Archived

Avalanche Forecast

Apr 7th, 2017–Apr 8th, 2017

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

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

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: Little Yoho.

It is still possible to trigger larger avalanches in isolated areas, Careful and continues evaluation of the snowpack through the day is necessary.

Weather Forecast

The majority of the precipitation will tapper Friday night with temperatures expected to cool and freezing levels remaining below 1700m on Saturday. Unsettled weather will continue through the weekend with mostly cloudy skies and periods of precipitation but no significant accumulation.

Snowpack Summary

Over 10cm Friday above 2000m with little wind affect, expect some loading isolated to ridge crest. Rain at lower elevation saturated the snowpack but with cool temps forecasted we expect a good recovery. The deep persistent problem remains in the snowpack with much uncertainty encompassing it. avoidance of large slopes is still recommended.

Avalanche Summary

No new avalanches observed or reported today.

Confidence

Avalanche Problems

Cornices

April is cornice season, and we are getting regular reports of cornices failing. Mature cornices can propagate much further than you expect, so give them a wide margin when traveling on ridges and get up early and hurry if you must travel below them.

Avoid travel on slopes that are exposed to cornices overhead.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Persistent weak layers deep in the snowpack continue to cause uncertainty, despite the surface layers being remarkably strong. Continue to avoid exposure to large slopes. Patience is a virtue as we wait for a melt/freeze cycle to change anything.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 2 - 4

Loose Wet

Wet snow flows like water in gullies during warm spring days, and the next few days we expect wet snow avalanches to be common in gully areas below treeline. Ice climbers - avoid steep low elevation gullies.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2