Archived

Avalanche Forecast

Mar 3rd, 2018–Mar 4th, 2018

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

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: Glacier.

Moderate avalanche hazard means human-triggered avalanches are possible. Winds slabs and a buried sun crust require thoughtful decision making.

Weather Forecast

Today will be mostly cloudy with scattered flurries amounting to 5 cm. Convective flurries are possible which could significantly boost snowfall amounts. Ridgetop wind will be westerly 10-20kph and freezing level is forecast to 900m. That should be it for precip for the early part of the week atleast with mostly trace amounts forecast.

Snowpack Summary

We have 10cm of new snow which covers windslabs on all aspects above tree line. A crust/facet combo is down 30-50cm on solar aspects and has potential to be a good bed surface for avalanches. Rising freezing level & strong sun yesterday turned the surface snow moist on solar aspects and everywhere below 1400m. The January PWL's are buried 150-200cm

Avalanche Summary

Yesterday's strong solar input & rising freezing level triggered a natural avalanche cycle to size 2.5 mostly from steep solar slopes. The avalanches were loose & moist reaching into the middle of the run outs.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Avalanche Problems

Storm Slabs

Around 10 cm of new snow fell overnight with another 5-10 possible today. Expect this snow to be reactive at ridgetop or in steep unsupported terrain. This new slab buries an old windslab that was reactive on solar aspects.

Avoid convexities and unsupported features.Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

A suncrust and facet layer is buried down 40-70 cms on solar aspects. This layer has the potential to be human triggered with wide propagation.

Make observations and assess conditions continually as you travel.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5