Avalanche

Ten Lakes

Rob MillspaughWhitefish Range
View on map
Observation photo 1Observation photo 2Observation photo 3Observation photo 4

Quick report

With some uncertainty regarding expected snowfall, we considered several different plans for the day and decided to let the conditions on the ground dictate our travel. 

  • We found less snow and wind than anticipated, so we executed our most ambitious plan. 
  • Our time above tree line was limited by very poor visibility above 6500 feet.
  • Recent snow consists of 4 inches and rests on a thin and fragile crust/facet combination. 
  • The snow surface in wind-exposed terrain had been stiffened slightly by recent winds, but slabs were not reactive where we traveled.
  • Old (hard) wind slabs were evident in our pits and made for some punchy riding above treeline,  though these were also unreactive.
  • We found the well-documented buried surface hoar (layer) 2.5-4 feet deep in all of the pits.  It was not reactive in pit tests.  
  • We observed many sled tracks near and below tree line without any signs of instability.

Plenty of people out enjoying some holiday riding!

 

No obvious signs of instability

Weather

Air Temp
30
Cloud Cover
obscured
Wind Loading
previous
Rain Elevation
3500
Recent Snowfall
10

A few short pulses of moisture throughout the day with rates approaching S1 at times. Only a couple light SW gusts. Socked in above 6500 feet.

Snowpack

Pit @ 6800' NE: 

  • HS = 215 cm
  • ECTN16 Down 40 cm, ECTN24 down 70cm
  • Surface hoar (12/7) down 120 cm (ECTX)

Pit @ 6600' N:

  • HS = 185 cm
  • Unreliable test results due to vegetation in pit
  • Surface hoar (12/7) down 80 cm

Pit @ 6000' NW:

  • HS = 150 cm
  • Surface hoar (12/7) down 70 cm

 

Avalanche

No recent avalanches. Maybe saw an old crown near Saint Clair Peak from last week's storm. Visibility was poor and it's possible it was a sled track.