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Archived

Avalanche Forecast

Jan 17th, 2019–Jan 18th, 2019
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Natural and human triggered avalanches have declined, but wind slabs still linger above treeline. Avalanche hazard will increase with the arrival of an intense storm on Saturday.

Weather Forecast

The high pressure ridge begins to break down today. Expect cloud, sunny periods and isolated flurries. A weak temperature inversion is in place, however temperatures will remain below freezing at all elevations. Winds are light from the east with trace amounts of precipitation. A low pressures system arrives late Friday with up to 25cm of snow.

Snowpack Summary

A temperature inversion has promoted snow settlement at treeline and alpine elevations. Hard wind slabs are present in alpine areas exposed to downflow winds. A crust has developed on steep solar aspects, while surface hoar has been observed up to 20mm in sheltered areas. The Nov 21 persistent weak layer is down ~180cm.

Avalanche Summary

No new avalanches were observed.

Confidence

Avalanche Problems

Wind Slabs

Wind slabs are present on lee features in the alpine and exposed areas that have been subjected to downflow winds. These slabs tend to make for challenging skiing conditions. It is possible to trigger these slabs in steep, unsupported terrain.
Use caution on open slopes and convex rolls Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 1.5 - 2.5