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Archived

Avalanche Forecast

May 1st, 2017–May 2nd, 2017
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Little Yoho.

This is the last scheduled bulletin for Little Yoho region. Refer to the Banff, Yoho & Kootenay bulletin for current conditions.

Weather Forecast

Spring weather. Some resources for weather forecasts are Avalanche Canada, and Spot Wx.

Snowpack Summary

A spring snowpack exists with multiple melt freeze crusts on solar aspects. Dry snow may be found only on the highest north aspects. A basal weakness remains at the bottom of the snow pack. It is currently only reactive to large triggers like cornices but may wake up with solar warming.

Avalanche Summary

Check the Banff, Yoho & Kootenay National Parks bulletin for recent avalanche observations.

Confidence

Avalanche Problems

Loose Wet

Loose wet avalanches can be expected on solar aspects in the afternoon when the day warms up.

  • Pay attention to sluffing off cliffs and steep solar terrain, signs of a warming snowpack.
  • If triggered the loose wet sluffs may step down to deeper layers resulting in large avalanches.

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

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

The weak basal facets can produce large avalanches with large triggers or heat. Remember that the snowpack is generally strongest in the morning when it is cool.

  • Pay attention to overhead hazards like cornices which could easily trigger the deep persistent slab.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 2 - 4

Cornices

Cornices are large and will fall off at some point this spring. These large triggers have been enough to trigger the deep persistent layer. Be especially careful of these on warm afternoons.

  • Pay attention to overhead hazards like cornices which could trigger the deep persistent slab.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3