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Archived

Avalanche Forecast

Mar 16th, 2019–Mar 17th, 2019
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
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

Keep a heads up for increased avalanche activity on solar aspects if the sun pokes out today! Pockets of windslab may exist on northerly aspects in the alpine.

Weather Forecast

Cloudy with sunny periods today with no precipitation and light winds from the west. The alpine is forecast to reach a high of -4C with freezing level rising to 1800 m. Today will mark the beginning of a significant warming trend that will continue into next week, where freezing levels are forecast to skyrocket to near 3200m by Wednesday.

Snowpack Summary

On solar aspects, sun crusts are buried 15cm and 50cm and are several centimeters thick. Moderate southerly winds have redistributed the recent 50-60 cm of storm snow, which sits on a sun crust on solar aspects, hard slab in exposed areas, and facets in sheltered locations.

Avalanche Summary

Solar input triggered dry loose avalanches from steep slopes to size 2.0 yesterday. Some of these loose avalanches initiated small slabs. On Wed, a human-triggered size 1.5 avalanche on Glacier Crest took 2 people for a short ride on a W aspect at 2100m.

Confidence

Avalanche Problems

Loose Dry

Expect new snow to sluff easily and keep in mind that it's sitting on up to 50cm of snow from earlier this week that could also get moving with it! Natural avalanches are possible on solar aspects if the sun comes out.
Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.Recent snow may be more sensitive to human triggering on solar aspects where it sits on sun crust

Aspects: East, South East, South, South West, West.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2

Persistent Slabs

At treeline and above the recent snow has settled into a soft slab that is up to 50cm deep and is bonding poorly in areas where it sits on weak, faceted snow or on a sun crust.
Use caution in lee and cross-loaded terrain near ridge crests.Convex features and steep unsupported slopes will be most prone to triggering.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5