Close
Missoula Avalanche

Professional Observation

Basic Information

Observation Details

Observation Date:
January 26, 2022
Submitted:
January 26, 2022
Observer:
WCMAC - David Fox
Zone or Region:
Central Bitterroots
Location:
Blodgett

Signs of Unstable Snow

Recent Avalanches? 
None Observed
Cracking? 
None Experienced
Collapsing? 
None Experienced

Snow Stability

Stability Rating: 
Very Good
Confidence in Rating: 
High
Stability Trend: 
Steady

Bottom Line

Generally stable conditions.
Above 6,000k, approximately 6" (15cm) of new fist density snow was well bonded to the upper crust.
Moderate SW winds with active snow transport and signs of previous wind loading but no wind slabs or instability.
Multiple crusts sandwiched with lower density snow are present in the upper 15" (35cm) of the snowpack.
Shallow snowpack in the area but didn't find any deep facets in the upper elevations.

Media

Advanced Information

Weather Summary

Cloud Cover:
Clear
Temperature:
30F (-1C)
Wind:
Moderate , SW

Cold temperatures 20-25F (-6 to -4C) in the lower elevation and on shaded terrain. Near freezing 32F (0C) in the upper elevations. Widespread surface hoar in shaded terrain below 6,000k. Winds were calm in the lower elevations but SW at 10-15MPH above 7,000k. Surface snow was being transported in the open exposed terrain and observed signs of previous wind transport.

Snowpack Observations

Height of Snowpack at 7300' was 105cm. Pit was located on a E aspect (80 degrees) with a 28 degree slope.

CT 27 @ 35cm (RP) 1" (2cm) Melt Freeze crust with approximately 3" (7cm) of 4F density snow above and below.
ECTX. No reaction during extended column test.

Close