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Archived

Avalanche Forecast

Feb 3rd, 2025–Feb 4th, 2025
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Cold temperatures are keeping the storm slab active

Confidence

High

Avalanche Summary

Over the weekend, numerous storm slab avalanches were reported, failing on a crust or facet layer beneath the storm snow. Most were artificially triggered by humans or explosives, size 1-2. Some were triggered remotely or sympathetically. The deepest crowns were on wind-loaded northerly aspects just below ridgetop.

Snowpack Summary

30 to 50 cm of snow fell over the weekend. Generally, sheltered snow quality has been excellent, with wind redistribution occurring near ridgetops.

This recent snow is bonding poorly to an underlying weak layer formed during the January drought. Depending on aspect and elevation, the layer may exist as a hard crust, faceted grains and/or surface hoar.

The mid and lower snowpack is well-settled and bonded with no other layers of concern.

Weather Summary

Monday Night

Partly cloudy, trace of new snow. 5 to 15 km/h east-northeast ridgetop wind. Treeline temperature -17 °C.

Tuesday

A mix of sun and cloud. 10 to 15 km/h northeast ridgetop wind. Treeline temperature -17 °C.

Wedneday

Sunny. Calm. Treeline temperature -14 °C.

Thursday

Clear skies. Calm. Treeline temperature -12 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Use careful route-finding and stick to moderate angled slopes with low consequences.
  • Avoid lee and cross-loaded slopes in the alpine.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.

Avalanche Problems

Storm Slabs

Storm slabs sit over a weak layer and remain triggerable by riders. The most likely places to trigger an avalanche are in wind-loaded lee terrain features just below ridgetops and convex rolls.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5