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Avalanche Forecast

Archived

Apr 15th, 2022–Apr 16th, 2022

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

Regions

South Coast.

Monitor surface conditions as you move through aspects and gain elevation. Watch for dense, wind affected snow at higher elevations and moist or wet surface snow if the sun starts to shine. 

Check out the new forecaster blog if you're considering big lines this weekend.

Confidence

Moderate - Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack. Uncertainty is due to the timing or intensity of solar radiation and its effect on the snowpack.

Weather Forecast

A cool and unsettled flow will affect coastal regions into the weekend. Convective flurries are expected in isolated areas and may be heavy at times. 

FRIDAY NIGHT: Mostly cloudy skies with flurries bringing only a trace overnight. Light easterly winds continue with freezing levels dropping to 500 m.

SATURDAY: A mix of sun and cloud with moderate easterly winds. Freezing levels rise to 1000 m. Flurries bring trace amounts of snow.

SUNDAY: Cloud clears in the afternoon with increasing southeasterly winds. Freezing levels rise to 1300 m. Isolated flurries are expected to bring trace amounts. 

MONDAY: Snow begins in the morning with 10-20 cm expected, freezing levels remain around 1000 m. Strong southeast winds ease to moderate over the day with mostly cloudy skies. 

Avalanche Summary

No new avalanches were reported on Thursday. 

A size 1 slab avalanche was reported on a north facing slope on Wednesday. The avalanche was 25 cm deep and failed on the interface between storm snow and the underlying crust indicating a poor bond. 

Observations are limited at this time of year, so please consider posting to the Mountain Information Network.

Snowpack Summary

Recent storm snow of 10-30 cm has begun to settle over a widespread and supportive crust. Wind affected snow can now be found mainly on south and west aspects at treeline and above, from recent easterly winds. Watch for large, overhanging cornices when travelling on or below ridgelines. Reports suggest they are large and weak, and could fail from your weight. 

A melt freeze crust can be found on the surface of south facing slopes at treeline and below. Periods of sun may soften or break down the crust throughout the day.

The mid and lower snowpack is considered strong while temperatures remain cool, consisting of hard snow and melt freeze crusts. 

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Sheltered slopes at lower elevations will offer the best riding.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet

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.