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Avalanche Forecast

Apr 15th, 2014–Apr 16th, 2014
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
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: Sea To Sky.

This bulletin has been produced using very limited field data. If you've been out in the mountains we'd love to hear about what you've seen. Observations can be sent to forecaster@avalanche.ca

Confidence

Fair - Due to the number of field observations

Weather Forecast

Wednesday: Cloudy with flurries and isolated sunny breaks. The freezing level is around 1500 m and ridge winds are light to moderate from the south. Thursday: Cloudy with flurries or periods of snow – 15-30 cm. The freezing level is around 1200-1400 m. Winds are moderate from the S-SE.  Friday: Cloudy with sunny breaks and a chance of flurries. The freezing level is around 1500 m and ridge winds are light.

Avalanche Summary

Some loose wet activity was reported from steep sun exposed slopes on Monday. Over the past few days several cornice collapses were reported including a size 3 release on Forger Peak in Garibaldi Park. In the Rutherford area a few size 2.5 cornice releases triggered slab avalanches in steep terrain to size 2.

Snowpack Summary

A melt-freeze crust exists on all aspects up to 2000 m and to mountain top on previously sun-exposed slopes. Dryer snow can be found on high northerly aspects. The recent warmer temperatures have helped to strengthen and settle the upper snowpack. Large sagging cornices are looming over slopes and pose a threat, especially when the sun comes out.The deep and destructive early February facet/crust layer is now close to 200 cm below the surface. This layer is largely dormant at this time; however, it should remain on your radar, especially when freezing levels are high and the sun is shining.

Avalanche Problems

Cornices

Several large natural cornice failures were observed over the weekend. Although less likely with the cooling trend, cornice fall has the potential to be highly destructive.
Give cornices a wide berth when travelling on or below ridges.>

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 4