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Avalanche Forecast

Dec 20th, 2022–Dec 21st, 2022
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Very cold temperatures are likely the biggest hazard in the backcountry right now. Make conservative plans, even a small accident can have big consequences.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported in the past few days.

If you are headed into the backcountry please consider filling out a Mountain Information Network report.

Snowpack Summary

The upper snowpack at treeline and above is made up of wind effected surfaces and loose faceted snow in sheltered terrain.

The main layer of concern is the mid-November layer, which is made up of either surface hoar, facets, or crusts. It is now buried 40 to 80 cm deep. Avalanche activity on this layer has tapered off but it could still be possible to trigger this layer in isolated terrain features near treeline.

Alpine snowpack distribution is variable, with depths ranging from 70 to 140 cm.

Weather Summary

Tuesday Night

Flurries bringing trace amounts of new snow with light winds shifting from west to northeast by the morning. Low of -31 at -2000m.

Wednesday

Mostly sunny with no new snow expected. Light northeast winds and a high of -29 at 2000m.

Thursday

Mostly sunny with no new snow expected. Light variable winds and a high of -31 at 2000m.

Friday

Cloudy with trace amounts of new snow expected. Southwest winds increasing throughout the day. High of -25 at 2000m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.

Avalanche Problems

Persistent Slabs

A layer of surface hoar, facets and, a crust from mid november is buried around 40 cm deep but can be found down as much as 80 cm. This layer is becoming increasingly hard to trigger but could still be sensitive to rider traffic on isolated slopes at treeline where the snow above feels stiff and consolidated.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely

Expected Size: 1.5 - 2.5

Wind Slabs

Wind slab could be found in isolated features on all aspects in the alpine. These slabs could be more reactive where they overlie facets.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 1.5