Avalanche forecast

Ogden

Utah Avalanche Center
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Avalanche danger

  • Alpine
  • Treeline
  • Below treeline
Out of date — this forecast expired 2 years ago. You’re viewing past conditions, not the current bulletin.

Highlights

This morning, we have a MODERATE avalanche danger on many steep slopes for triggering existing and developing soft and hard slabs of wind drifted snow. These drifts will be most pronounced on northwest to north to southeast facing slopes of the mid and upper elevations. In very isolated northwest to east facing terrain, these may also step down into older faceted snow near the ground.

HEADS UP! The danger may reach CONSIDERABLE in some areas by the afternoon and likely HIGH danger overnight.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    2

    The moderate to strong winds will continue to transport the existing and falling snow into unstable slabs in lee terrain...and these will get bigger and more sensitive by the afternoon. These will be particularly sensitive as they will break on very low density and/or recrystallized snow on the surface. These soft slabs (and occasional hard slabs) may be triggered at a distance. Cracking and collapsing are telltale signs of unstable snow. Note that the locator rose shows where you are most likely to find these unstable wind slabs but be warned that weak, low density snow exists on the surface of many aspects (even some solar aspects) and strong, swirling winds have a habit of loading and crossloading snow onto many aspects. Cornices will also become increasingly tender with the new snow and wind.

    TREND: Rapidly increasing.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2

    The snowpack is complex for this time of year, with up to two buried weak layers, one from early season and another from late January. The most suspect slopes will be those that have already avalanched—known as repeaters—and are continuing to reload.

    TREND: Slightly increasing and something to watch over next 48 hours.

Special Announcement

  • A preliminary report on Saturday’s avalanche fatality in the East Bowl of Silver Fork can be found [HERE].

  • The full report on the February 3rd avalanche fatality on Monte Cristo (Ogden Mountains) is published [HERE].
  • The accident report detailing the full and partial burial close call in Dutch Draw (Park City ridgeline) from Saturday is available [HERE].

Recent Activity

No new avalanches were reported in the Ogden backcountry yesterday, but ski area avalanche teams reported triggering shallow wind slabs in standard lee terrain.

Observations and Avalanches

Snow and Weather

Skies are partly cloudy. Temps are in the single digits to low teens, thankfully well above yesterday's temps well below zero. Winds are moderate to strong from the southwest.

Our partners at the National Weather Service have issued a Winter Storm Warning for most of the mountainous terrain across the state through at least the early part of the weekend. In their discussion, they write, "One of the most significant mountain snow storms of the season is on tap for the short term forecast period...with many locations measuring in feet or even a yard stick by sunset on Saturday." I couldn't agree more.

Snowfall should begin by midday and last through late Saturday where we'll measure the snowfall in feet and not inches. The storm should provide a fairly even blanket across northern Utah with the northern, central and southern Wasatch all seeing their fair share. Winds will steadily increase to strong from the southwest today and temperatures will rise into the mid-20s. The bulk of the precipitation will come in on a southwest to westerly flow, aided by a moisture tap from the Pacific. Colder temps follow for Saturday. Active weather continues for late weekend into early next week.

Happy Valentine's Day.

General Announcements

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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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