Avalanche Forecast

Issued: Mar 14th, 2020 4:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs and Deep Persistent Slabs.

Avalanche Canada JMackenzie, Avalanche Canada

Watch for multiple layers of wind slabs in wind prone areas. Solar input could be intense by Sunday afternoon. Keep an eye on localized conditions.

Summary

Confidence

Moderate -

Weather Forecast

Sunday should be sunny and warm with temps near -3 by the afternoon. Winds will shift to the SW and be light. No precipitation is expected for the next couple of days.

Avalanche Summary

Nothing new observed today, but visibility was limited.

Snowpack Summary

A couple of cm's of fresh snow in the past 24 hours. The wind slabs (numerous generations) still dominate the landscape in the Alpine and open areas at Treeline. While becoming less sensitive to human triggering, be cautious in steep, convex and unsupported terrain. The mid-pack remains quite strong, and by contrast, the basal facets are still weak. The deep persistent slabs are more of a concern in shallow snowpack areas and rocky outcroppings.

Watch for moist snow on solar aspects by Sunday afternoon. The heat could also make the triggering of some features more sensitive.

Terrain and Travel

  • Expect slab conditions to change drastically as you move into wind exposed terrain.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Avoid shallow snowpack areas, rock outcroppings and steep convex terrain where triggering is most likely.
  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.
  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.

Problems

Wind Slabs

An icon showing Wind Slabs

Wind slabs are still a concern in the Alpine and Treeline elevation bands. Multiple layers of wind slab may be found in wind prone areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2.5

Deep Persistent Slabs

An icon showing Deep Persistent Slabs

This layer is still out there, and is most concerning in shallow, rocky areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely

Expected Size

1.5 - 3

Valid until: Mar 15th, 2020 4:00PM

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