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Avalanche Forecast

Feb 28th, 2018–Mar 1st, 2018
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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.

A significant shot of snow and wind Wednesday night will likely initiate natural avalanche activity that may persist into Thursday. Stick to simple well supported terrain free of overhead hazard, and be sure to avoid terrain traps like gulleys.

Confidence

Low - Timing, track, or intensity of incoming weather system is uncertain on Thursday

Weather Forecast

After much uncertainty, the models have converged on a solution where the South Coast receives the brunt of the storm while the rest of the province gets more of a glancing blow. The region should pick up a significant shot of snow and wind Wednesday night before we move into a high and dry period on Thursday that is expected to last for the foreseeable future. WEDNESDAY NIGHT: Freezing level around 600 m, 25 to 35 cm of snow, strong south/southwest wind. THURSDAY: Scattered cloud cover, freezing level rising to around 700 m, moderate south/southeast wind, 1 to 5 cm of snow possible. FRIDAY: Clear skies in the morning, cloud building throughout the day, freezing level around 750 m, light variable wind, no precipitation expected.SATURDAY: A few clouds, freezing level rising to around 1200 m, light variable wind, no precipitation expected.

Avalanche Summary

No new activity to report from Wednesday, but we suspect that a small natural storm slab avalanche cycle occurred. On Tuesday storm slab avalanches up to 15 cm in depth were very touchy and sensitive to ski cutting, check out these two MIN reports here and here.

Snowpack Summary

The region picked up 15 cm of snow during the day Wednesday with moderate winds out of the east/southeast. This adds to the 20 cm that fell Tuesday. 40 to 55 cm of storm snow fell over the weekend accompanied by strong southerly winds. All of this snow rests on previously wind-affected surfaces and a sun crust on southerly aspects.A hard rain crust that extends into alpine terrain is buried about 60 to 120 cm deep. There are no substantial weak layers below the crust.Cornices have formed on many alpine ridgelines. They will become touchier as they grow in size, as temperatures rise, and as they are subject to the strong mid-winter sun on clear days.

Avalanche Problems

Storm Slabs

25 to 35 cm of snow and strong southerly wind will likely initiate a natural avalanche cycle Wednesday night that may persist into Thursday. The setup is prime for human triggered avalanches, take a conservative approach to the mountains Thursday. 
Stick to simple terrain and be aware of what is above you at all times.Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.Avoid exposure to overhead avalanche terrain, avalanches may run surprisingly far.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2.5