Avalanche forecast

Jasper

Nov 27 – 28, 2020
View on map
Archived · expired 6 years ago

Avalanche danger

Sat
Sun
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low
Open full map

Highlights

Additional snow and relentless winds will keep the hazard elevated in the alpine and Upper Treeline until we see both relax. Great skiing can be found in sheltered locations. Continue to submit to the MIN if and when you can.

Avalanche problems

  • Wind Slabs

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

    New snow and strong winds are contentiously building fresh wind slabs. Watch for freshly buried wind slabs with the incoming snow.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3

    Pockets of previous wind deposited snow overlies the Nov 4 rain crust. Test results are mixed on this layer. Small incremental loads will continue to test this layer

  • Loose Dry

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

    More snow in the forecast means more snow on canyon walls and above ice climbs, Be aware of overhead and changing condition.

Weather Forecast

Thursday evening and in to friday we can expect to see overcast skies and about 10cm of snow with winds up to 40km/h from the SW. Alpine temperatures well remain seasonably warm around -8.

Saturday will see an additional 5cm with cooling temperatures -13 with appearances from the sun

Snowpack Summary

The snowpack is highly variable depending on location. Height of snow at Parkers is ~100cm at treeline. The Nov.4 crust found up to 2600m, and is ~70cm deep. Test results today showed hard results CTH23 failing on the basal weakness. Continued wind slab developing on N and E aspects ridge top down into treeline. Basal layers continue to weaken.

Avalanche Summary

A field team was in the Hilda peak area today and noted 1 loose dry avalanche from steep N facing alpine terrain and 1 Na Sz1.5 wind slab in the boundary slide paths. good visibility throughout the day.

Confidence

Regions covered