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Archived

Avalanche Forecast

Jan 18th, 2014–Jan 19th, 2014
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

http://www.pc.gc.ca/apps/scond/Cond_E.asp?oID=15693&oPark=100205If the sun stays out this afternoon, avoid terrain facing the sun, especially if the surface gets moist.  Avalanches could be triggered around hot spots like rocks and trees.

Weather Forecast

A high pressure ridge will remain in place through the forecast period, with unseasonably warm temperature at high elevations forecast. Today, expect alpine temperatures around +2 deg and light ridge top winds.  Freezing levels will drop to valley bottom tonight, and rise tomorrow to 1300 m.  No precipitation is forecast for the next 3 days.

Snowpack Summary

Over 1m of new snow from the last week is settling. It sits on a surface hoar/graupel layer. Strong SW winds have formed slabs in exposed terrain at all elevations. Expect to find a solar crust on steep SW/W aspects and a supportive rain crust below 1300m. The mid pack is well settled with the Nov28 surface hoar layer down around 2m where present.

Avalanche Summary

No new avalanches observed yesterday along the highway corridor. Click on https://www.facebook.com/ParksMountainSafety to see images of the latest avalanche cycle this past Monday.

Confidence

Timing or intensity of solar radiation is uncertain on Saturday

Avalanche Problems

Wind Slabs

Strong winds formed wind slabs is exposed terrain at all aspects.  These wind slabs sit on a low density layer.  This layer could possibly be human triggered.  Be cautious in areas where even a small avalanche can have large consequences.
Be cautious as you transition into wind affected terrain.Watch for areas of hard wind slab in steep alpine features.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 3

Persistent Slabs

A weak layer buried down over 2 m will take a large trigger to fail. Limit your exposure to cornices.  A cornice fall to could be just the right trigger to fail this weak layer.
Extra caution needed around cornices with current conditions.Be aware of the potential for large, deep avalanches due to the presence of buried surface hoar.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 3 - 4