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Archived

Avalanche Forecast

Feb 4th, 2017–Feb 5th, 2017
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
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Watch for an increasing avalanche danger as the day progresses.  Watch for signs of instability in the storm snow.

Weather Forecast

10cm overnight and another 15cm expected in the next 24hrs. Ridge top winds were strong overnight and are forecast to moderate today then pick up again tonight shifting from SE today to SW tonight. Alpine temperatures should remain cool in the -10C to -13C range.

Snowpack Summary

10cm of storm snow overnight and another 15cm expected by Sunday morning. Moderate to strong winds from the NW overnight redistributed the snow onto alpine and treeline lee features. The new snow has buried a variety of old snow surfaces ranging from widespread windslab, to sun crust on steep solar aspects and surface hoar on sheltered open slopes.

Avalanche Summary

No new avalanche activity observed in the last 24hrs. However after last night's wind and continued snowfall we expect to see natural activity initiating out of extreme terrain today. Skiers and riders should expect sensitive storm slabs especially as they venture into more wind exposed terrain.

Confidence

Forecast snowfall amounts are uncertain

Avalanche Problems

Storm Slabs

Storm slabs are forming over a weak old snow surface that developed during the recent cold clear weather. Freshly formed slabs will be more sensitive to human triggering in wind exposed terrain.
The new snow will require several days to settle and stabilize.Watch for whumpfing, hollow sounds, and shooting cracks.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 3