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Avalanche Forecast

Archived

Apr 16th, 2019–Apr 17th, 2019

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

Regions

South Coast Inland.

You may find fresh wind slabs up high from new snow and strong southwest wind.

Confidence

High -

Weather Forecast

TUESDAY NIGHT: Cloudy with snowfall, accumulation 5 to 10 cm, moderate to strong southwest wind, alpine temperature -5 C, freezing level 1400 m.

WEDNESDAY: Cloudy with snowfall, accumulation 5 cm, light to moderate southwest wind, alpine temperature -4 C, freezing level 1500 m.

THURSDAY: Mix of sun and cloud with isolated flurries, light to moderate southwest wind, alpine temperature 1 C, freezing level 2400 m.

FRIDAY: Cloudy with rain switching to snow, accumulation 10 mm rain followed by 5 to 10 cm of snow, light to moderate southwest wind, alpine temperature 0 C, freezing level 2400 m dropping to 1700 m.

Avalanche Summary

Explosives triggered small cornice chunks on northerly ridges on Monday. The chunks did not trigger slabs on the slopes below.

If you have any recent observations during your travels, we would greatly appreciate it if you posted a photo or any other information to the Mountain Information Network (MIN). Thanks!

Snowpack Summary

New wind slabs may from with around 10 cm of new snow and strong southwest wind. A melt-freeze crust or moist surface snow is expect below around 1500 m. The remainder of the snowpack is consolidated and strong. The snowpack is rapidly melting below treeline.

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.