Avalanche Forecast
Issued: Mar 9th, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
aaron beardmore,
Parks Canada
A forecasted wind event is expected on Tuesday creating fresh wind slabs. Additionally, up to 20cm is expected in Little Yoho by Wednesday morning.
Summary
Weather Forecast
The high pressure system will start to close out on Tuesday. As this happens wind will increase significantly from the SW in to the strong to extreme range. Snow will start Tuesday afternoon and by Wednesday morning expect up to 20cm. Temperatures will stay in the range of -5 in the valley and -15 at the ridge.
Snowpack Summary
In the alpine the wind is starting to produce soft slabs in lee areas. New sun crusts exist on steep solar aspects. 40-50 cm of recent snow sits over the Feb 29 crust interface on steep solar aspects. In thin snow pack areas a dense mid-pack sits over a weak, faceted base, while thick areas have a stronger base.
Avalanche Summary
Avalanche control on Mt Dennis produced results to size 3 (large cornices that entrain facets and new snow). Evidence of avalanches up to size 3 from the cycle from the past few days in the Little Yoho region.
Confidence
Problems
Wind Slabs
This problem has transitioned from a storm slab. The wind is expected to pick up significantly on Tuesday, creating new wind slabs. Storm slabs may slabs may linger in locations that dont see the wind.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 10th, 2020 4:00PM
