Reactive

Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: Widespread wind effect in mid elevation open terrain. Some small, sensitive drifts and touchy cornices.
 
Avalanche Characteristics
Character/Avalanche Problem:
Storm Slab

Layer/Depth:
20-25cm

Likelihood of Triggering
Sensitivity:
Reactive

Spatial Distribution:
Widespread
Terrain
  Problem 2 Comments: As evidenced by road cuts and at least one natural
 Comments: No observations on persistent slab problem. Would anticipate a more significant wind slab problem in true upper elevation terrain or along more defined ridges.
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)    
 Collapsing (isolated)    
 Comments: Cornices were touchy. Got one collapse and crack stomping a decent size wind drift.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
FILE ATTACHMENTS

190210_galena_road_cut.jpg
Road cut storm slab avalanche near Cross parking lot. Likely plow triggered