Lawinenlagebericht

Eastside Region

Eastern Sierra Avalanche Center
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Lawinengefahr

Sat
Hochgebirge
1 · Gering
Waldgrenze
1 · Gering
Unterhalb
1 · Gering
Veraltet — dieser Lagebericht ist 6 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

LOW danger exists at all elevations today. Be on the lookout for lingering wind slabs on all aspects above treeline today, particularly on unsupported slopes and in extreme terrain.  Generally, safe avalanche conditions exist but LOW danger does not mean NO danger. Be on the lookout for isolated areas of unstable snow and remain cognizant of the variable surface conditions. Expect the avalanche danger to rise along with the size and distribution of sensitive wind slabs if precipitation totals outperform the forecast today.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely
    Größe
    1

    A seemingly constant barrage of extreme wind events has left the eastern sierra with a wide variety of hard wind-affected surfaces and very little soft snow available for transport. Winds are expected to remain within transportable speeds today, but we do not expect substantial slab development. It does however remain important for the backcountry enthusiast to continue and evaluate suspect terrain carefully. Fresh and sensitive wind slabs may exist in isolated areas in the forecast area. Exposed areas and leeward catchment zones near and above treeline deserve evaluation. This is particularly true on unsupported alpine slopes, the sidewalls of alpine couloirs, and in extreme terrain.  Large drifts, recent cornice growth, and uneven snow surfaces are all clues that indicate nearby wind deposits. Do your own localized assessments and be suspect of terrain features that encourage drifting such as the leeward sides of ridgelines, gully features, and cross-loaded depressions

Avalanche Discussion

It will be important to make your own observations today if you head out to the backcountry. This is especially true if the spigot turns on and we receive any measurable precipitation. In that case, we can expect the avalanche danger to rise quickly. In addition, variable surface conditions remain a challenge. Be ready for fast, hard, and slick conditions in many exposed areas, and breakable crusts in many others. Equipment such as a helmet,  boot or ski crampons, and an ice ax are advisable depending on your chosen adventure.

Recent Observations

 

02/18- Mammoth Area- Wind transport, surface conditions, and large facets in the lakes basin

02/17- Virginia lakes- wind transport, near-surface faceting, and propagating test results

02/17- Mammoth Area- Wind transport, variable surfaces on the crest

02/17- McGee Creek- Challenging surface conditions, wind transport, wine glass couloir

02/17- Bishop Area- thin coverage, variable surface conditions, high elevation wind transport

 

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