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Avalanche Forecast

Archived

Mar 22nd, 2024–Mar 23rd, 2024

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

Regions

Long Range Mountains, Corner Brook, Gros Morne, Northern Peninsula.

New snow and wind will create dangerous conditions on steep wind-loaded slopes.

Confidence

Moderate

Avalanche Summary

A few small (size 1) wind slab avalanches were observed over the past few days. Wind slabs will grow and become larger and more reactive over the weekend.

Snowpack Summary

10 to 20 cm of new snow by Saturday morning is adding to 20 to 40 cm from the past week. This recent snow has accumulated above a widespread crust layer.

Extreme southwest wind will scour windward slopes and form deep deposits on lee terrain features.

Many parts of the region have low snow coverage and lower elevation terrain is likely thin and rocky.

Weather Summary

Friday Night

Flurries with 10 to 20 cm of snow. 80 km/h southwest wind. Mountain temperatures -4 °C.

Saturday

Cloudy with a trace of snow. 60 km/h southwest wind. Mountain temperatures -5 °C.

Sunday

Stormy with an uncertain mix of rain and snow. Latest models suggest:

  • 30 to 40 mm of rain in the south.

  • A mix of rain and snow around Gros Morne with 5 to 10 cm of wet snow.

  • 15 to 25 cm of snow in the Northern Peninsula.

100 km/h southwest wind. Freezing level rises to 2000 m in the south, 1000 m in Gros Morne, and sea level in the north.

Monday

Mix of sun and cloud. 25 km/h north wind. Mountain temperatures -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Choose low-angled, sheltered terrain where new snow hasn't been wind-affected.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Use ridges or ribs to avoid areas of wind loaded snow.

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.