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Avalanche Forecast

Apr 14th, 2019–Apr 15th, 2019
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
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
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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: Jasper.

Weather Forecast

A trough strengthens offshore in the Aleutians on Monday morning. This will push cool and unsettled air over our region. Monday: A mix of sun and cloud with isolated flurries. Precipitation: Trace. Treeline temperature: Low -9 °C, High -4 °C.Ridge wind: light West. Freezing level: 1700 metres.

Snowpack Summary

Light snowfall and moderate SW wind building pockets of slab in the alpine. A supportive crust exists to 2,100m on all aspects and extends into the alpine on solar slopes. A winter snowpack remains on N alpine aspects, with a weak faceted layer down 20-50cm remaining a concern, and a facetted mid/lower snowpack that is weak in shallow areas.

Avalanche Summary

No new avalanche activity has been observed or reported.

Confidence

Avalanche Problems

Wind Slabs

Fresh snow and moderate winds have built fresh pockets of windslab in the alpine.
Use caution in lee areas. Recent wind loading has created wind slabs.Avoid steep lee and cross-loaded slopes

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Evidence from recent snowpack tests and whumphing would suggest that a weak layer of facets persists down 20-50cm in some areas, and may be becoming reactive with incremental loading from recent small snowfalls.
Carefully evaluate big terrain features by digging and testing on adjacent, safe slopes.Whumphing, shooting cracks and recent avalanches are all strong indicators of an unstable snowpack.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 2.5