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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.31.18 Name: VandenBos - OFF DUTY Operation: SAC
 Drainage/Route:  Glassing en route to powder skiing Observed Terrain:  easy pickins visible from the road Zone/Region:  
WEATHER OBSERVATIONS
 HN24: HST: Sky: Precip: Temps:
 Ridgeline Wind:
 Blowing Snow: Snow Available for Transport:
AVALANCHE OBSERVATIONS
None Reported
STABILITY TESTS
 Stability Test Results:
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
BOTTOM LINE
 Comments: Lots of activity from this recent loading, particularly from Headwaters area up thru Banner. Most activity occurred during the storm with the exception of the slide up Cabin Creek reported by Ethan and a handful of slides in the area from Elk Creek north to Banner. These slides appear to have happened right at the tail end of the storm as the wind was slowing and running out of easy snow to move. Elk Creek to Banner was the area with the most activity, not terribly surprising given the distribution of snowfall. These northern Sawtooths crowns were reasonably deep, hard to know if they were picking up any layers deeper than 12/29 interface without visiting the crowns.

Most activity appeared to be limited to wind loading issues, though the slide in Cabin Creek is an interesting outlier. Always thought-provoking to see slides like that right at the end of loading events when those last 10,000 snowflakes push it over the edge. Other potential, though much less convincing outliers include a mid-slope crown on Williams, some chunky debris and potentially a mid-slope step down on Pilgrim (really tough to know on this one, looks like it happened pretty early in the loading), some big debris piles with mid-slope crowns (?) on Silver , and a big pile up the North Fork of the Big Wood. Interesting to see such large slides in the Boulders with so little snow and gusty winds. Man, if it ever actually snows....

FILE ATTACHMENTS

181231_NFkBigWood.jpg
North Fork Big Wood

181231_Silver.jpg
Silver Peak

181231_Pilgrim.jpg
Pilgrim Peak

181231_Williams.jpg
Williams Peak

181231_SwampLakePeak.jpg
Swamp Lake Peak