Avalanche Forecast
Issued: Feb 16th, 2018 5:38PM
The alpine rating is Storm Slabs and Cornices.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Moderate - Forecast snowfall amounts are uncertain
Weather Forecast
SATURDAY: Moderate snowfall with 15-20 cm throughout the day in the north and 30-40 cm in the south, moderate southwest wind, alpine high temperatures around -8 C in the north and -2 C in the south.SUNDAY: Clearing and cooling with moderate northeast wind and alpine high temperatures around -18 C in the north and -10 in the south.MONDAY: Mostly sunny with light northeast wind and alpine high temperatures around -14 C.
Avalanche Summary
No notable avalanches were reported on Thursday or Friday.Reports from earlier in the week indicate wind slabs were reactive in the northern part of the region, including some small (size 1) skier triggered slabs and some larger (size 2-3) naturally triggered slabs on a range of aspects in alpine terrain (some of which were triggered by cornices).
Snowpack Summary
Southern parts of the region are expecting heavy snowfall on Saturday and forming fresh storm slabs as snow accumulates. Northern parts of the region are getting lighter amounts, so fresh slab development will primarily occur in wind-affected terrain.A few interfaces buried below the most recent snow could potentially support wide propagations in the fresh storm/wind slabs. These include scoured crusty surfaces on south-facing alpine slopes, a melt-freeze crust up to about 1900 m, and old wind slabs on a range of aspects at high elevations. The mid-January crust is now buried beneath 80-150 cm of settled snow and may remain sensitive to large triggers - especially in thinner snowpack areas in the north part of the region. Large, looming cornices exist, they are fragile, and they demand respect. Cornice falls are very effective triggers for avalanches on the slopes below them.
Problems
Storm Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Cornices
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 17th, 2018 2:00PM