Boletín de aludes

Provo

Utah Avalanche Center
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Peligro de aludes

  • Alta montaña
  • Límite del bosque
  • Bajo el límite del bosque
Desactualizado: este boletín caducó 4 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Expect changing avalanche conditions with rising danger as this warm wet storm moves through the Wasatch. The avalanche danger is CONSIDERABLE at high elevation slopes where winds are blowing the strongest and creating dangerous avalanche conditions.

The avalanche danger is MODERATE on all other slopes with a complicated mix of avalanche problems.

Problemas de aludes

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2

    There is a high level of uncertainty with the rain/snow line. As this freezing level fluctuates I wouldn't be surprised to hear of wet loose avalanches at mid and low elevation areas later in the afternoon. Temperatures hovering at or above freezing for the last 24 hours gives me cause for concern on how well this low elevation snowpack will handle this onslaught of rain. There may be places where it melts it out and the only change is rising creek levels.

    If I was traveling through rain soaked terrain I would avoid any location where I was sinking through the snowpack to the ground. These will be slow moving avalanches- but could pack enough of a punch to ruin your season.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    3

    Most avalanche activity on this persistent weak layer has been on northerly facing terrain. This layer DOES exist at other aspects and elevations and it could begin producing avalanches when it gets loaded by a series of storms this week.

    The places that are of most concern to me are the areas that had a stronger snowpack (extended column tests of with propagation in the high 20's). These are the slopes that will hold more water weight before they avalanche much wider and deeper. These will be unsurvivable avalanches. The uncertainty lies with how quickly or slowly we get new precipitation. Stay off of and out from under slopes over 30 degrees as the current snowpack adapts to the new snow.

    There is a higher rain/snow line in the Provo areas mountains and the potential for wet slab avalanches exists if rain percolates to the weak faceted snow.

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2

    Expect to see slabs of wind drifted snow building as snow falls today and the wind blows strong from the south and southwest. Winds are even moving some snow at mid elevations. I would avoid any steep wind drifted slope where you could trigger one of these wind slabs.

Snow and Weather

Under building clouds temperatures are in the mid to high 40's F. Winds are blowing southerly in the high 30's MPH gusting to the 50's MPH at the 9000' ridgelines.

Today, 10-16" of snow will fall with up to 1" of water by 5pm. This will be rain below 8000'. The rain and snow will be heavy at times. Temperatures will be 36-40 F. Winds will blow from the southwest 30 gusting to 45 MPH at the 9000' ridgelines and 35 gusting to 70 MPH at the 11,000' ridgelines.

The National Weather Service has issued a Winter Weather Advisory from 900am on Tuesday until 900am on Thursday.

This is the first in a series of three storms that are moving through Utah over the next week.

Additional Info

Check out this weather discussion that Trent had with Mike from the National Weather Service

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This information does not apply to developed ski areas or highways where avalanche control is normally done. This forecast is from the U.S.D.A. Forest Service, which is solely responsible for its content. This forecast describes general avalanche conditions and local variations always occur.

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