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Archived

Avalanche Forecast

Apr 8th, 2024–Apr 9th, 2024
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Start on small features and retreat to mellower terrain if you find signs of instability.

Human triggered storm slab avalanches remain likely.

Confidence

Moderate

Avalanche Summary

On Sunday, northeast of Stewart, a couple of large (up to size 2.5) helicopter triggered avalanches were reported on wind-loaded northwest facing slopes in open, treeline terrain.

If you are getting out in the backcountry, consider making a post on the MIN (Mountain Information Network).

Snowpack Summary

30-75 cm of settling snow sits on a widespread crust in all but sheltered, north-facing slopes at treeline and above. This crust was formed in early April, and where it doesn't exist, isolated pockets of small surface hoar (weak feathery crystals) and/or loose, sugary faceted snow may be found.

Moderate to strong south or southwest winds have likely formed deeper, more reactive deposits of snow in leeward terrain.

Previously problematic layers deeper in the snowpack appear to have bonded and strengthened, however, there is a small chance that they could remain a risk in steep, north-facing, high alpine terrain.

Weather Summary

Monday Night

Cloudy. 5 to 10 cm of snow expected above 500 m. Moderate to strong southwest ridgetop wind. Treeline temperature around -5 °C.

Tuesday

Cloudy. 0 to 1 cm of snow expected above 750 m. light to moderate southwest ridgetop wind. Treeline temperature around -4 °C.

Wednesday

Mostly cloudy. 7 to 10 cm of snow expected above 800 m. Moderate to strong south ridgetop wind. Treeline high around -2 °C.

Thursday

Mostly cloudy. 8 to 15 cm of snow expected above 1000 m. Moderate to strong south ridgetop wind, dying down through the day. Treeline high around -1 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Avoid steep convex slopes.
  • Make observations and assess conditions continually as you travel.
  • Avoid areas where the snow feels stiff and/or slabby.

Avalanche Problems

Storm Slabs

Consistent snowfall has added up 30 to 60 cm of soft surface snow, and human triggered avalanches remain likely in treeline and alpine terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5