Avalanche Forecast
Issued: Nov 5th, 2020 8:05AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs and Loose Wet.
ross campbell,
With the current weather and avalanche conditions, it is not a good day for skiing or riding @ Rogers Pass. Avalanche conditions will improve; however, travel will remain rugged when the rain soaked snow freezes!
Summary
Weather Forecast
A cold front is currently passing over Rogers Pass, Winds are extreme, Freezing levels are above ridge top (hoping they start to fall), and it is still raining!
Today: 4cm of new snow, winds gusting to over 100km/ph, and FL dropping to 1800m
Tonight: Fl dropping to Valley bottom, no precipitation, with a general clearing trend.
Snowpack Summary
Alpine: Height of snow is above average where the wind hasn't scoured it back to bare rock. Storm slabs continue to build
Treeline: The snowpack is shrinking with rain on snow conditions. Expect rain soaked snow, and isothermal conditions at this elevation.
Below Treeline: The height of snow varies from 30cm at HWY elevation, to 70cm.
Avalanche Summary
We are in the midst of a decent natural avalanche cycle, with winds reaching over 160km/h, above freezing temperatures to ridge top, and another 20mm of rain last night. We've observed a dozen new avalanches this morning in the Highway Corridor up to size 3, and are expecting the natural avalanche cycle to taper off as temps cool.
Confidence
Problems
Storm Slabs
Extreme winds/Intense loading, above average temperatures and ~50mm of precipitation <48 hours has built widespread storm slabs in the Alpine. Natural Avalanche activity is occurring presently, but will taper off today as temperatures drop.
- Avoid avalanche terrain today.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Wet
Rain continues to soak an already isothermal snowpack. Expect loose wet avalanches in steep terrain features.
- Avoid terrain traps, such as gullies, where the consequences of a small avalanche could be serious.
Aspects: All aspects.
Elevations: Treeline, Below Treeline.
Likelihood
Expected Size
Valid until: Nov 6th, 2020 8:00AM
