Lawinenlagebericht

Northwest Inland

Apr 10 – 11, 2016Avalanche Canada
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Lawinengefahr

Tue
Wed
Hochgebirge
Keine Stufe
Waldgrenze
Keine Stufe
Unterhalb
Keine Stufe
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Kernpunkte

Spring conditions typically means hazards are greatest during the heat of the afternoon. Start early and finish early.

Lawinenprobleme

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    2–5
    The timing of failures is unpredictable. Unsupported sections are extra suspicious. Dropping chunks are a hazard in themselves and they may also trigger a slab avalanche on the slopes below. Watch and limit your exposure to overhead hazards.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1–3
    Loose wet sluffing is possible on sun exposed slopes with sunshine or warm afternoon temperatures. The intensity of the sun and warmth directly effects he size and length; wet slabs are also possible, especially at lower elevations.

Weather Forecast

Expect skies to cloud over on Monday as a weak disturbance arrives overnight Monday. It's a "cold front" so temperatures will cool and freezing level to lower -- looks like freezing level should hover between 100m and 1500m through Wednesday. It's a weak disturbance so only a few millimeters of precipitation is expected unless some localized convective cell happens to form over your valley in which case there might be 10cm of snow at high elevations. A mix of sun & clouds is the general pattern.

Avalanche Summary

With the arrival of spring, field observations and data are very limited in the region. No new avalanche reports does not mean avalanches are not occurring. One should expect cornices to continue to fail, at times triggering avalanches on the slopes below. Similarly, one must expect solar radiation and warm temperatures to weaken the snowpack, triggering loose wet and possibly wet slab avalanches.

Snowpack Summary

Moist or wet snow exists on all aspects at all elevations. Any surface crusts that form overnight will quickly break down during the day. The snowpack's strength is directly related to the thickness and strength of these crusts. Where there are layers in the snowpack, they are generally bonding. A widespread crust/facet layer from early February and depth hoar at the bottom of the snowpack (primarily in northerly & inland areas) are dormant. Strong, thick crusts in the upper parts of the snowpack have limited the reactivity of these old layers; however, they could potentially once again produce isolated yet large avalanches with prolonged periods of warming.

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