Avalanche forecast

Jasper

Feb 9 – 10, 2018Parks Canada

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Archived · expired 9 years ago

Avalanche danger

Sat

Sun

Alpine

4 · High

Treeline

4 · High

Below

3 · Considerable

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Highlights

http://www.pc.gc.ca/apps/scond/Cond_E.asp?oID=30731&oPark=100244Highway 93N from Athabasca Falls to Saskatchewan River Crossing and the Maligne Lake road will remain closed for Friday. Check Alberta 511 for updated opening times.

Avalanche problems

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alpine
Treeline
Below treeline
Likelihood
Likely
Size
1–2.5
Windslabs were created over the last week with 40cm of snow and West winds. The incoming snow coupled with moderate West winds may build sensitive new storm / windslabs.
Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alpine
Treeline
Below treeline
Likelihood
Likely
Size
2–3.5
Field teams observed widespread whumpfing and moderate test results at TL during the past week. Shallow areas are the most likely triggering locations in the alpine.
Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alpine
Treeline
Below treeline
Likelihood
Very Likely
Size
1–2.5
Up to 45cm of HST fell through the forecast area, over-loading the already weak persistent slab and running far and fast.

Weather Forecast

Storm to ease overnight on Thursday, clearing Friday morning and sunny with cloudy periods over the day. Light northerly winds and alpine temperatures near -10.

Snowpack Summary

Varied HST amounts building soft storm slabs through the forecast region, up to 45cm in the southern region on Mount Wilson; 10-15cm in the Icefields. This storm slab is sitting on the weak facetted persistent slab and is running far and fast to valley bottom. Reverse loading from north to south on ridge tops and open areas.

Avalanche Summary

Epic avalanche cycle through the forecasted region up to size 3.5. Most active at 2400m to 2600m (TL elevation). Expect the same carnage in the alpine but unable to confirm due to poor visability.

Confidence

Regions covered

Jasper