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Archived

Avalanche Forecast

Jan 27th, 2023–Jan 28th, 2023
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
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

Forecast outflow winds will continue to build wind slabs at higher elevations, while buried weak layers continue to demand careful terrain selection.

Confidence

Moderate

Avalanche Summary

No new avalanche activity has been reported since the arrival of the cold, dry weather.

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

Snowpack Summary

In the alpine, recent strong winds and new snow have formed wind slabs in lee terrain features. While at lower elevations a widespread melt-freeze crust exists on the surface up to roughly 1900 m. This crust continues to gain strength and become supportive to travel with cold temperatures. At higher elevations, above 1900 m, surface snow has been redistributed by recent winds.

In the mid and lower snowpack, a number of buried weak layers remain a primary concern. These layers are most concerning in shallow, rocky areas at treeline and alpine elevations.

Weather Summary

Friday night

Mostly clear, no precipitation. Treeline temperatures -5 to -10 C. Moderate outflow winds in the alpine, while much stronger through valleys and inlets.

Saturday

Sunny, with no precipitation. Treeline temperatures -10 to -15 C. Light to moderate alpine winds, with strong to extreme outflow winds in valleys and inlets.

Sunday

Sunny, with no precipitation. Treeline temperatures 0 to -10 C. Light to moderate alpine winds, with strong to extreme outflow winds in valleys and inlets.

Monday

Sunny, with no precipitation. Treeline temperatures 0 to -5 C. Light northwest alpine winds.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be carefull around freshly wind loaded features.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.

Avalanche Problems

Wind Slabs

Expect to find wind slabs at higher elevation where the surface snow is not capped by a melt-freeze crust. Wind slabs may continue to form throughout the alpine with the forecast outflow winds.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

A number of buried weak layers remain possible to trigger. These layers appear to be most problematic in upper treeline/lower alpine elevations, in shallow, rocky start zones.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 3.5