New snow on Hwy 108

Location Name: 
New Snow on Hwy 108
Date and time of observation: 
Fri, 02/10/2017 - 13:45
Location Map: 

Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain

Observation made by: Avalanche Specialist
Snowpit Observations
More detailed information about the snowpack: 

We rode up Hwy 108 to check conditions in the BWRA.  Lower part of road has several sections where the snowpack has been washed out from flowing water, be cautious when riding the first couple miles from the People's Gate.  New snow amounts increased greatly as we got above 7500'.  We made it to 8200' and had to turn around due to heavy and deep new snow.  Road was ungroomed.

Dug a quick pit and found 28" of new snow.  New snow was upside down with dense snow on to of a layer of lower density snow.  New snow was on top of rain saturated snow and appeared to be bonding well to the wet snow surface.  Stability tests showed new snow collapsing with very little force (CT1), due to the upside down nature of the snow.

On the way out we came across a small slide from a steep slope above the road that put debris across our previous tracks.  The heavy new snow likely overloaded the lighter snow below it.  I expect this upside down new snow to pose some problems in terms of avalanche danger this weekend.  Will take some time for this instability to settle out. 

Snowpack photo captions:

Photos 1 & 2:  Washed out sections of Hwy 108

Photos 3:  28" of heavy new snow around 8200' on the road, too much for our sleds

Photos 4:  Small avalanche on steep slope above road

Snowpit or crown profile photo or graph: 
Snowpack photos: