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Archived

Avalanche Forecast

Mar 10th, 2021–Mar 11th, 2021
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
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

Regions: Northwest Inland.

New wind slab formation may occur on Thursday as a multi-day storm rolls in.

Confidence

High -

Weather Forecast

WEDNESDAY NIGHT: Partly cloudy, 20 km/h west wind, alpine temperature -8 C.

THURSDAY: Cloudy with snowfall, accumulation 2 to 5 cm, 40 km/h west wind, alpine temperature -7 C.

FRIDAY: Cloudy with snowfall, accumulation 10 to 20 cm, 40 km/h southwest wind, alpine temperature -5 C.

SATURDAY: Cloudy with snowfall, accumulation 10 to 20 cm, 30 km/h south wind, alpine temperature -3 C, freezing level 1400 m.

Avalanche Summary

No new avalanches were observed on Wednesday at the time of writing. Looking ahead, newly formed wind slabs will be the primary concern on Thursday. 

Snowpack Summary

An incoming storm will bring strong southwest wind and a bit of new snow on Thursday, forming wind slabs at treeline and alpine elevations. The new snow may overly widespread wind affect at alpine elevations, feathery surface hoar on northerly aspects and in sheltered terrain features around treeline, or a melt-freeze crust on southerly aspects and below treeline.

There are presently no widespread deeper concerns. However, faceted snow at the base of the snowpack exists in much of the region and always has the potential of being triggered in shallow, rocky slopes.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Avalanche Problems

Wind Slabs

As a storm starts impacting the region on Thursday, new snow and strong wind may form new wind slabs. The most likely place to find them will be in steep terrain features adjacent to ridges. Look for signs of instability and be cautious if you enter steep features.

Aspects: North, North East, East, South East, South, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2