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 15th, 2022–Apr 16th, 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.

Cornice activity remains the main concern going into the weekend. Select your route carefully to avoid exposure to cornices.

Weather Forecast

Saturday will be mainly cloudy with scattered flurries up to 5cm. Winds will be light with the freezing level rising to 1400m. Sunday will see a mix of sun and cloud with minimal winds and freezing level to 1500m. Monday will be similar with the freezing level rising to 1800m.  Solid freeze and recovery expected each night.

Snowpack Summary

Previous moderate N winds have pressed surface snow and scoured exposed features TL and above. Isolated wind slabs and large cross loaded pockets exist in the alpine but have bonded well to previous surface. On solar aspects a faceting crust exist up to 2400m under 10-15cm of snow: a 1-5cm melt-freeze crust exists to 2200m all aspects down 10cm.

Avalanche Summary

On Tuesday and Thursday two natural cornice falls were observed on the Churchill range. These cornices did not trigger slabs below.  On Wednesday a cornice triggered size 2 wind slab was observed on Pyramid; a similar observation was made from Marmot ski area off Manx peak on the same day.

Confidence

Problems

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.