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Archived

Avalanche Forecast

Apr 14th, 2013–Apr 15th, 2013
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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.

Weather Forecast

Cool, unstable airmass over the interior today will give light to locally moderate amounts of precipitation today into Monday. A weak ridge of high pressure builds on Tuesday with a mix of sun and cloud.

Snowpack Summary

10cm of new snow over 30 to 50cm of recent settling storm snow. April 10 crust is down 40 - 60cm.

Avalanche Summary

No new observations from yesterday.

Confidence

on Sunday

Avalanche Problems

Storm Slabs

Another 10cm overnight at tree line and above with reverse wind loading patterns. Storm snow instabilities and wind slab will exist at higher elevations before things have a chance to settle out.
Be cautious as you transition into wind affected terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3

Loose Dry

Loose snow sluffs can gain mass in steeper terrain catching a rider off guard today. Be mindful of terrain traps (e.g. gullies, cliffs) where small avalanches can be more serious.
Watch for terrain traps where small amounts of snow will acumulate into deep deposits.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Persistent Slabs

Infrequent large avalanches have occurred on deeper instabilities. Shallow, rocky areas where the snowpack is thin and weak are most likely where they will be triggered.
Be aware of thin areas that may propogate to deeper instabilites.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2 - 3