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Archived

Avalanche Forecast

Jan 27th, 2024–Jan 28th, 2024
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Avalanche hazard may rise quickly with snowfall, warming temps and increasing wind.

Minimize your overhead exposure during periods of heavy snow, and if the surface snow is switching from dry to moist/wet.

Confidence

No Rating

Avalanche Summary

A field team observed a few small loose snow avalanches in steep terrain on Glacier Crest Saturday.

Avalanche control just West of the park produced one size 3 storm slab avalanche in a large Southerly feature on Friday.

We observed isolated naturals in the highway corridor over the last week, triggered by southerly winds at upper elevations, and high freezing levels in valley bottom avalanche paths.

Snowpack Summary

New snow, warm temperatures and wind at upper elevations continues to build storm slabs.

A sun crust (Jan 3), down 50-70cm, can be found at and below Tree-line on S-SW aspects, and has been a failure plane for a few recent human triggered avalanches.

The Dec 1 surface hoar layer is down ~110cm and is decomposing.

Weather Summary

A frontal system impacts the interior early Sunday, bringing rising freezing levels, moderate snowfall and SW wind.

Tonight: Snow (10cm), Alpine low -2°C. Moderate SW ridgetop winds. Freezing level (FZL) 1700m

Sunday: Scattered flurries (5cm). Alpine High 0°C. Mod-strong SW winds. (FZL) 2000m

Mon: Isolated wet flurries. Low 0°C, High 4°C. FZL 3000m.

Tues: Isolated flurries. Low -5°C, High 5°C. FZL 2500m.

Terrain and Travel Advice

  • Minimize exposure during periods of heavy loading from new snow and wind.
  • The more the snowpack warms-up and weakens, the more conservative you`ll want to be with your terrain selection.

Avalanche Problems

Storm Slabs

Ongoing snow, South winds, and mild temps continue to build a slab that is thicker and more reactive in windloaded lee features.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5

Loose Wet

Expect loose snow avalanches in steep terrain, as freezing levels continue to rise.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Likely

Expected Size: 1 - 2