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Archived

Avalanche Forecast

Mar 20th, 2016–Mar 21st, 2016
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
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

Regions: Little Yoho.

Although conditions appear to be improving, forecasters still have low confidence in the snowpack due to large avalanches as recent as Friday. Think critically about your terrain choices.

Weather Forecast

Freezing levels are expected to hover at 1900m on Monday. Light precipitation is also expected (~7cm). Wind will be light to moderate from the W-SW.

Snowpack Summary

Solar crusts on 40-60cm of snow overlies a well settled mid and lower pack. Observations are limited but we suspect there are buried sun crusts on steep E through W aspects with 60-100cm above (similar to Banff region). Isolated thin snowpack areas have weaker facet layers, but this is not a widespread snowpack characteristic of the region.

Avalanche Summary

No new avalanches observed or reported today.

Confidence

Avalanche Problems

Loose Wet

With 1750m freezing levels there is a chance that loose wet avalanches will occur below treeline on Monday.

  • Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Now that the sun is higher in the sky, buried crusts becomes more of a problem. Presently there are several crusts buried on S through E and W aspects, with 50-100 cm overlying them. We do not have many observations of this currently.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3

Cornices

There are large cornices at this point in the season. With warming expected, do not expose yourself to this hazard or the avalanches they may trigger.

  • Cornices become weak with daytime heating, so travel early on exposed slopes.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 3