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Avalanche Forecast

Archived

Mar 17th, 2023–Mar 19th, 2023

Alpine
Below Threshold.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Below Threshold.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

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Some new snow continues to accumulate above the melt-freeze crust and small isolated wind slabs are possible in leeward areas.

Despite a LOW danger rating, beware of accumulations of wind transported snow covering the melt-freeze crust, especially on steep slopes.

Please share your observations of the conditions with other users on the Mountain Information Network

Confidence

High

Avalanche Summary

No new avalanches were observed or reported.

Thanks for contributing to the collection of this valuable data by sharing with other users on the Mountain Information Network or by writing to us directly at [email protected].

Snowpack Summary

A few centimeters of new snow will be added on top of the widespread melt-freeze crust that is present on the surface or barely covered by a few centimeters of snow. In downwind areas, small isolated wind slabs up to 10-30 cm are found above the crust resulting from the freeze-thaw cycles of the past week. The middle and base of the snowpack remain well consolidated.

In general, the height of the snowpack varies from 80 to 180 cm.

Weather Summary

Synopsis: A low pressure system from the Great Lakes will bring some snow over the weekend.

Friday evening and night: Snow, 3-5 cm, southerly winds 30 to 50 km/h, minimum -3 C, freezing level at valley bottom.

Saturday: Periods of light snow, no accumulation, southerly winds 15 to 30 km/h, maximum +2 C, freezing level at 750 m.

Sunday: Flurries, 3-5 cm, westerly winds 40 to 60 km/h, maximum -1 C, freezing level at valley bottom.

Monday: A mix of sun and cloud, no precipitation, northwesterly winds 40 to 60 km/h, maximum -7 C, freezing level at valley bottom.

Terrain and Travel Advice

  • Approach lee and cross-loaded slopes with caution.
  • Carefully evaluate steep lines for wind slabs.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.