Avalanche Forecast
Issued: Apr 2nd, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs.
mconlan,
Avalanche Canada
Avalanche danger is expected to increase over the day as a storm impacts the region.
Summary
Confidence
Moderate - Uncertainty is due to the timing, track, & intensity of the incoming weather system.
Weather Forecast
FRIDAY NIGHT: Cloudy with early-morning snowfall, accumulation 2 to 5 cm, 20 km/h southwest wind, alpine temperature -6 C.
SATURDAY: Cloudy with snowfall, accumulation 10 to 20 cm, 40 km/h southwest wind, alpine temperature -4 C, freezing level 1400 m.
SUNDAY: Early-morning snowfall then clearing, accumulation 5 to 10 cm, 20 km/h northwest wind, alpine temperature -8 C.
MONDAY: Clear skies, 10 km/h northwest wind, alpine temperature 0 C, freezing level rising to 2000 m.
Avalanche Summary
No new avalanches were observed on Thursday. Looking forward, avalanche activity may spike during stormy conditions on Saturday and into the night.
Snowpack Summary
A storm will bring snow above around 1400 m and strong southwest wind. Around 10 to 20 cm is expected to accumulated by Saturday afternoon, forming new storm slabs in sheltered terrain and wind slabs in exposed terrain at high elevations. The snow may take a few days to bond to an underlying melt-freeze crust everywhere except on north aspects above 1600 m. Below the rain-snow line, rain will soak an already moist snowpack.
Cornices are large and looming along ridgelines. Their release is unpredictable, requiring a large berth if you're travelling above or below them.
Terrain and Travel
- Watch for fresh storm slabs building throughout the day.
- Wind slabs are most reactive during their formation.
- Make observations and assess conditions continually as you travel.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
Problems
Storm Slabs
New slabs may form as a storm impacts the region. Storm slabs may build by the end of the day with forecasted 10 to 20 cm of snow above 1400 m. Wind slabs may form in lee terrain features at high elevations from strong southwest wind. Assess for slab formation before committing yourself to consequential terrain features.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Apr 3rd, 2021 4:00PM
