Bollettino valanghe

Mount Shasta

Mount Shasta Avalanche Center
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Pericolo valanghe

Sun
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 8 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

The forecast area will see a brief lull in weather before another storm arrives tonight. Heightened avalanche conditions exist above treeline on many leeward aspects where wind has deposited snow. Use caution around terrain features that promote drifting, and carefully evaluate the snowpack before entering avalanche terrain. Stick to wind-protected areas to reduce your exposure. Slick windward slopes and early-season conditions present additional hazards—travel slowly and cautiously to avoid injury from buried objects. 

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

     A chance exists of triggering a large wind slab avalanche above treeline on leeward north, east, and south aspects. Wind-deposited snow will be most reactive just below ridgelines, on mid-slope moraines, around rock outcropings, and along the upper margins of bowls. Wind slabs often appear dune-shaped or pillow-like, and may consist of soft or hard snow. Cracking or blocking within the new snow are clear signs of instability. Watch for actively blowing snow, newly formed wind lips, and cornices, which indicate areas to avoid.

    Winds on Mount Shasta can behave oddly and unpredictably. Observations above treeline have been limited. The depths and reactivity of wind slabs have not been verified. If you choose to travel in the alpine, be prepared to self-evaluate conditions. The potential for avalanche danger will increase over the afternoon hours as strong winds and precipitation re-enter the region.  

    A recent observation yesterday from a hike on Green Butte Ridge found a foot of heavy, wet snow at 8,200 feet that was well bonded and displayed no signs of wind effect.

    A foot of snow on a SE aspect at 8,200 feet 

    Photo: Eric Falconer

Avalanche Discussion

Big thanks to everyone who attended the movie last night! Great turn out and we are eternaly grateful. 

Mount Shasta has begun to build a snowpack near and below treeline. However, it’s still very unfriendly and unusable for recreation.  A usable snowpack exists at approximately 9,000 feet on Mount Shasta. As winter makes a comeback, increased avalanche danger is likely to remain present. It will be vital not to get complacent and acknowledge the danger associated with large storm events. 

For now, the Eddy Mountains, Castle Lake area, Pilgrim Creek and Deer Mountain Snowmobile Parks, Mount Shasta Nordic Center, and Snowman’s Hill don't have a usable snowpack. 

A final reminder for anyone adventuring onto the mountain: wet, misty, warm storms like we are seeing can wrap the mountain in an icy glaze. We want to underscore the importance of proper equipment, training and experience for safe travel. Please be careful.

Regioni coperte