Avalanche Forecast
Issued: Dec 12th, 2011 8:52AM
The alpine rating is Wind Slabs, Loose Dry and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Intensity of incoming weather is uncertain
Weather Forecast
Tuesday: Isolated flurries, with clouds lifting late in the day. Winds will be westerly up to 40km/h and temperatures should reach -8. Wednesday & Thursday: A weak ridge rebuilds over the region giving mostly clear conditions with light westerly winds and temperatures reaching -5 in the afternoons.
Avalanche Summary
Some sluffing of the new snow (up to size 1.0) has been reported, predominantly at treeline and below.
Snowpack Summary
10-20cm of new snow has fallen in the past couple of days. This overlies surface hoar (as large as 10mm in protected areas), surface facets, the odd old windslab and sun crusts (on steep south through west aspects). The new snow has fallen with limited winds effect. All of these newly buried surfaces are good sliding interfaces; all that's lacking is a large enough load. As more snow arrives and/or the wind picks up (as per the forecast) the avalanche danger will increase. Due to the slow, incremental increase in load (dribs and drabs of new snow and sporadic winds), this increase in danger is difficult to pinpoint and could be very site specific.In some locations there is a rain crust buried between 20-35cm. This crust extends as high as 2200m. Some faceting has been observed around the crust; definitely worth remembering this one.The early November surface hoar remains a layer of concern. Buried 100-150cm it is unlikely to trigger, but consequences of triggering would be a large (up to size 3.0) destructive avalanche.
Problems
Wind Slabs
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Dry
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 13th, 2011 8:00AM