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Archived

Avalanche Forecast

Apr 11th, 2021–Apr 12th, 2021
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
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
3: Considerable
The avalanche danger rating at treeline will be considerable
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: Glacier.

Its still winter in the mountains. Remember to keep that mindset when leaving town in flip flops with a bbq planned for the afternoon

Weather Forecast

A ridge of high pressure is on the way. Light flurries are still possible Sunday.

Sunday:  Sun + cloud, trace snow, high -7, wind light, freezing level 1400m

Monday: Sun + cloud, trace snow, high -5, wind light gusting to E 35, freezing level 1500m

Tuesday: Sunny, nil precipitation, high -3, wind light gusting to E 30, freezing level 1800m

Snowpack Summary

30cm of new snow in 48hrs with strong S winds fell on top of the April 7th sun crusts, wind pressed surfaces and melt freeze crusts at low elevations. The March 18 crust is down 90cm. A very strong dense mid and lower pack sits on up to 50cm of decomposed crusts and large facetted crystals near the ground

Avalanche Summary

Several sz 1 ski cuts and natural avalanches have been reactive on small features on all aspects this week. A sz 2.5 natural was observed from MacDonald Gully 5 on Friday and a new cornice release sz 2.0 was seen this morning from Grizzly path. Glide slabs are still releasing unpredictably, a sz 3 and a sz 4 this week on the S side of Mt Tupper.

Confidence

on Sunday

Avalanche Problems

Storm Slabs

30cm of recent snow has settled and drifted into a reactive slab on all aspects, up to 50cm deep in places. Solar input today may be enough to trigger this naturally in steep solar features where it sits over a crust

  • Use caution in lee areas in the alpine and treeline. Storm snow is forming touchy slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5

Cornices

Natural cornice failures continue. Avoid exposure to cornices while approaching ridge tops and on ascents from below

  • Extra caution needed around cornices with current conditions.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1.5 - 3