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Archived

Avalanche Forecast

Apr 22nd, 2016–Apr 23rd, 2016
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Jasper.

Heavy wet snow expected through the weekend that will fall on a weak isothermal  snowpack.  Expect poor tree-line travel.

Weather Forecast

Rain turning to snow overnight with 10 cm possible.  The freezing level will fall on Saturday and will hover around 2200m through the weekend.  Seasonal temperatures with showers expected through the weekend.

Snowpack Summary

Rain changing to snow overnight adding ~10 cm of heavy wet snow. Isothermal conditions exist well into the alpine due to prolonged +3500m freezing level. Expecting a weak overnight recovery above 2500m on Friday night. The persistent slab problem still exists on north facing alpine slopes.

Avalanche Summary

No recent observations however expecting continued loose wet and wet slab avalanches especially with forecasted rain and wet snow through the weekend.

Confidence

Avalanche Problems

Deep Persistent Slabs

This problem primarily remains on alpine slopes as much of the lower snowpack has either melted or is now isothermal.
Travel early on frozen crusts before the heat of the day.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 3 - 4

Loose Wet

Rain and heavy snow overnight on Friday will continue the loose wet avalanche cycle.
Use extra caution on slopes if the snow is moist or wet.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3

Cornices

All cornices should be suspect for failure with continuing warm temperatures and rain on Friday.
Extra caution needed around cornices with current conditions.

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

Elevations: Alpine.

Likelihood: Likely

Expected Size: 1 - 2