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Avalanche Forecast

Archived

Apr 11th, 2022–Apr 12th, 2022

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

Regions

Jasper.

We are experiencing all freeze, no melt weather pattern. Ridgetop windslabs are spotty and on a variety of hard surfaces yet are bonding well. Avalanches could still occur in extreme terrain thus investigate and evaluate features of concern.

Weather Forecast

Select a specific area at Spot Wx for localized weather forecast conditions. Monday night will be clear with flurries, -20C, and light East winds. Tuesday will bring clouds and some sun, no new snow, -15C, and light Easterly winds. Wednesday will be similar and expect a repeat with Thursday but with more clouds.

Snowpack Summary

Up to 5cm of spotty flurries Sunday landing on a previous settled 10-15cm of soft snow over a melt freeze crust up to 2200m on all aspects. Previous light, gusting moderate, W-SW winds creating Wind slab 30cm deep in ALP have switched to a light-Moderate N-NW wind. The mid pack is supportive.

Avalanche Summary

Monday's field patrol through the Boundary Lake/Hilda glacier loop noted nothing new. Visibility was good. No patrol occurred on Saturday or Sunday and nothing new was reported. On Friday, a few dry loose avalanches up to size 1.5 occurred in steep rocky terrain from 2300-3000m plus explosives work produced a few size 1.5 loose dry avalanches.

Confidence

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.