Avalanche forecast

Logan

Utah Avalanche Center
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Avalanche danger

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Out of date — this forecast expired 2 years ago.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

Highlights

Areas of heightened avalanche conditions exist in the backcountry, with widespread buried weak snow plaguing upper-elevation slopes facing northwest through east. The danger is MODERATE, and people could trigger small slab avalanches of wind-drifted snow, 1 to 2 feet thick, on slopes steeper than 30°. There is still insufficient snow for avalanches on most slopes at lower elevations.

Evaluate snow and terrain carefully, especially in drifted upper-elevation terrain.

Avalanche problems

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely
    Size
    1

    Heavy snowfall and drifting earlier in the week overloaded slopes plagued by very weak, sugary, or faceted snow, elevating the avalanche danger.

    • Avalanches of wind-drifted snow are possible in drifted terrain where wind slabs have formed on slopes with poor snow structure. These could be 1 ' to 2' thick and perhaps 30 to 60 feet wide.
    • Some soft slab avalanches could step down into faceted snow near the ground.
    • Cracking and collapsing or "whumpfs" are red flags indicating unstable snow.
    • Although the likelihood diminishes with the stagnant weather, avalanches might still be triggered remotely or from a distance.

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

-Sign up for forecast region-specific text message alerts. You will receive messages about changing avalanche conditions, watches, and warnings...HERE.

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

-To report an avalanche or submit an observation from the backcountry, go HERE.

- Remember that the Tony Grove Road is not maintained for winter driving. Treacherous snow-covered and icy conditions will be encountered. 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.

Special Announcement

SAVE THE DATES!

Tuesday, December 3 - 21st Annual Pray for Snow fundraiser/party, Cache, Logan Information and tickets available here.

Wednesday, December 4 - USU KBYG (Know Before You Go) Night, USU ARC

Saturday, December 7 - 17th Annual Utah Snow and Avalanche Workshop (USAW) - Information and tickets available here.

Recent Activity

Observers this week reported triggering a few audible collapses or "whumpfs" in generally north-facing terrain above around 8000' in elevation. These triggered collapses indicate unstable snow.

Thanksgiving Day, Snowboarders or skiers triggered a small soft slab avalanche in west Miller Bowl. The small avalanche was about 20 feet wide and perhaps 7 inches deep.

Snow and Weather

Today, in the Logan Zone, people could trigger avalanches in the backcountry. Weak, sugary, or faceted snow from early November is widespread in upper-elevation terrain. Tuesday's snowfall probably overloaded some slopes with poor snow structure, causing elevated avalanche danger on upper-elevation slopes steeper than 30°. In exposed terrain, drifting built stiffer wind slabs on the underlying weak snow, and wind slab avalanches are possible. Although there may not be enough snow on many slopes to bury you, a ride over rocks in even a small avalanche could be quite dangerous.

  • The 8500' Tony Grove Snotel reports 18°F and 21 inches of total snow on the ground. It's 15°F at the 8800' UAC Card Canyon weather station, with 23 inches of total snow.
  • Currently at 9700' at the CSI Logan Peak weather station, it's 17°F and the wind is blowing from the southwest 31 mph, with gusts to 37 mph. At 9500' on UAC Paris Peak it's 12°F, and winds are from the west 22 to 29 mph.

  • Today, expect sunny skies, with 8500' high temperatures around 23°F and winds will blow from the west around 6 to 10 mph. Tonight, it will be mostly clear, temperatures will drop to around 13°F, and winds from the west will blow 7 mph.

    Tomorrow, it will be sunny. Expect high temperatures around 28°F and winds will blow from the west 6 to 8 mph.
  • A high-pressure system will continue to control the weather, and we can expect stable atmospheric conditions, fair weather in the mountains, and haze in the valleys for at least the next week.

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

Additional Info

I revisited the November 25, 1989 Mark Miller Accident in the PowerPoint presentation above.

The video is from last year, but the message is still good for the early season. Take the time now to check your companion rescue equipment and refresh your skills with backcountry partners...

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