Avalanche forecast

Jasper

Feb 19 – 20, 2021
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Archived · expired 6 years ago

Avalanche danger

Sat
Sun
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

The Tonquin Area is officially open for winter travel. Use caution as this area is typically more shallow and therefore a weaker snowpack. Otherwise, be vigilant in all terrain for shallow locations being potential human trigger spots.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2

    Moderate to strong SW winds in the alpine and higher RH values are likely creating wind slabs.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely
    Size
    1.5–3

    Caution in thin snowpack areas where triggering is more likely. This is a low probability but high consequence problem.

Weather Forecast

Friday is expected to be sun and flurries, a trace of new snow, -9C, and Light gusting moderate SW winds. Saturday will be unsettled weather, only a trace of snow, -11 C, and light gusting strong SW winds. There may be a shift in the weather on Sunday with 18cm of snow and strong winds by the end of the day.

Snowpack Summary

Alpine winds continue to create wind slabs in high alpine lee features particularly where local terrain increases the wind action. The upper snowpack are facets and mixed forms over a supportive mid-pack. Thinner snowpack areas it is weak, un-supportive, and facetted.

Avalanche Summary

Thursday's patrol into Whistler creek did not note any new activity. Wednesday's patrol was cut short due to a rescue.

Confidence

Forecast snowfall amounts are uncertain on Sunday

Regions covered