Observation: Boiler Bowl

Observation Date
01/2/2017
Observer Name
Weed

Region:

Location Name or Route
Boiler Bowl
Weather
Sky
Obscured
Precipitation
Moderate Snowfall
Wind Direction
West
Wind Speed
Moderate
Weather Comments
Considerable drifting... Snowfall and winds tapering off in the afternoon. Cold with poor visibility of surounding high country for most of the day.
Snow Characteristics
New Snow Depth
7"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments

Fine powder riding and skiing.

Red Flags
Red Flags
Heavy Snowfall
Wind Loading
Cracking
Red Flags Comments
light new snow not holding together as a slab
Avalanche Problem #1
Type
Wind Slab
Trend
Increasing Danger
Problem #1 Comments

Noted significant drifting and some cracking in drifted snow, but could not get any drifts to propagate as wind slabs.  

Cornices were rapidly building and sensitive.  I almost fell off one on a short test slope when it unexpectedly broke further back than I expected.

Avalanche Problem #2
Type
Storm Slab
Trend
Same
Problem #2 Comments

The new snow wasn't sticking together enough to form a slab in the Steam Mill Area.  The new snow probably preserved a weak layer consisting of surface hoar and/or near surface facets in many areas, but this was not active on the slopes we looked at.

This will turn into a persistent slab problem as more snow accumulates and the slab consolidates on top of the weak snow.

Snow Profile
Aspect
North
Elevation
9000
Slope Angle
23
Comments

We found mostly stable snow, since the light new snow was not sticking together to form a slab.  Wind slabs just becoming cohesive in drifted areas near the ridge top.   Cornices were quite sensitive

Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Snow Profile Coordinates