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Archived

Avalanche Forecast

Apr 29th, 2013–Apr 30th, 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
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

Weather Forecast

Northwesterly flow will keep temperatures cool today into tomorrow with light to locally moderate amounts of precipitation. A ridge of high pressure will build Tuesday evening bringing clear skies and rising freezing levels to the interior on Wednesday.

Snowpack Summary

16cm of new snow overnight sits on moist and wet snow on all aspects and most elevations. Dry snow may still be found above 2500m on north aspects.

Avalanche Summary

Yesterday: numerous avalanches ranging in size from 2.0 to 2.5 in the highway corridor. On Mt Abbott, size 2.0 Na, east aspect at 2500m.

Confidence

on Monday

Avalanche Problems

Wind Slabs

Sustained south winds and new snow available for transport are creating wind slabs and loaded pockets of snow at higher elevations. 
Be cautious as you transition into wind affected terrain.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 3

Storm Slabs

Up to 20cm of storm snow has fallen overnight. This overlies moist, isothermal snow and crusts. Riders may trigger sluffs in steep terrain that can gain significant mass in heavy, moist snow.
Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Loose Wet

Expect loose avalanches in this new snow from "pin wheeling" or from solar triggering if the sun comes out today.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2