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Archived

Avalanche Forecast

Mar 30th, 2021–Mar 31st, 2021
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

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

Avalanche Problems

Storm Slabs

A significant storm Sunday brought plenty of snow, wind, and warm temperatures to Rogers Pass.  Cooler temps since seem to have decreased sensitivity of this layer, but it still deserves respect especially in wind affected areas.

  • Watch for signs of instability such as whumpfing, or cracking.
  • Use caution in lee and cross-loaded terrain near ridge crests.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5