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Avalanche Forecast

Archived

Feb 23rd, 2024–Feb 24th, 2024

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

Regions

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

Avoid steep slopes during periods of heavy rain.

Confidence

High

Avalanche Summary

Several wind slab avalanches have been observed on alpine features over the past few days (up to size 2). However, the main concern on Saturday will be wet loose avalanches caused by the rain.

Snowpack Summary

The top 30 to 40 cm of soft dry snow will become rain-soaked on Saturday.

This soft snow sits atop a widespread crust layer. The snow is generally strong and bonded beneath this crust.

Snow depths in wind-sheltered areas average about 100 cm.

Weather Summary

Friday Night

Cloudy. 20 km/h southwest wind. Mountain temperatures around -5 °C.

Saturday

Cloudy with heavy rain, up to 50 mm in the south and 30 mm in the north. 60 km/h south wind. Freezing level climbing to 1200 m with mountain temperatures around +2 °C.

Sunday

Flurries with up to 5 cm of snow overnight then partly clearing skies throughout the day. 40 km/h west wind. Mountain temperatures cooling to -8 °C.

Monday

Mostly sunny. 20 km/h southwest wind. Mountain temperatures around -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Minimize exposure during periods of heavy loading from rain.
  • The first few hours of rain will likely be the most dangerous period.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.