Avalanche Forecast
Issued: Jan 27th, 2019 3:00PM
The alpine rating is Deep Persistent Slabs and Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Moderate - Wind effect is extremely variable
Weather Forecast
Temps will fall overnight to the -15 to -20. No snow is forecast, but as I say that I look out the window and see it snowing...flurries might give a few centimeters of new snow. The winds will continue to be from the NW, but they will slow down to the moderate range.
Avalanche Summary
We had reports of an avalanche on Snowpeak yesterday, but details are few right now. All we know for sure was it was in a shallow, alpine snowpack. There was also a fresh but distant avalanche noted today in the high alpine towards Mt Assiniboine. Likely a cornice trigger maybe a 2.5, east aspect.
Snowpack Summary
Quite a few changes last night. Firstly, the wind once again picked up and created new slabs in the alpine. Judging from how things look, these slabs are isolated in nature and mostly in immediate lee areas. Treeline was spared the full brunt of the wind so there is a bit of new snow overlying the older windslabs. Having said that, there may be slabs in wind exposed areas. Secondly, there is a hint of sun crust on solar aspects. In Alpine and treeline areas the mid pack is generally well settled with a minor shear (failure) noted on the Jan 17 layer. I say minor because the snow above isn't a slab yet and the layer is shallow. The deeper weak layers are just...deep & weak. From what we can gather, in deeper snowpack areas the bridging effect of the midpack keeps the house of cards from collapsing. In shallow areas, all bets are off. That layer is delicate and if it fails, expect a large avalanche!
Problems
Deep Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Wind Slabs
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 28th, 2019 2:00PM