Avalanche Forecast

Issued: Mar 25th, 2021 4:00PM

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

Avalanche Canada MBender, Avalanche Canada

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Lingering wind slabs in open terrain at upper elevations are the main concern.

Summary

Confidence

Moderate - The snowpack structure is generally well understood.

Weather Forecast

THURSDAY Night: Cloudy with clear periods and isolated flurries, light to moderate west and northwest wind, freezing level 700 m with treeline temperatures around -5 C.

FRIDAY: Mix of sun and cloud with isolated flurries, light west and southwest wind, freezing level 1600 m with treeline temperatures -1 C.

SATURDAY: Mostly cloudy with isolated flurries, light to moderate southwest wind, freezing level 1500 m with treeline temperatures -2 C.

SUNDAY: Snow, moderate to strong southwest wind, freezing 1000 m with treeline temperatures around -4 C.

Avalanche Summary

Small avalanches were triggered within recent snow on Tuesday. This was likely the case for Wednesday as well, within the 5-15 cm of overnight snow.

Looking forward, wind slabs may remain triggerable at higher elevations and use caution on sun-exposed slopes if clear skies prevail, which is forecast for the north of the region.

Snowpack Summary

Another 5 to 15 cm of snow on Wednesday adds to the 15 to 30 cm of settled snow from the weekend. All this snow is likely bonding to the snowpack, but there could be some wind slabs that linger at higher elevations from southwest wind. All this snow sits above a widespread hard crust, with the exception of high north-facing terrain. The lower snowpack is strong and settled.

Remember that cornices along ridgelines are large at this time of year and always have the possibility of failing naturally or from the weight of a human.

Terrain and Travel

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Problems

Wind Slabs

An icon showing Wind Slabs

Recent snow has likely been blown into wind slabs at higher elevations. Carefully assess for wind slabs prior to committing to steep features with high consequence.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 1.5

Cornices

An icon showing Cornices

Cornices are large and looming along many ridgelines, and have likely grown with the recent snow and wind. 

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

2 - 3

Valid until: Mar 26th, 2021 4:00PM