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Archived

Avalanche Forecast

Apr 17th, 2018–Apr 18th, 2018
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
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: Glacier.

An underwhelming storm will tapper off this morning.Avalanche hazard will increase with daytime warming, especially if the sun has a chance to make an appearance on solar aspects.

Weather Forecast

A delightfully typical Selkirk spring day with mainly cloudy skies, periods of sun and convective flurries. Expect an alpine high of -7 with valley bottoms rising above zero as the freezing level reaches 1500m. Winds will be from the west in the 25-50km/hr range. Clearing skies for Wednesday and Thursday.

Snowpack Summary

10cm of new snow in the past 24hrs brings the weekly storm snow amount to 55cm. The storm snow is moist and sits on a crust up to 1900m on all aspects and seems to be bonding well. The mid and lower pack is well settled and strong.

Avalanche Summary

Numerous loose wet avalanches yesterday size 2-2.5 occurring below 2100m, along with a size 3 glide crack, which stopped ~100m from the highway.Several glide cracks are opening up in our area and are unpredictable in nature. Avoid these hazards as the results will be large and destructive.Avalanche Control today, check DriveBC for more information

Confidence

Avalanche Problems

Loose Wet

Loose wet slides can be expected as daytime warming and solar radiation pushes freezing levels upwards of 1500m . Expect surface snow layers to be moist and reactive on convexities and unsupported features below treeline this afternoon.
Daytime warming will weaken surface layers.Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

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

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5

Storm Slabs

Over 40cm in last 72hrs accompanied by mod to strong winds has created storm slabs on all aspects at and above treeline . Wind effect may have hardened the slab on alpine lee slopes. Today's snow may mask this problem.
Use caution in lee areas in the alpine and treeline. Storm snow is forming slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3