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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.26.18 Name: VandenBos Operation: SAC
 Drainage/Route:  Titus Observed Terrain:   Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: Sky: Precip: Temps:
 Ridgeline Wind:
 Blowing Snow: Snow Available for Transport:
 Comments: Late afternoon tour. Skies clearing an hour before sunset with low clouds moving over the pass from the Salmon River side. Temps dropping as skies cleared, light winds out of the NW. Tough to say exactly how much snow fell, but seems like more than the 5-6 that lower Titus is reporting, maybe closer to 8+"?
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Verlons Today 2 SS SE 8,900'
 1 Boulder Today 3 SS S 10,200'
 1 Gladiator Cr Today 2 SS SW 9,800'
 2 Titus 1 SS AS E 9,500'
 Comments: Only reporting avalanches that I got good eyes on, but there seemed to be a decent bit of debris hanging around in the Boulders. Never really got a clear view of most of the Mushroom/Gladiator terrain, or the high Boulder terrain but I'd imagine that there are a number of fresh slides up there. No clear view into Salmon River headwaters terrain or Sawtooths.
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Primary Concern Comments: In my observed terrain today this was really more of a persistent problem than a wind slab problem, but that would quickly change with some additional wind or in upper elevations that had seen more wind. Light winds were capable of transporting the low density fresh snow but were a bit lighter than forecast and not quite enough to really build reactive slabs in the terrain near Titus. I'd imagine that its a pretty different story in true upper elevation terrain in the Sawtooths and Boulders.
 
Avalanche Characteristics
Character/Avalanche Problem:
Dry Loose

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Problem 2 Comments: Did not encounter, but did not enter steep terrain. Would be an issue on steeper slopes. Seems unlikely to transition to widespread wet loose problem with such cold temps forecast but it is almost March and then sun is high enough in the sky to put some serious energy into the snow, particularly in rocky terrain sheltered from the wind.
 Comments: Wind slabs would quickly become a serious problem in their own right with an increase in wind speeds. Persistent slabs are much more likely to be a problem in areas that have seen some additional wind loading.
STABILITY TESTS
 Stability Test Results:
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
FILE ATTACHMENTS

DSC_0597.JPG
Boulder Peak, SSE aspect, 10,200'

P1040024.JPG
Verlons

P1040039.JPG
Verlons

P1040046.JPG
Titus

P1040084.JPG
Gladiator, SW aspect, 9800'