Lawinenlagebericht

Logan

Utah Avalanche Center
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Lawinengefahr

  • Hochgebirge
  • Waldgrenze
  • Unterhalb der Waldgrenze
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Veraltet — dieser Lagebericht ist last year abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Heightened avalanche conditions exist in the backcountry, and people could trigger avalanches of wind drifted snow on upper and mid-elevation slopes steeper than 30 degrees. There are areas with CONSIDERABLE danger in drifted upper elevation terrain on slopes facing northwest through southeast where people are likely to trigger soft wind slabs up to around 1 foot deep.

Make conservative choices, and evaluate snow and terrain carefully. Avoid steep drifted slopes and stay well away from and out from under overhanging cornices.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    2

    Drifting by strong winds blowing from the south-southwest deposited obvious stiff wind slabs in upper elevation terrain, but yesterday's snow accumulations likely hid these from view. Overnight winds shifted from the west-northwest and easily formed new soft wind slabs in exposed upper elevation terrain. Winds from the west-northwest increased significantly overnight in the northern part of the zone, particularly in the Bear Lake area, with the wind sensor on Paris Peak showing 30 to 40 mph winds. Despite new snow accumulations of only a few inches, expect to find sensitive new wind slabs around a foot deep in exposed upper elevation terrain.

    • Watch for and avoid stiffer wind drifted snow on the lee side of major ridges, below cornices, and in and around terrain features like cliff bands, sub-ridges, and gully walls.
    • Wind slabs appear smooth, chalky, and rounded, and they can sound hollow, like a drum, when you move around on them.
    • Cracking is a red flag indicating unstable snow.
    • Hard wind slabs sometimes let you get out on them before releasing suddenly. Freshly formed, softer wind slabs are often very easily triggered, sometimes remotely (or from a distance).
    • People should stay off of, out from under, and well away from large overhanging cornices, which are deceptive and often break much further back than expected. Natural cornice falls are possible, and these could trigger avalanches on slopes beneath.

  • Storm Slabs

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

    Small storm slabs and wet or dry loose avalanches of new snow are possible on steep slopes, and some of these could run pretty fast and far on a slick or partially refrozen melt-freeze crust... Small avalanches of new snow are generally manageable, unless you are caught and carried into trees or other terrain traps below steep slopes.

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Recent Activity

  • We are very sad to report a fatal avalanche accident occurred on Friday, March 7 in the Western Uinta Mountains near Kamas. Preliminary accident report is HERE
  • Wet avalanches were common in the Logan Zone last weekend and earlier this week, but no avalanche incidents were reported recently.

Read about all avalanches and observations HERE.

Snow and Weather

The storm underperformed in the Logan Zone, with 4 inches at Tony Grove and a little more than 5 inches at Card Canyon. Yesterday's obvious hard wind slabs built by strong south winds are now hidden by a few inches of new snow. Overnight drifting by winds blowing from the west-northwest easily created new soft wind slabs on the lee sides of major ridges and in and around upper elevation terrain features. People could likely trigger soft wind slabs of fresh snow up to about 1 foot deep in drifted upper elevation terrain.

Low elevation slopes facing the south half of the compass were bare of snow or had only very shallow snow cover before yesterday's storm, and only a couple inches of new snow accumulated on them. The snow was still saturated and soft yesterday in low northerly facing and mid elevation terrain, and shallow wet or dry loose avalanches (or sluffs) running on partially refrozen or a crusty older snow surface are possible.

The Tony Grove Snotel at 8400 feet reports 4 inches of new snow with .5" SWE. It's 19° F, with 92 inches of total snow. It's 14° F at the Card Canyon weather station with 5.2 inches of new snow and 71 inches of total snow. At 9700 feet at CSI's Logan Peak Wx station, winds are blowing 22 to 30 mph from the northwest, and it's 11° F. The winds increased overnight on Paris Peak at 9500 feet, where it's 10° F, with winds blowing 25 to 42 mph from the west-northwest.

It will be partly sunny in the mountains today, with a high temperature at 8500 feet near 34° F. The wind will blow from the south-southeast 6 to 10 mph and will shift from west southwest in the afternoon. Some snow is possible in the afternoon, but not much in the way of accumulation is expected. Tonight, skies will be mostly cloudy and some snowfall is possible, with a low temperature around 20° F. Winds from the southwest will be 5 to 7 mph, becoming calm in the evening. It will snow tomorrow, with 2 to 4 inches of accumulation likely. High temperatures are expected to be near 35° F, with winds shifting from the west and blowing 8 to 13 mph in the morning.

The active weather pattern looks to continue for much of the upcoming week, with another cold front impacting the zone Monday night and Tuesday.

For more information, visit the UAC weather page here: Weather - Utah Avalanche Center

For Logan-specific weather, go here: Logan Mountain Weather - Utah Avalanche Center

General Announcements

-National Forest Winter Recreation Travel Maps show where it's open to ride: UWCNF Logan, Ogden LRD Tony Grove, Franklin Basin CTNF Montpelier

-For all questions on forecasts, education, Know Before You Go, events, online purchases, or fundraising, call 801-365-5522.

-Remember the information you provide could save lives, especially if you see or trigger an avalanche. To report an avalanche or submit an observation from the backcountry, go HERE.

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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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