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Avalanche Forecast

Archived

Mar 2nd, 2023–Mar 3rd, 2023

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Lizard-Flathead, Akamina, Flathead, Lizard.

carefully assess new snowfall amounts as you move through terrain. Convective flurries can result in localized significant snowfall and increased hazard.

Confidence

Moderate

Avalanche Summary

On Thursday explosive control produced storm slab avalanches up to size two. No other significant avalanches were reported.

Please post your field observations and photos on the Mountain Information Network. .

Snowpack Summary

20 to 50 cm of storm snow sits on wind affected surfaces at all elevations. Deeper deposits may be found in north and east facing terrain features due to southwest winds.

The mid-snowpack is generally well settled. The lower snowpack includes a layer of weak sugary crystals near the ground. These facets are slowly gaining strength and have not produced recent avalanche activity. We continue to track the layer and watch for any signs that it could wake up and produce very large avalanches.

Weather Summary

Thursday Night

Mostly cloudy with up to 10 cm of new snow possible. Moderate westerly winds and a low of -8°C at 1800 m.

Friday

Mostly cloudy with the possibility of convective flurries bringing up to 10 cm of new snow. Light to moderate westerly winds and a high of -6°C at 1800 m.

Saturday

A mix of sun and cloud with the possibility of convective flurries bringing up to 5 cm of new snow. Light southerly winds and a high of -4°C at 1800 m.

Sunday

A mix of sun and cloud with no new snow expected. Light southeast winds and a high of -9°C at 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Be careful to keep storm day fever from luring you out into bigger terrain features.
  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.