Avalanche Forecast
Issued: Jan 2nd, 2017 4:09PM
The alpine rating is Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
High - The weather pattern is stable
Weather Forecast
TUESDAY: Dry and sunny. Wind northeasterly 35 km/h. Temperatures around -14C.WEDNESDAY: A mix of sun and cloud. Wind northeasterly 15-35 km/h. Temperatures around -5C.THURSDAY: A mix of sun and cloud. Wind light west. Temperature around -4C.
Avalanche Summary
Small wind slab avalanches could be triggered in recently loaded pockets to size 1.
Snowpack Summary
The critical part of snowpack analysis under current conditions is figuring out how the wind is redistributing snow into wind slabs. Extreme northerly winds have been reported, which will be "reverse loading" wind onto slopes that were previously scoured. I suspect the cold will temper the reactivity of wind slabs on moderate slopes; however, on steep, aggressive terrain, particularly on south-facing slopes in the sun, wind slabs will definitely be in play. Between Monday and Friday last week, 70-100 cm of storm snow accumulated in the region. Below the new snow from this week lies the Boxing Day interface which consisted of wind affected surfaces, faceted (sugary) snow, or surface hoar. Recent observations suggest the overlying snow is generally well bonded to this interface. The mid-December interface is now down 100-150 cm and is generally considered to be stable in this region. Snowpack layers below this are well bonded.
Problems
Wind Slabs
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 3rd, 2017 2:00PM