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Avalanche Forecast

Feb 19th, 2017–Feb 20th, 2017
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
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
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
1: Low
The avalanche danger rating below treeline will be low

Regions: South Coast.

Heavy snowfall Sunday overnight is expected to form touchy new storm slabs. Stick to mellow terrain and avoid wind loaded features.

Confidence

Moderate - Intensity of incoming weather systems is uncertain on Monday

Weather Forecast

The next low pressure system arrives on the south coast on Sunday evening. 30-40 cm of new snow is expected Sunday overnight with another 5-10 cm during day on Monday. Alpine wind is forecast to be moderate from the south and southwest. Freezing levels are forecast to be around 800 m overnight and reach around 1100 m in the afternoon. A mix of sun and cloud is currently expected on both Tuesday and Wednesday with the possibility of lingering flurries on Tuesday. Alpine wind is forecast to be light to moderate on Tuesday and light on Wednesday. Afternoon freezing levels are forecast to peak around 800 m on both days.

Avalanche Summary

No new avalanches have been reported recently. Widespread natural avalanche and cornice activity occurred last week during the warm storm system. Heavy snow and moderate winds Sunday overnight and early Monday are expected to form storm slabs. These slabs are expected to be touchy in wind loaded terrain and steep slopes where the new snow sits on the hard crust layer.

Snowpack Summary

In the alpine, up to 25 cm of recent snow overlies the widespread mid-February rain crust. Reports suggest this snow is well bonded to the crust. At lower elevations, the crust is likely on or near the surface of the snowpack and is expected to be supportive to the weight of a skier. Below the crust, the snowpack is likely moist or wet as a result of the heavy rain from last week.

Avalanche Problems

Storm Slabs

New storm slabs are expected to form on Monday as a result of heavy snowfall Sunday overnight. These slabs are expected to be touchy in wind loaded terrain and on steep slopes where they overlie the hard melt-freeze crust.
Avoid areas where the surface snow feels stiff or slabby.Avoid freshly wind loaded features.Use conservative route selection, choose moderate angled and supported terrain with low consequence.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2