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PROFESSIONAL OBSERVATION FORM
 Start Date: 01.20.19 Name: Lundy, Weeks, Radecky Operation: SAC
 Drainage/Route:  Salmon Headwaters Observed Terrain:  7400-8200' (Motorized L1 class) Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 10cm? HST: 20-25cm? Sky: X Precip: S1 Temps:
 Ridgeline Wind:
 Blowing Snow: L Snow Available for Transport: Large amounts
 Comments: Weather was initially overcast this AM in the Sawtooth Valley but quickly deteriorated around 11am. After that storm conditions prevailed. S1 began around 1100, becoming S2 later in the day. Estimated 7cm of new during the time were in the field (1100 - 1530). HN24 and HST hard to guesstimate. We had moderate winds at mid elevations, didn't get to ridge level.
AVALANCHE OBSERVATIONS
None Reported
 Comments: Generally poor visibility
SNOWPACK OBSERVATIONS
 HS: 125cm at 8200' at the Salmon/Big Smoky Divide. Obs below are from this area. 
 Upper Pack: HST and recent snow, right side up, no obvious WL 
 Middle Pack: On a solar aspect, a group found FC above and below a MFcr 45cm down 
 Lower Pack: 1F to P near base of slab (100cm down)
15-20cm 4F to 4F+ FC 2-3mm. Seemed stronger than what I saw on Copper.
 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Deep Persistent Slab

Layer/Depth:
basal/100cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: Forecasted location. Problem seemed unreactive based on our pits, but we were in one location with possible past sled traffic. Based on riding feel and several riders getting stuck, the basal weakness was common in most of the terrain we traveled through.
 Comments: We observed some minor blowing snow and drifting even at mid elevation, so suspect a wind slab problem up high.
STABILITY TESTS
 Stability Test Results: The only significant test result was an ECTP on a crust with some FC 45cm down (probably buried 1/15). Several tests produced ECTX and CTN or CTH on basal FC.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): Reluctant to estimate danger based on limited obs and being focused on teaching. Our pits were dug in a convenient/accessible location vs. looking specifically for the problem.