Bollettino valanghe

Eastside Region

Eastern Sierra Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Wed
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Open full map
Non aggiornato — questo bollettino è scaduto 4 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Strong west winds and isolated snow showers will contribute to increasing wind slab hazard today. Human triggered avalanches are likely in steep leeward terrain today. Though most will be small, staying out of wind-loaded terrain is the safest way to avoid getting caught in a slide large enough to bury you.

Problemi valanghivi

  • Wind Slabs

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

    West southwest winds began to increase and transport snow into east and northeast terrain yesterday afternoon. Overnight winds reached up to 80 mph in the alpine and strong wind speeds were recorded at stations below treeline. Winds will shift from the west to the northwest over the course of the day giving a wider distribution to the wind slab problem. Plumes of blowing snow yesterday indicate that there is still snow available for transport in windward fetches. The possibility of light snowfall today will give an additional input of snow available for transport. You are most likely to find wind slabs on the leeward sides of ridges, cross-loaded gullies, and downwind of convexities and trees. Pay attention to blowing snow, rounded and textured drifts, and cracking as clues that wind slabs may still be sensitive. Even a relatively small avalanche can have elevated consequences above terrain traps or in complex terrain.

    (2/13/2023)

    Large natural avalanche caused by drifting snow in sheltered leeward terrain below cliff bands. Likely a natural release on 2/11/23.

Avalanche Discussion

Yesterday we had a report of a small skier-triggered wind slab on a steep north-facing slope above treeline. The reporting party noted that the wind slab formed while they were climbing and descending the line. As we continue to build slabs throughtout the day today keep in mind this early indication that these new slabs are likely sensitive to human triggers. Though human triggerd avalanches are likely, the Danger level has been held at Moderate (level 2) because the average expected size is small. It is important to note that large avalanches are still possible in isolated areas today.

Keep the fundamentals in mind, recent avalanche activity and increasing blowing snow are the two red flags that stand out.

Winds will create additional non-avalanche hazards as well. Widespread blowing snow may decrease visibility and make communication and navigation difficult near and above treeline. It is a good idea  to carry extra warm layers and equipment to build an emergency shelter if traveling in the mountains today.

Regioni coperte