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Avalanche Forecast

Archived

Mar 13th, 2013–Mar 14th, 2013

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Inland.

Confidence

Fair - Forecast snowfall amounts are uncertain on Thursday

Weather Forecast

Overnight and Thursday:  A cold front in the North is slowly sliding Southward bringing cooler temperatures and periods of moderate snow falls where the moist Pacific air meets the cold front. Expect moderate to strong Southerly winds and temperatures around -11.0 at the ridgetops.Friday: The Pacific moisture feed should end by late morning as the Low pressure system tracks Northward up the coast. Periods of moderate precipitation are expected where the moist air meets the cold front.Saturday: Unsettled weather is expected in the wake of the storm. Some broken skies or scattered cloud in the afternoon. Alpine temperatures around -10.0

Avalanche Summary

No new reports due to poor visibility.

Snowpack Summary

Some areas report some freezing rain to ridgetops. Strong Southwest winds are re-distributing new snow into wind slabs, and reverse loading areas that were stripped by recent Northwest winds. These wind slabs may be sitting above recently developed surface hoar and surface facets in area where they were not stripped by the wind. Strong solar radiation may have developed sun crusts on solar aspects up to about 2000 metres. The mid pack is reported to be well settled without any layers of concern. Depth hoar and facets are reported near the ground in areas with a thin snow pack.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.