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Avalanche Forecast

Archived

Apr 13th, 2013–Apr 14th, 2013

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

Regions

South Rockies.

Due to a lack of information sources at this time of year, this forecast is based primarily on weather data. If you have been traveling in the backcountry recently, send us your observations. Email us at [email protected]

Confidence

Poor - Due to limited field observations for the entire period

Weather Forecast

Sunday and Monday: An upper trough of low pressure brings unsettled weather. Isolated snow showers and broken skies are expected. Winds light to moderate from the northwest and freezing levels 500-1000m.Tuesday: An Upper ridge of high pressure builds bringing generally dry conditions. Freezing level 1200-1500m.

Avalanche Summary

Recent reports indicate loose snow avalanches to size 1.5 running out of steep rocky terrain and 20-30cm thick slab avalanches running to size 2 in crossloaded features at treeline and above.

Snowpack Summary

20-30cm of new snow sits on a variety of surfaces. Overnight freezing has consolidated previously loose wet snow at treeline and below. Recent moderate winds may have developed windslabs at upper elevations. 

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.