Avalanche forecast

Central Sierra Nevada

Sierra Avalanche Center
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Avalanche danger

Alpine
1 · Low
Treeline
1 · Low
Below
1 · Low
Out of date — this forecast expired 7 years ago. You’re viewing past conditions, not the current bulletin.

Highlights

Well above average temperatures will allow for loose wet instabilities to form as daytime warming occurs today.  Firm snow conditions continue with potential fall hazards possible.  LOW avalanche danger exists.

Avalanche problems

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1

    Clear overnight skies along with below freezing temperatures has provided a good refreeze to the snow surface.  On SE-S-SW aspects, strong and thick melt freeze crusts exist that should allow for good corn snow conditions through the late morning hours.  As rapid warming occurs with well above average temperatures, loose wet instabilities will become possible on E-SE-S-SW-W aspects at all elevations.  Most loose wet instabilities should be in the form of roller balls and pinwheels.  Where transitional snow exists that has not seen repeated melt freeze cycles, especially on E and W aspects, these areas could allow for more snow to be entrained with larger loose wet avalanches possible.

    NW-N-NE aspects are expected to remain firm and variable today with limited amounts of softening expected.  Firm surfaces with potential fall hazards continue to exist throughout the backcountry.  NE winds may delay some snow surface softening in wind exposed locations, but in general, softening is expected to occur sooner than what has been experienced over the past couple weeks.  Small loose wet avalanches could have increased consequences where low snow conditions exist with obstacles and hazards.  Make sure your group comes up with a plan that is appropriate for the current conditions.       

Avalanche Discussion

Observations were received from Round Top in the Carson Pass area, and Rose Knob in the Mt. Rose area.  About an inch of new snow fell in the southern part of the Carson Pass area on Saturday which gave a little refresh to the current conditions on northerly aspects.  Southerly aspects provided good consolidated corn snow with waning snow coverage.  On Rose Knob, corn snow existed on SE/S aspects around mid-day.  Punchy transitional snow was found on E aspects, with firm and variable snow still on northerly aspects.  Snow coverage is deteriorating quickly in this area with many obstacles and hazards below 8000'.

Regions covered