Avalanche Forecast
Issued: Apr 12th, 2021 8:00AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Cornices.
Kate Ryan,
Don't forget it's still winter in the mountains. There is still almost 4m of snow at treeline!
Keep that mindset as you assess the recently formed wind slab in your travels today.
Summary
Weather Forecast
Hello high pressure! A Rex Block settles in that will result in sunny and dry conditions with elevated freezing levels into the foreseeable future.
Today: Sunny with cloudy periods. Freezing level 1600m. Wind E 15-30km/h
Tonight: Clear with cloudy periods. Fzl to valley bottom. Wind E-20km/h
Tuesday: Sunny! Fzl 1900m. Wind E 15-25km/h
Snowpack Summary
30cm of new snow on Friday/ Saturday with strong S winds fell on top of the April 7th sun crusts, wind pressed surfaces and melt freeze crusts at low elevations. The March 18 crust is down 90cm. A very strong and dense mid and lower pack sits on up to 50cm of decomposed crusts and large facetted crystals near the ground
Avalanche Summary
A new cornice release sz 2.0 was seen yesterday morning from Grizzly path. Several sz 1 ski cuts and natural avalanches have been reactive on small features on all aspects this week. A sz 2.5 natural was observed from MacDonald Gully 5 on Friday. Glide slabs are still releasing unpredictably, a sz 3 and a sz 4 last week on the S side of Mt Tupper.
Confidence
Problems
Wind Slabs
30cm of recent snow has settled and drifted into a slab, up to 50cm deep in places. The slab has had a couple days to settle, but expect there to still be pockets reactive to human triggering.
- Watch for signs of instability such as whumpfing, or cracking.
- Use caution in lee and cross-loaded terrain near ridge crests.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Cornices
Natural cornice failures continue. Avoid exposure to cornices while approaching ridge tops and on ascents from below
- Extra caution needed around cornices with current conditions.
Aspects: North, North East, East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 13th, 2021 8:00AM
