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Archived

Avalanche Forecast

Apr 12th, 2019–Apr 13th, 2019
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: Glacier.

Watch for strong solar input this morning bringing on an early afternoon breakdown of surface crusts on solar aspects.

Weather Forecast

A mix of sun and cloud today with alpine high of -1C and freezing level forecast to top out at 2000m. W wind up to moderate later today. Saturday/Sunday a Pacific system will bring gusty SW through W winds along with up to 20cm snow over the two days.

Snowpack Summary

In the alpine, Isolated persistent slabs overlie surface hoar on shaded aspects, and melt-freeze crusts on solar aspects; beneath is a well settled mid and lower snowpack. A melt freeze crust is capping isothermal snow on all aspects to tree line; surface crusts exist at higher elevations on solar aspects.

Avalanche Summary

Avalanche control yesterday produced a few slides up to size 2. No new avalanches reported in the backcountry.

Confidence

Avalanche Problems

Loose Wet

A melt-freeze crust is capping weak isothermal snow in thin snowpack areas BTL. These crusts are prevalent at tree-line and above on solar aspects. Crusts have been breaking down by mid afternoon from the heat of the day.
Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

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

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

20cm of recent snow and moderate Southerly winds have created wind slabs on specific terrain features in the alpine. These slabs overlie a melt-freeze crust on solar asp and or, surface hoar on polar asp.
Use caution in lee areas. Recent wind loading have created wind slabs.Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2