Likelihood of triggering the Dec 15th layer at treeline is higher in Little Yoho. Make conservative terrain choices and avoid open uniform slopes at treeline.
Summary
Weather Forecast
The temperature inversion will continue until Tuesday morning. Expect alpine temperatures to remain near 0 degrees. A cooling trend is expected thereafter. Cloud cover and the start of light precip will begin late on Tuesday. Accumulations of up to 10cm are expected by the end of Thursday. Wind will pick up to moderate from the SW throughout Tues.
Snowpack Summary
Continued warm alpine temperatures and clear skies moistening the upper snowpack on steep S-W aspects. 30-50cm over the Dec.15 persistent weak layer of facets and surface hoar. This Dec 15th layer is reactive to skiers at treeline and above and producing easy to moderate snowpack test results. Below this is a heavily faceted snowpack.
Avalanche Summary
Avalanche control produced results up to size 2.5 today on Hwy 93S and the Sunshine Road. The larger avalanches were produced on uniform terrain features at treeline where the Dec 15th surface hoar was present. No reports today from Little Yoho, but concern remains.
Confidence