Archived

Avalanche Forecast

Feb 17th, 2013–Feb 18th, 2013

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: South Rockies.

Danger may be slightly higher in the southeast part of the region, where more snow fell during the recent storm.

Confidence

Fair - Due to variable snowpack conditions

Weather Forecast

Synopsis: Relatively benign weather is anticipated through the forecast period.Monday: Dry with some sunshine. Winds light southwesterly. Treeline temperatures around -8C in the morning warming to -3 in the afternoon.Tuesday: Dry. Cloudy. Calm. Freezing level around 1000 m in the afternoon.Wednesday: Flurries. Light winds. Freezing level around 1000 m in the afternoon.

Avalanche Summary

No new avalanches have been reported recently.

Snowpack Summary

Eastern areas saw 10-15cm new snow in the last storm, while western area just a trace. This new snow overlies old wind slabs on higher north and east facing terrain and sun crusts on solar aspects. Wind slabs are extensive in exposed areas and cornices are reported to be well developed. A surface hoar/facet/sun crust layer from mid February (12th) may be buried in the top 20 cm or so, where it hasn't been blown away by the wind and is likely making some of the wind slabs more touchy. Mid and lower snowpack layers are generally well settled and stable.

Avalanche Problems

Wind Slabs

Fresh wind slabs overly recent weak surfaces in exposed lee areas.

Avoid freshly wind loaded features.>Watch for whumpfing, hollow sounds, shooting cracks or recent avalanches.>Use ridges or ribs to avoid pockets of wind loaded snow.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 4