Avalanche Forecast
Regions: Bow Valley, Highwood Pass, Kananaskis, North 40, Spray - KLakes.
Spring is seemingly here to stay. Daytime highs and solar input is increasing the loose wet and wet slab likelihood, especially in late afternoon. When planning a trip, watch the timing of temperature swings and the quality of the overnight freeze. Don't underestimate the effect of warm temperatures and/or sun exposure.
Confidence
High
Avalanche Summary
Miner's Gully had a notable skier triggered sz2.5 wet slab today(Saturday). It was triggered late in the day and ran on the deep layers.
Snowpack Summary
The snowpack is steadily transitioning to a Spring snowpack.
On north aspects in the Alpine, dry snow can still be found, and weaknesses in the lower snowpack could still be triggered, as these areas have not completely morphed into a Spring snowpack. Otherwise all other aspects and elevations consist of multiple layers of crusts and/or a well settled snowpack. These crusts will break down through the day depending on air temperatures and solar radiation. There are still many areas with basal facets/depth hoar that could awaken if the snowpack gets warm enough.
Timing is everything. As surface crusts break down during the day the avalanche hazard will begin to increase. Start early and finish early.
Weather Summary
Sunday will be cloudy with light snow, or possibly rain at lower elevations. Temperatures will be cool off with overnight lows below zero and daytime high of +1.
Beyond that it looks like temperatures will stay chilly until early next week.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Even brief periods of direct sun could produce natural avalanches.
- Travel early on sun-exposed slopes before cornices weaken with daytime warming.
- Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.
- Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
Avalanche Problems
Loose Wet
The strong April sun and daytime heating will lead to loose wet avalanches, particularly in steep terrain.
Aspects: South East, South, South West, West.
Elevations: Alpine, Treeline.
Likelihood: Possible
Expected Size: 1 - 2
Persistent Slabs
Watch for sheltered northern areas where this layer may still exist. If triggered slabs could step down into the basal layers. Solar aspects could also see full depth releases during times of intense solar radiation and daytime heating.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Unlikely - Possible
Expected Size: 2 - 3.5