Avalanche Forecast

Issued: Mar 31st, 2023 4:00PM

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

Avalanche Canada shorton, Avalanche Canada

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Human triggered avalanches are most likely where wind has formed deep deposits of new snow.

Summary

Confidence

Moderate

Avalanche Summary

We suspect some natural avalanches will occur in alpine terrain during the peak of the storm on Friday night, and then human-triggered wind slabs will remain possible over the weekend as the new snow gradually strengthens.

Snowpack Summary

As the storm winds down on Saturday morning there could be 25 to 40 cm of new snow on the west island and 15 to 25 cm on the east side of the island. In most areas this snow has fallen on moist or crusty snow layers, except for shaded terrain above 1600 m. The new snow is expected to bond well to the old layers in most areas, but could potentially be poor in isolated terrain features. The middle and lower snowpack are strong and bonded.

Weather Summary

Friday night

Cloudy, scattered flurries with 2 to 8 cm of snow, 40 km/h southwest wind, treeline temperatures around -5 °C with freezing level dropping to 500 m.

Saturday

Mix of sun and cloud with scattered flurries bringing up to 5 cm of snow, 30 km/h southwest wind, treeline temperatures around -2 °C with freezing level around 800 m.

Sunday

Mix of sun and cloud with some light flurries starting in the afternoon, 10 km/h northwest wind, treeline temperatures around -2 °C with freezing level around 800 m.

Monday

Mostly sunny, 30 km/h northwest wind, treeline temperatures around -1 °C with freezing level around 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be carefull around freshly wind loaded features.
  • Carefully monitor the bond between the new snow and old surface.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Dial back your terrain choices if you are seeing more than 25cm of new snow.

Problems

Wind Slabs

An icon showing Wind Slabs

New snow amounts are variable across the island, but the most concerning terrain will be lee features where wind has formed deeper deposits of snow.

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

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Apr 1st, 2023 4:00PM

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