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Avalanche Forecast

Apr 13th, 2017–Apr 14th, 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
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
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

Regions: Sea To Sky.

Carefully evaluate steep slopes - this is where you'll trigger an avalanche after the storm, particularly in wind-affected terrain.

Confidence

Moderate - Timing or intensity of solar radiation is uncertain on Sunday

Weather Forecast

Friday: Flurries. Freezing level around 1500 m. Winds 10-20 km/h from the southwest. Saturday: Flurries, clearing in the afternoon. Freezing level around 1500 m. Winds mostly calm. Sunday: Dry, with sunshine, especially in the morning. Freezing level rising to 1900 m. Light winds.

Avalanche Summary

Natural and skier-triggered avalanches up to size 2.5 were reported during the storm on northerly aspects above 1800 m.

Snowpack Summary

15-25 cm of new snow with moderate to strong winds from a variety of directions have created fresh wind slabs in exposed terrain at treeline and above. Numerous crusts exist in the upper snowpack, especially on solar aspects. Cornices are large and remain a concern: Saturday's fatal accident near Lions Bay illustrates the danger of them breaking off, and the large avalanches they can trigger. Expect small loose dry avalanches in steep terrain where the new snow is sitting on a crust.

Avalanche Problems

Wind Slabs

Shifting wind directions have created fresh wind slabs on a variety of aspects.
Be cautious as you transition into wind affected terrain.Use ridges or ribs to avoid pockets of wind loaded snow.The new snow will require several days to settle and stabilize.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Cornices

Where they exist, cornices pose a significant hazard and should be avoided.
Falling cornices can trigger large avalanches.Give cornices a wide berth when travelling on or below ridges.Extra caution needed around cornices with current conditions.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3