Avalanche forecast

South Rockies

Apr 8 – 9, 2023Avalanche Canada
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Avalanche danger

Mon
Tue
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low

Highlights

Continue to use good travel habits, and use extra caution around thin, rocky start zones.

Reactive wind slabs could linger below ridgetops and in cross-loaded gully features.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5

    Expect small pockets of reactive windslab to form on leeward slopes due to 5-10 cm of recent snow and strong southwest winds in the high alpine.

    Use extra caution below ridgecrests and in cross-loaded features. Watch for signs of instability like shooting cracks.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely
    Size
    2–4

    The base of the snowpack remains weak. Avoid thin, rocky start zones and shallow areas with variable snowpack depths.

Confidence

High

Avalanche Summary

No new avalanches were reported before 4 pm on Saturday.

On Wednesday, a Mountain Information Network (MIN) post from the Bootleg area, west of Kimberly, reported several small (size 1) windslab avalanches below ridgetops. See more details here.

If you head out in the backcountry, let us know what you are seeing by submitting a report to the Mountain Information Network.

Snowpack Summary

In the far west of the forecast area, 5-10 cm of new snow may sit on the surface. In general, dry snow remains on shaded (northerly) slopes, and moist snow or thin crusts on solar aspects. Below treeline, expect to find moist snow or a surface crust on all aspects.

The mid snowpack is generally settled and strong, except in areas with snow depths less than 150 cm. In these lower snow areas, the mid-pack is likely weaker and more faceted.

The lower snowpack includes a layer of large, weak facets and/or depth hoar crystals.

Weather Summary

Saturday Night

Mostly clear. No new snow/rain expected. Freezing level around 1700 m. Light southwest ridgetop wind trending to strong at high elevations.

Sunday

Mostly cloudy with a potential sunny period mid-day. No new snow expected. Freezing level 2000-2500 m. Treeline temperature around 0 °C. Light southwest ridgetop wind, trending to strong at higher elevations.

Monday

Cloudy. Moderate to heavy rain. 15-20 mm West of Kimberly, isolated areas of 30mm+, 5-10 mm around Elkford. Snow line around 2200m. Moderate southwest ridgetop wind, trending to strong at higher elevations.

Tuesday

Mostly Cloudy. Moderate rain overnight turning to snow as the snow/rain line drops to 1000 m. Light southwest ridgetop wind trending to moderate at higher elevations.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.
  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.

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