Avalanche Forecast
Issued: Apr 20th, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
ahanna,
Avalanche Canada
Watch for pockets of wind slab forming in high leeward terrain features and be ready to dial back your terrain choices if you see more than 15 cm of new snow.
Summary
Confidence
Avalanche Summary
A couple of large cornice failures have been observed over the past few days. Both took place in high alpine areas in north-facing terrain. Neither of these failures propagated any weak layers on the slopes below.
Snowpack Summary
A dusting of new snow falls over a widespread melt-freeze crust on all but high north-facing alpine terrain, where dry and/or wind affected snow may persist.
Weather Summary
Saturday night
Up to 5 cm of new snow at upper elevations. 30 to 60 km/h southeast ridgetop wind. Treeline temperature -4 °C. Freezing level 1500 m.
Sunday
Cloudy with up to 10 cm of snow at upper elevations. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1800 m.
Monday
Mostly cloudy, clearing in the evening. 10 to 30 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1800m.
Tuesday
A mix of sun and cloud. 10 to 30 km/h southeast ridgetop wind. Treeline temperature -1 °C. Freezing level 1800m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Fresh wind slabs will likely form throughout the day, diligently watch for changing conditions.
- Wind slabs are most reactive during their formation.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
Problems
Wind Slabs
Wind slabs are possible where wind has deposited sufficient snow into lee terrain features at upper elevations. Wind slabs may be especially reactive where they sit over a crust.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 21st, 2024 4:00PM
