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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.03.17
 Drainage/Route:  Mushroom, gladiator summit Observed Terrain:  10- 7.5K, E, S , W. Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 15-20cm HST: 15-20cm Sky: OVC Precip: S2 Temps:
 Ridgeline Wind: Moderate and Intermittent from the W
 Blowing Snow: L Snow Available for Transport: Large amounts
 Comments: Snowy in am, breaking mid day, s1-3 1600pm. Winds WNW in am , S in pm. Light transport all day, even at glad summit.
AVALANCHE OBSERVATIONS
None Reported
 Comments: No slides observed, poor light however.
SNOWPACK OBSERVATIONS
 HS: 50-70cm 
 Upper Pack: 15-20 new, 5-8 in pm. 10-20cm pre 12/2 snow on pencil crust. This layer is loose small FC in shade, and sun affiected on steep S. Anywhere from just a little to denser, to having a crust.  
 Middle Pack: Pencil crust over FC over weaker crust,. 
 Lower Pack: Settled old FC, moist. I’d not travel on terrain where this could be loose dry garbage.  
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
15-30cm

Likelihood of Triggering
Sensitivity:
Unreactive

Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: New generally sitting on weak snow on perfect bed surface. Cracked a little around skis, more so late in day.
 
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
20-40

Likelihood of Triggering
Sensitivity:
Not Observed

Spatial Distribution:
Specific
Terrain
  Problem 2 Comments: Expected to see sensitive pockets on gladiator. None observed. Terrain not as winded as I expected
 Comments: A couple more tenths of SWE and I think that we’d have a widespread cycle, of new and old snow running on crust. Likely to run over average far.
STABILITY TESTS
 Stability Test Results: Hand pits only
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)   Length: 50cm
 Comments: Very quiet day. Mushroom is always less winded than Titus or main boulders. Was surprised by a sense of wind affect on gladiator.
SNOW STABILITY
 Snow Stability Rating for your observed area: Good Confidence: HIGH Trend: Worsening
 Comments (aspects and elevations of instability, etc): I’m saying worsening, as it was still snowing hard on our exit at 1630. Things might be different in the morning with more load and wind.
BOTTOM LINE
 Comments: Surface snow will stabilize quickly if no significant load or wind affect happens. The crust is unusual for us and hence may produce unusually long running avalanches. Our snow quality was high and sluff prone. That also is unusual. Large steep terrain could produce long, and hence large stuffs.