Bulletin d’avalanche

Mt Hood

Feb 25 – 26, 2015Northwest Avalanche Center
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Archivé · expiré 12 years ago

Danger d’avalanche

Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

Shallow storm and wind slabs are possible Thursday primarily on lee slopes above treeline. 

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1
  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1

Detailed Forecast

A few inches of new snow may accumulate above 4500-5000 feet Wednesday night through Thursday afternoon on Mt. Hood. The new snow along with a slight warming trend Thursday afternoon may make for locally unstable and shallow storm and wind slabs, especially on lee slopes above treeline.  

Watch for new snow bonding poorly to the old snow surface; likely a variety of surface crusts and older wind transported snow. 

Due to the low snowpack, especially below treeline, watch for terrain hazards such as open creeks, partially covered rocks and vegetation. Many areas below treeline do not have enough snow (new or existing) to pose an avalanche hazard. 

Snowpack Discussion

Since the wet start to February, fair weather through mid-February has led to generally thick surface crusts, as well as further deterioration of the snow cover below treeline.

Weak weather disturbances passed through in NW flow aloft Thursday and Friday, bringing an inch or two of new snow near and above treeline for Mt. Hood. Mt. Hood Meadows pro-patrol reported Sunday morning that although E-NE winds were strong, there was minimal snow available to build new wind slab. 

Generally low avalanche danger along with fair and mild weather has been observed mid-week. 

The mid and lower snowpack at Mt Hood snow consist of layers of stable consolidated rounded grains or melt forms and crusts from multiple warm periods this winter.

Régions couvertes