Date issued

Jan 4, 2018 - 3:25 PM

Valid until

Jan 5, 2018 - 2:00 PM

Prepared by

matt.mueller

Overall our snowpack is hanging in there for avalanche problems. The dec 15th layer hasn't proven to be a problem just yet, but we need a bit more time to convince ourselves it is low hazard at treeline.

Regular season
Thursday - January 4, 2018
Alpine

2 - Moderate

Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

Natural avalanches unlikely; human-triggered avalanches possible.

Small avalanches in specific areas; or large avalanches in isolated areas.

Treeline

2 - Moderate

Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

Natural avalanches unlikely; human-triggered avalanches possible.

Small avalanches in specific areas; or large avalanches in isolated areas.

Below Treeline

1 - Low

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Natural and human-triggered avalanches unlikely.

Small avalanches in isolated areas or extreme terrain.

Friday - January 5, 2018
Alpine

2 - Moderate

Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

Natural avalanches unlikely; human-triggered avalanches possible.

Small avalanches in specific areas; or large avalanches in isolated areas.

Treeline

1 - Low

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Natural and human-triggered avalanches unlikely.

Small avalanches in isolated areas or extreme terrain.

Below Treeline

1 - Low

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Natural and human-triggered avalanches unlikely.

Small avalanches in isolated areas or extreme terrain.

Saturday - January 6, 2018
Alpine

2 - Moderate

Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

Natural avalanches unlikely; human-triggered avalanches possible.

Small avalanches in specific areas; or large avalanches in isolated areas.

Treeline

1 - Low

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Natural and human-triggered avalanches unlikely.

Small avalanches in isolated areas or extreme terrain.

Below Treeline

1 - Low

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Natural and human-triggered avalanches unlikely.

Small avalanches in isolated areas or extreme terrain.

Avalanche Problem 1: Wind Slabs

What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?

These are becoming tougher to find as the snow continues to weaken on the surface. Buried slabs may still exist in certain areas.

Travel and Terrain Advice
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Avalanche Problem 2: Loose Dry

What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?

These continue to stay on our radar in bigger terrain, or terrain traps. They are slowly getting better with the warmer temps.

Travel and Terrain Advice
  • Be cautious of sluffing in steep terrain.
  • Avoid ice climbs that are exposed to steep rocky terrain on solar aspects.

Avalanche Summary

A few newer loose dry "facalanches" in alpine terrain.

Snowpack Summary

Surface hoar continues to grow with the chilly, clear nights. Interestingly, there are bands of it from valley bottom to to about 1950 and then as you move higher it shows up again from 2000-2100, and then again at the top of treeline. It could very likely go higher, but we haven't traveled into the alpine lately. Aside from that, the most notable character of the snowpack is the very poor bond in the upper layers. The cold has taken a toll! Today we dug at treeline in the northern part of the region. The Nov crust was down about 60cm and well bonded despite there being facets above and below it. The deeper layers were also well bonded.

Weather Forecast

Relatively warm temps will continue with 2100m temperatures hitting -3 tomorrow.  Skies will become more cloudy tonight, and continue to build as the week end nears. No snow will come with the cloud. Winds will gradually increase to 35km/hr tomorrow. Out of the west.

Danger Ratings Explained

1 - Low

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Natural and human-triggered avalanches unlikely.

Small avalanches in isolated areas or extreme terrain.

2 - Moderate

Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

Natural avalanches unlikely; human-triggered avalanches possible.

Small avalanches in specific areas; or large avalanches in isolated areas.

3 - Considerable

Dangerous avalanche conditions. Careful snowpack evaluation, cautious route-finding and conservative decision-making essential.

Natural avalanches possible; human-triggered avalanches likely.

Small avalanches in many areas; or large avalanches in specific areas; or very large avalanches in isolated areas.

4 - High

Very dangerous avalanche conditions. Travel in avalanche terrain not recommended.

Natural avalanches likely; human-triggered avalanches very likely.

Large avalanches in many areas; or very large avalanches in specific areas.

5 - Extreme

Avoid all avalanche terrain.

Natural and human-triggered avalanches certain.

Large to very large avalanches in many areas.

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