Avalanche forecast

Jasper

Jan 6 – 7, 2021
View on map
Archived · expired 6 years ago

Avalanche danger

Thu
Fri
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low
Open full map

Highlights

Strong SW winds continue to build wind slabs tree line and above.  Although natural avalanche activity has decreased, conservative terrain selection is still advised.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2.5

    Consistent strong SW winds continue to form wind slabs treeline and above. 

  • Persistent Slabs

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

    Use caution around thin to thick areas where buried weak layers could be triggered.

  • Deep Persistent Slabs

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

Weather Forecast

Wednesday will see flurries with up to 10cm accumulating.  Ridge top winds will remain moderate to strong from the southwest.  Freezing level will remain at valley bottom high near -7.

Thursday mix of sun and cloud with no precipitation expected.  Winds will become light; high near -9.

Snowpack Summary

Up to 45cm of new snow this past weekend is being redistributed by strong SW winds. This new snow has further buried the mid-Dec persistent layers (surface hoar and facet combo) down 40-70cm. The mid-pack is supportive where snow is deeper than 60cm. The bottom of the snowpack consists of facets and depth hoar.

Avalanche Summary

Serval large natural avalanches were observed over the weekend in the alpine on all aspects. Avalanche control had varied results from no results to several size 3 wind slabs stepping down to deep weakness on all aspects in the alpine.

No new naturals observed today Hilda area.

Make your field trip observations count! Mountain Information Network.

Confidence

Wind effect is extremely variable

Regions covered