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Archived

Avalanche Forecast

Apr 19th, 2022–Apr 20th, 2022
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
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

Regions: South Coast.

40-60 cm of recent snow and moderate southerly winds have formed large storm slabs that are likely to remain reactive to human triggers; especially in wind affected terrain.

 Avoid exposure to overhead avalanche terrain as temperatures increase. 

Confidence

Moderate - Uncertainty is due to the limited number of field observations.

Weather Forecast

Tuesday night: Clear / Light south wind / Low of -3 / Freezing level 900 m.

Wednesday: Sunny, with increasing cloudiness in afternoon. / Moderate southeast wind / High of 9 / Freezing level 1500 m.

Thursday: Mix of sun and cloud / Light south wind / High of 8 / Freezing level 1400 m.

Friday: Mix of sun and cloud / Light northwest wind / High of 9 / Freezing level 1600 m.

Avalanche Summary

We currently have very limited avalanche observation data from this region.

Human triggered storm slab avalanches remain likely at upper elevations; especially in wind affected terrain.

Please consider posting your observations to the Mountain Information Network (MIN). Photos of current conditions and avalanches are the most helpful. 

Snowpack Summary

40-60 cm of recent snow and moderate southerly winds have formed large storm slabs that are likely to remain reactive to human triggers at all elevations. Expect the storm slabs to be most reactive on lee features at treeline and above.

The recent snow is sitting on a variety of hard snow surfaces, including crusts and wind scoured snow. Below this, there are several crusts in the upper snowpack, but they are unlikely to be a concern in most areas until the next significant warming event.

Terrain and Travel

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be especially cautious as you transition into wind affected terrain.
  • Use small low consequence slopes to test the bond of the new snow.
  • Avoid exposure to overhead avalanche terrain as temperatures increase.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

Avalanche Problems

Storm Slabs

40-60 cm of recent snow and moderate southerly winds have formed large storm slabs that are likely to remain reactive to human triggers; especially in wind affected terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5

Loose Wet

Expect a wet loose natural avalanche cycle to occur when the sun comes out.

Stay well away from any large slopes or avalanche paths that are in the sunshine.

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

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2