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PROFESSIONAL OBSERVATION FORM
 Start Date: 03.25.19 Name: Davis Operation: SAC
 Drainage/Route:  Near Dollarhide Summit Observed Terrain:  6000-8300', Traveled on NW-NE Zone/Region:  Wood River Valley
WEATHER OBSERVATIONS
 HN24: 10 cm HST: 15 cm Sky: VAR Precip: Temps:
 Ridgeline Wind: Light and Intermittent from the SE
 Blowing Snow: None Snow Available for Transport: Small amounts
 Comments: Clear to start the day. Haze, then high clouds moved in before noon but there were some breaks of blue after 1300.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Yesterday 1 N NE 8500 Small wind slab near ridgeline.
 Several Warm Springs Creek Today 1 WL N Mid-elevations. All involving only the recent HST.
 5 Warm Springs Creek Within past week 1.5 WL N S ~7,000 There were about 5 recent WL avalanches pushing D1.5 or D2 that gouged to the ground, most were between Frenchmans and the winter TH for Dollarhide that likely occurred in the past few days, all were on sunnier aspects with thin snowpacks, one is still partially blocking the road.
 Comments: The avalanche that blocks the road at the curve near the base of the SE flank of Shaw is impressive. It'll take a chainsaw and a bit of work before that opens up to allow traffic to the true summit.
SNOWPACK OBSERVATIONS
 HS:  
 Upper Pack: 4-6" moist HST with a crust in the middle.  
 Middle Pack: Stiff MFcr from warm/dry spell.  
 Lower Pack: n/o 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
30 cm

Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Primary Concern Comments: I didn't run into this problem in the terrain I skied but I saw some pockets of fresh wind slab along exposed ridges.
 
Avalanche Characteristics
Character/Avalanche Problem:
Wet Loose

Layer/Depth:
15 cm

Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Problem 2 Comments: Lots of dribblers out of steep rocky terrain involving the recent HST.
 Comments: Did not directly observe upper elevations. No problems at low elevation.
STABILITY TESTS
 Stability Test Results:
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): LOW in the predominately N-facing terrain I was in. Given the small wind slabs in more exposed terrain and the numerous WL on sunnier slopes, I think MOD at middle fits for this area as a whole.
BOTTOM LINE
 Comments: HST increased closer to Dollarhide but there wasn't enough at low elevation to cause any problems. The WL issues at middle and upper elevation were likely to worsen in the PM after I left. It was pretty calm and even the diffuse sun was enough to get peelers involving new snow.
FILE ATTACHMENTS

190326_Dollarhide_SmallSlab.jpg
Small wind slab, 8400' ENE