Bollettino valanghe

East Slopes North

Northwest Avalanche Center
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Pericolo valanghe

Fri
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 5 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

A warm temperature trend will continue for Thursday, so expect wet loose avalanches to become problematic during the day. Look for rollerballs, wet punchy snow, and recent wet avalanches as indicators that you could trigger them. Use caution on, or move away from slopes steeper than 35 degrees when you notice these signs of instability.

Problemi valanghivi

  • Loose Wet

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

    A second day of very warm temperatures will keep wet loose avalanche activity going. Sunshine and warm temperatures will quickly melt snow surfaces on Thursday. Expect that these may become problematic as the daytime warms. Look for indicators of wet activity such as moist surface snow, rollerballs, and recent fan-shaped avalanches. Once you notice these, or if you begin to sink into wet snow deeper than your boot top, its time to get off of steep slopes. The potential size of loose wet slides will increase where you find more recent snow, especially further west in the zone. While loose avalanches are predictable, they may grow larger and could be dangerous in consequential terrain and near terrain traps. 

    Directly north facing slopes at upper elevations may stay cooler, although temperatures should be warm enough that we could see wet slides occur even on shaded slopes below treeline (see photo).

    Cornices may be reactive to the weight of a person after prolonged sun and warming temperatures, especially in areas where they are recently formed. Give them plenty of room when traveling on ridges and stay out from underneath them. 

    (3/31/2021) A wet loose avalanche (D1.5) off northeast facing terrain in adjacent East Central zone.

Avalanche Discussion

Thursday looks to be another very warm day. Overnight temperatures won't cool off all that much, so refreezes of snow surfaces should be weak. This will allow the snow to warm up more quickly on Thursday, and continued wet loose avalanche activity is expected. On Tuesday and Wednesday, the sun hit many slopes for the first time after around a foot of snow fell at Washington Pass. We have uncertainty, and minimal information on the reactivity of lingering wind slabs that were likely created with Sunday's storm.

Since the beginning of March, the region has undergone a slow warming trend. Observers have reported sporadic cornice fall. The lower snowpack is generally well settled in the zone.

Regioni coperte