Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Apr 7th, 2022–Apr 8th, 2022

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

Regions

Yukon.

Southerly wind formed wind slabs in lee terrain features in the alpine and at treeline. These wind slabs might be reactive to human triggers. 

Confidence

Moderate - Uncertainty is due to the timing or intensity of solar radiation and its effect on the snowpack.

Weather Forecast

Thursday night: Mix of clouds and clear sky, up to 2 cm snow, moderate south wind, alpine low -6 °C, freezing level at valley bottom.

Friday: Mix of sun and cloud, trace of new snow, light west wind, alpine high -3 °C, freezing level at valley bottom.

Saturday: Mix of sun and cloud, trace of new snow, light northerly wind, alpine high -5 °C, freezing level at valley bottom. 

Sunday: Sunny, trace of new snow, moderate to strong northeast wind, alpine high -4 °C, freezing level at valley botttom.

Avalanche Summary

A few wet loose avalanches were observed starting at sun-exposed rocks in the afternoon on Wednesday.

No new avalanches were reported on Tuesday.

Many small natural wind slabs and dry loose avalanches up to size 1.5 occurred on Monday. A couple naturally triggered size 2 wet slab avalanches were observed on steep, solar aspects. 

Snowpack Summary

30 cm of recent snow sit on a hard surface of either wind-pressed old snow or sun crusts on solar aspects. Recent snow amounts taper with lower elevations. The surface snow is wind affected in many places and has a sun crust on sun-exposed slopes up into lower alpine elevations. 

A strong mid-pack sits on top of weak facets near the ground.

Cornices are very large and exposure to them should be minimized, especially during warm or windy weather.

Terrain and Travel

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Minimize your exposure time below cornices.
  • Cornices become weak with daytime heating or solar exposure.

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.