We expect rising hazard throughout the day Thursday due to solar input. Start and end early before this occurs. Starting Friday, we will see 3000-3500m freezing levels and likely a large avalanche cycle.
Watch for new snow instabilites especially in places where convective weather cells have deposited more snow. Areas with new snow over a crust, recently wind loaded slopes, or places where the surface snow is becoming moist are the main concerns.
With rising daytime freezing levels, expect moist snow at lower elevations with the potential for wet loose avalanches to occur. Any sunny breaks will also contribute to this problem on steep solar aspects up into the alpine.
No new avalanches were observed or reported in Little Yoho Wednesday.
Thick crusts on all aspects weren't breaking down Wednesday over 2000m. In general, solar aspects are getting moist in the afternoon, creating new crusts daily, and multiple buried crusts are present. On northerly aspects, temperature crusts are present up to 2200 m, with 10-20 cm of preserved surface snow above this elevation. There are basal facets in some thin locations but they have been mainly dormant.
Around 5cm of snow Wednesday night with freezing levels near valley bottom.
Thursday: Clearing skies and 2500m freezing levels, NW winds 40km. Overnight Thursday freezing levels to valley bottom, but temperatures will be inverted at 2000m with warmer air above.
Friday: NW winds, mainly clear skies. Freezing levels will spike to 3000-3500m.
