Summary
Confidence
Fair - Timing, track, or intensity of incoming weather is uncertain on Thursday
Weather Forecast
Thursday: Moderate precipitation continuing overnight / moderate westerly winds / freezing level at 1600m Friday: Light precipitation with locally moderate accumulations continuing overnight / moderate westerly winds / freezing level at 1700m Saturday: generally clear skies / light and variable winds / freezing level at 1900m
Avalanche Summary
On Sunday, a very large (size 3) naturally-triggered avalanche was reported on an east aspect at 2700 m that initiated on the late March crust and then stepped down to glacier ice. More recently, there have been numerous loose snow avalanches running on steep solar aspects to size 2.5. With forecast weather, I expect a shift from wet snow avalanches to storm snow instabilities at higher elevations, while wet snow instabilities will still exist below treeline.
Snowpack Summary
Melt-freeze conditions exist to about 2100m on all aspects and to ridge top on solar aspects. On shaded aspects higher up, 60 cm of recent storm snow is reported to be generally settling well with recent warm temperatures and generally light winds. However, shears may still exist within the storm snow. Additionally, a crust that formed near the end of March is a concern, particularly on steep, solar aspects. With prolonged warming, there is the possibility for wet slabs to release on this layer, or potentially on deeper layers (including the ground), as melt water starts to percolate through the snowpack. Cornices are large in some areas and drooping with recent warm temperatures.
jlammers,
Avalanche Canada
