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Avalanche Forecast

Apr 24th, 2023–Apr 25th, 2023
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
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
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Coquihalla, Harrison-Fraser, Manning, Skagit.

Sunny skies and a rising freezing level will increase avalanche danger during the heat of the day.

Confidence

Moderate

Avalanche Summary

The weekend saw numerous small to large (size 1 to 2) wet loose avalanches that were naturally triggered out of steep, rocky terrain features.

We expect to see similar avalanches in the coming days during periods of sunny skies and an increasing freezing level.

Use plenty of caution along alpine ridges, where cornices may be large.

Snowpack Summary

Moist snow is found on all aspects up to 2000 m, which will freeze into a melt-freeze crust overnight.

The remainder of the snowpack is strong with varying hard snow layers and bonded melt-freeze crusts.

Cornices are large along many alpine ridges.

Weather Summary

Monday Night

Cloudy with light snowfall, accumulation 1 to 3 cm, 30 km/h southwest wind, treeline temperature -4 °C, freezing level 1300 m.

Tuesday

Morning clouds and afternoon sunny skies with no precipitation, 20 km/h southwest wind, treeline temperature -3 °C, freezing level 1500 m.

Wednesday

Mix of sun and cloud with no precipitation, 40 km/h southwest wind, treeline temperature 4 °C, freezing level 2700 m.

Thursday

Mix of sun and cloud with no precipitation, 10 km/h variable wind, treeline temperature 7 °C, freezing level 3500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • A moist or wet snow surface, pinwheeling and natural avalanches are all indicators of a weakening snowpack.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Avalanche Problems

Loose Wet

Wet loose avalanche activity is expected to continue during periods of strong sun and with daytime warming. Limit your exposure to steep terrain on sun-exposed slopes and when the snow starts feeling sloppy.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 1.5

Cornices

Cornices are large at this time of year and will become more prone to fail as they warm up with spring weather. Stay well back from them when travelling on ridgelines and limit your exposure when travelling on slopes below them.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3