Avalanche forecast

Jasper

Nov 17 – 18, 2015Parks Canada
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Archived · expired 11 years ago

Avalanche danger

Tue
Wed
Alpine
4 · High
Treeline
3 · Considerable
Below
1 · Low
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Highlights

Strong winds and new snow sure to obscure visibility to hazards above. Choose your terrain and exposure time wisely. 

Avalanche problems

  • Loose Dry

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    Point releases from cliffs and steep smooth surfaces. Ridge top winds have be perfect for creating soft slabs and smaller, but weak cornices over exposed areas. Watch these when climbing even low hazard Ice.

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    Anywhere between 85 - 100cm of new snow in the Icefields area. Southerly ridge top winds have picked up and soft slabs are starting to form in the lee. Expect deep trail breaking below treeline.

Weather Forecast

A new storm is tracking in from the coast and is expected overnight bringing moderate to strong SW-ly winds. A further 10cm is expected overnight Monday and as much as a 30cm possible by the end of the day Tuesday.

Snowpack Summary

Snow depths are variable between 70 to 140 cm observed in the Icefields. Generally unsupportive below treeline and improving at you approach TL and above. Moderate to strong ridge top winds have created soft slabs on top of a weak snowpack. 

Avalanche Summary

Field observations have found a very extensive storm cycle on all aspects between 2200 to 3200m ranging from size 2 to 3 running on ground to mid-path. Most recently, 3 significant events on Mt Amery area (just north of Sask River crossing) observed in last 24 hours, sz 3 and sz 2.5's on NE-ly aspects in cross loaded features running on ground.

Confidence

Forecast snowfall amounts are uncertain on Tuesday

Regions covered