Lawinenlagebericht

Eastside Region

Eastern Sierra Avalanche Center
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Lawinengefahr

Fri
Hochgebirge
1 · Gering
Waldgrenze
2 · Mässig
Unterhalb
2 · Mässig
Veraltet — dieser Lagebericht ist 5 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

LOW avalanche hazard this morning is expected to rise to MODERATE as temperatures rise and surface snow begins to melt and human-triggered avalanches become possible. Be particularly cautious on long steep solar slopes, at lower elevations, and in areas near rock outcroppings, cliff bands, and tight couloirs where the effects of warming are amplified. Identify features of concern today and be on the lookout for areas of unstable moist snow.

Thank you to all who were able to join us for our final virtual education event of the 2020/21 season focusing on Springtime travel concerns. This event was recorded and is available to view on our YouTube channel!

Lawinenprobleme

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2

    Breezy conditions and clear skies led to a superficial surface refreeze last however, you can expect surface snow to soften quickly once the sun hits the snow. Gusty winds may slow the transition in the alpine particularly if speeds outperform the forecast, however full sun and temperatures well above seasonal averages will work together to raise the avalanche hazard throughout the day. Do your own localized assessments, monitor surface warming closely, and be ready to retreat if surface melt becomes concerning.

    Expect more easterly terrain to warm first followed by due south aspects and finally westerly aspects as the sun moves through the sky. Be particularly cautious in areas where the snow is still in a state of transition such as higher elevations and aspects with indirect sun.  Areas near rock outcroppings, cliff bands, and tight southerly facing couloirs where the effects of warming are amplified will also present elevated hazards. Wet, unconsolidated surface snow, rollerballs and pinwheels, and increasing boot penetration are all signs of surface warming and may foreshadow larger point release avalanches.

Avalanche Discussion

In addition to wet instabilities on solar aspects, Recent observations are highlighting thin coverage and punchy unconsolidated moist snow at lower elevations even on more shaded northerly aspects. Be on the lookout for reemerging obstacles such as fallen trees, rocks, and open creeks. Travel in this type of snow can be challenging. Move slowly and be kind to those knees! It will also be worth considering the potential of loose wet sloughs on steeper slopes on more northerly aspects that are not receiving direct sun, particularly at lower elevations.

An early start is always beneficial as the weather warms and the sun intensifies. Be aware of hazards that may reside above you and consider shifting to another objective if other parties are already above you. The transition from supportable and frozen to wet and unstable can happen very quickly. And even a small slough triggered high on a slope can grow quickly to a more concerning size as it travels down the slope. Monitor surface warming as you ascend and be ready to turn around if things become concerning. In addition, tools like tennis shoes, boot and/or ski crampons, and an ice ax may be crucial depending on where you choose to travel today.

Recent Observations

-4/7- McGee creek, surface warming in the Wine Glass couloir

-4/6-Lee Vining area- Solar warming on the east face of East peak, small loose wet avalanche

-4/6- June Lake Area- Solar warming in the Negatives

-4/6- Mammoth Area- Snowpit from Minaret vista

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