Avalanche Forecast
Issued: Apr 14th, 2013 10:10AM
The alpine rating is Cornices, Wind Slabs and Loose Wet.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Due to limited field observations
Weather Forecast
Monday: Expect a mix of sun and cloud, with alpine temperatures reaching -6 and freezing levels climbing to 1300m. Winds should be light to moderate from the northeast. Intense convective snowshowers are possible in the afternoon.Tuesday: Mixed skies again with alpine temperatures of -5 and freezing levels around 1400m. Winds remain light to moderate from the northeast.Wednesday: Expect clouds to build through the day with alpine temperatures reaching -4 and winds turning southwesterly.
Avalanche Summary
Both rider and remote triggered events have been reported in high (2400-2700m) north and northeast facing slopes up to size 2.0, all associated with preserved surface hoar.
Snowpack Summary
Convective snowshowers have given up to 45cm of new snow at higher elevations accompanied by light to locally moderate south/southwest winds creating new windslabs in lee locations at treeline and in the alpine. The interface of the new snow is predominantly crusts (sun, wind, meltfreeze) and the bonds are poor in some locations.The previous storm (Wednesday) was accompanied by moderate to strong south/southwest winds which left variable snow distribution in exposed areas near ridgetop with dense wind slabs in lee and cross-loaded features. These slabs are now buried, but may still be reactive to heavy triggers or in specific locations. Up to 75cm below the surface you will likely find a melt-freeze crust from previous sunny weather. At the same interface, spotty surface hoar is still being reported (up to 20mm!) in some high, north facing slopes. Where the surface hoar is present, consistent sudden results have been observed.Cornices are huge and have grown new tabs under the current conditions.
Problems
Cornices
Aspects: North, North East, East, South East.
Elevations: Alpine.
Likelihood
Expected Size
Wind Slabs
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Wet
Aspects: North, North East, East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 15th, 2013 2:00PM