Archived

Avalanche Forecast

Apr 10th, 2023–Apr 11th, 2023

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

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

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

1: Low

The avalanche danger rating in the alpine will be low

Treeline

1: Low

The avalanche danger rating at treeline will be low

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Regions: East Island, North Island, South Island, Vancouver Island, West Island.

Storm slabs are likely reactive to human triggers at treeline and above; especially in wind affected terrain.

Choose conservative terrain and watch for clues of instability.

Confidence

Moderate

Avalanche Summary

No avalanches were reported in this region on Sunday, but observations are very limited.

On Friday and Saturday, avalanche activity included natural and human triggered size 1-2; storm slabs and loose dry at dry upper elevations and wet slabs and loose wet at lower elevations where precipitation fell as wet snow or rain.

Observations are limited at this time of year, please consider sharing any information or photos you have on the Mountain Information Network to help guide our forecasts.

Snowpack Summary

Around 25-50 cm of heavy, wet new snow exists between 1000-1400 m. Above 1400 m, dry snow has likely been redistributed into deeper deposits on north-facing terrain features by strong southerly winds. Below 1000 m, rain has saturated the snowpack.

The storm snow sits over a melt-freeze crust at mid-elevations, and over settling dry snow at high elevations on shaded slopes. The middle and lower snowpack is strong and well-bonded.

Weather Summary

Monday night

Cloudy with flurries; 3-10 cm / 30 km/h south ridgetop wind / Temperature at treeline around -3 C / Freezing level 700 m

Tuesday

Mix of sun and cloud with isolated flurries; 3-10 cm / 20 km/h west ridgetop wind / Temperature at treeline around -1 C / Freezing level 900 m

Wednesday

Sunny / 10 km/h north ridgetop wind / Temperature at treeline around 3 C / Freezing level 1300 m

Thursday

Cloudy / 20 km/h west ridgetop wind / Temperature at treeline around 0 C / Freezing level 1100 m

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

Choose conservative terrain and watch for clues of instability.
Be especially cautious as you transition into wind affected terrain.
Continue to make conservative terrain choices while the storm snow settles and stabilizes.

Avalanche Problems

Storm Slabs

Storm slabs are likely reactive to human triggers at treeline and above; especially in wind affected terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5