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Archived

Avalanche Forecast

Feb 5th, 2013–Feb 6th, 2013
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Weather Forecast

Westerly flow, light to moderate amounts expected today and moderate amounts into Wednesday with associated moderate to strong south west winds.

Snowpack Summary

10 to 20cm over the Feb 3 sun crust on steep solar aspect. Temperature crust down ~20cm below 1400m. Profile on Mt Fidelity, 2080m, SE aspect, 33deg. 227cm snow depth. Easy to moderate resistant planar test results down 12 and 20 and moderate to hard sudden planar results down 45 and 57cm. Wind effect in upper snowpack tree line and above.

Avalanche Summary

Yesterday there were 2  natural, size 2.0, slab avalanches east of the Rogers Pass summit and 1 natural , size 2.5 avalanche west of the summit.

Confidence

Intensity of incoming weather systems is uncertain on Wednesday

Avalanche Problems

Wind Slabs

Reports of wind slab, 20 to 45cm deep, reactive to rider testing yesterday from sustained moderate to strong south winds for the past 3 days. Caution on lee and cross loaded slopes.
Avoid freshly wind loaded features.Be cautious as you transition into wind affected terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2