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Avalanche Forecast

Archived

Mar 30th, 2021–Mar 31st, 2021

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

Carefully evaluate storm slab reactivity as you travel today.

Caution is required, especially in wind exposed areas where human triggering is likely!

Weather Forecast

Cooler and drier conditions will prevail again today. Expect all types of weather today (sun, cloud, snow, and wind), as Spring convective conditions persist. Clouds are forecast to clear this evening, and temperatures remain cool. Tomorrow, a warmer airmass begins to move in, bringing a mix of sun and cloud and freezing levels rising to 1800m.

Snowpack Summary

Since Friday, Rogers Pass has received ~85cm of snow at treeline! Strong Southerly winds and warm temperatures that accompanied the new snow has formed reactive storm slabs. The March 18th layer is now buried 40-100cm depending on aspect and elevation.

Avalanche Summary

Numerous natural and artificially triggered avalanches occurred on the weekend in the Highway Corridor. The average size was 2 to 3, with several size 3.5s, and a few size 4s. There was one skier accidental Min report from Hospital Gullies yesterday. A report from Connaught Creek yesterday mentioned Grizzly Slide Path buried the skin track.

Confidence

Due to the number of field observations

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.