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Archived

Avalanche Forecast

Apr 2nd, 2012–Apr 3rd, 2012
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Northwest Inland.

Confidence

Fair - Intensity of incoming weather is uncertain on Monday

Weather Forecast

Tuesday: light snowfall - moderate south winds - freezing level at 700m Wednesday: very light snowfall - light south winds - freezing levels at 1000m Thursday: Mix of sun and cloud as a clearing trend develops - light north winds - freezing level at 1000m

Avalanche Summary

No new avalanches to report. Expect an an increase in wind slab avalanche activity with forecast weather.

Snowpack Summary

Light amounts of recently fallen snow overlie a variety of old surfaces. These surfaces include crusts (found on all aspects below 1000m and on solar aspects higher up), and old windslabs. Below this the snowpack is mostly well settled and strong; however, the mid-February surface hoar (buried 80-120cm deep) may still react to large triggers in isolated terrain. Cornices in the area are reported to be very large and potentially unstable. On a side note, surface hoar growth has been noted in recent days and should be something to watch as new snow falls.

Avalanche Problems

Wind Slabs

Forecast strong winds and new snow will form fresh wind slabs. Watch for triggering in gullies, behind ridge crests and over rolls in terrain.

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 4

Cornices

Large cornices exist in alpine terrain. A failure could be destructive by itself, and could also trigger an avalanche on the slope below.

Aspects: North, North East, East, South East.

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 5