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 4th, 2021–Apr 5th, 2021

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

Regions

Jasper.

!Solar aspects are of most concern!Loose wet should be on your mind at tree line and below. While committing to tree line and steep alpine, carefully assess for sun crust below.Polar aspects have a lot of fun turns to offer.

Weather Forecast

Monday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: High -4 °C. Ridge wind west: 15 km/h. Freezing level: 1800 metres.

Tuesday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: Low -7 °C, High -3 °C. Ridge wind southwest: 15 km/h gusting to 45 km/h. Freezing level: 1900 metres.

Snowpack Summary

HST of 10-30cm of new snow becoming moist TL and below on solar aspects. Shifting winds forming isolated wind slabs at TL and ALP. The snowpack shows good bonding in field tests in deeper snowpack areas, shallow snowpack regions such as Whistler/Portal and Bald Hills have bigger a potential for weak layers to wake up and are more complex to assess.

Avalanche Summary

Sunday patrol in the Icefields region observed several small loose wet at TL and below on steep solar aspects. Few storm slabs observed up to size 2 on solar aspects at TL where suspected sun crust from March 19th is more developed. 1 large size 3 cornice triggered slab avalanche seen on Churchil Range, this avalanche ran on deeper instabilities.

Confidence

Freezing levels are uncertain

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.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.