Avalanche Forecast

Issued: Nov 28th, 2022 4:00PM

The alpine rating is considerable, the treeline rating is moderate, and the below treeline rating is low. Known problems include Storm Slabs.

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Because of the thin, soft, early season snowpack the best riding will also be where avalanches are most likely. Avoid overhead hazards, keep slope angles moderate, and stick to places sheltered from the wind.

Summary

Confidence

Moderate

Avalanche Summary

On Sunday there was a natural avalanche cycle in the Lizard Range, mostly size 2 but up to size 3. Avalanches were running within the storm snow but the odd sympathetic release suggests facets or surface hoar at the bottom of the recent snow (see Snowpack Section). This type of problem may linger.

Snowpack Summary

Upper snowpack: consists of the 45 to 60 cm of snow over the past week. At the bottom of this recent snow is a layer of surface hoar. Take a look under the hood from Harvey Pass. ESPeters10 - thanks for sharing.Northeast winds (reverse loading) created pockets of wind slab in some non-typical places.

Lower Snowpack: sugary faceted snow and with a rain crust just above the ground.

Snowpack depths at treeline are 45 to 75 cm, and in the alpine 65 to 125 cm.

Weather Summary

Monday NightLight northeast wind, temps in the minus teens to twenty. Dry.

TuesdayDry, minus twenties style cold, light variable wind becoming southwesterly late in the day.

Wednesday

Weak disturbance means overcast, southwesterly light to moderate wind, warming temperatures to near -10 C and 5 to 15 cm of snow. Wind is forecast to strengthen late in the day and overnight!

Thursday

Light to moderate southwesterly wind, temperatures in the minus teens, trace to 10 cm of snow.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Be especially cautious as you transition into wind affected terrain.

Problems

Storm Slabs

An icon showing Storm Slabs

It's possible avalanches can scrub down into the faceted lower snowpack. This suggests the possibility of wider and larger events than normally expected.

Thin early season snow depths mean you'll be searching for deeper areas to ride; that'll take you to where avalanches are most likely. Selecting moderate (less steep) slopes will help manage both early season hazards (like knee and A-arm wrecking rocks) and avalanche hazards. Less windy areas will be the sweet spot for both best riding quality and avoiding avalanche issues.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 2.5

Valid until: Nov 29th, 2022 4:00PM

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