Archived

Avalanche Forecast

Apr 8th, 2017–Apr 9th, 2017

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

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: Northwest Inland.

Cornices remain the primary concern. Solar radiation is a common cornice trigger. Limit your exposure when it's cloudy and completely avoid cornices when it's sunny.

Confidence

High -

Weather Forecast

SUNDAY: Mix of sun and cloud isolated flurries. Light southerly ridgetop winds. Freezing level around 1500 m.MONDAY: Mostly sunny. Light easterly ridgetop winds. Freezing level around 1600 m.TUESDAY: Mix of sun and cloud with isolated flurries. Light southeasterly ridgetop winds. Freezing level around 1600 m.

Avalanche Summary

No new avalanches were reported on Friday in this region.

Snowpack Summary

5-10 cm of new snow on Saturday with light southerly winds may have created small wind slabs on lee features below alpine ridgetops. The new snow will likely be sitting on hard surfaces created by strong winds earlier in the week. Elevations below roughly 1300 m are experiencing a daily melt-freeze cycle and the snowpack is likely isothermal. The February crust and facet layer is 70-90 cm deep in the Houston Telkwas sled area and a deep persistent faceted weak layer is still lingering near the bottom of the snowpack in all areas.

Avalanche Problems

Cornices

Solar radiation is a common cornice trigger. Limit your exposure when it's cloudy and completely avoid cornices when it's sunny.

Minimize exposure to overhead hazard from cornices.Give cornices a wide berth when travelling on or below ridges.Cornices become weak with daytime heating, so travel early on exposed slopes.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3

Wind Slabs

New snow and wind on Saturday may create small wind slabs in lee features below alpine ridgetops.

Avoid freshly wind loaded features.Approach steep lee and cross-loaded slopes with caution.Use ridges or ribs to avoid pockets of wind loaded snow.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2