Avalanche Forecast
Regions: Waterton Lakes.
Weather Forecast
A little more snowfall for Sunday night, with cooling temperatures - models disagree as to just how much, but upto 10cm. Monday-Wednesday, expect winter-like temperatures, and unsettled weather: a mix of sun & cloud, with the odd flurry. Strong Westerly winds on Monday gradually ease to Light Westerlies by Wednesday.
Snowpack Summary
25-40cm of snow has fallen since Thursday, accompanied by strong SW winds and warm temperatures . This has created dense Storm Slabs on lee slopes, bonding poorly to a crust below. A deeper crust down 60-100cm has produced alarming results in some snowpack tests at Treeline, although slope tests did not produce avalanches on this layer.
Avalanche Summary
On Saturday and Sunday, several small Storm Slab avalanches were observed in lee terrain. These started in steep terrain, or under headwalls. Two very large avalanches were observed recently near the divide. These began in steep, unsupported terrain. The dates of these are unknown, but warm storms on March 6 or March 10 were likely responsible.
Confidence
Forecast snowfall amounts are uncertain on Sunday
Avalanche Problems
Storm Slabs
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood: Possible - Likely
Expected Size: 1 - 2
Cornices
Aspects: North, North East, East.
Elevations: Alpine, Treeline.
Likelihood: Unlikely - Possible
Expected Size: 1 - 2