Bollettino valanghe

Moab

Utah Avalanche Center
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Pericolo valanghe

  • Alta quota
  • Limite del bosco
  • Sotto il limite del bosco
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Non aggiornato — questo bollettino è scaduto 7 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

The avalanche danger remains MODERATE and human triggered avalanches are possible. Steep, wind drifted slopes right around treeline and above that face N-NE-E are the most likely areas for you to trigger an avalanche up to 18" deep. A triggered wind slab has the potential to break into a buried persistent weak layer causing a deeper, and more dangerous avalanche. Persistent weak layers have been observed on slopes facing NW-N-S. A keen eye for wind loaded slopes, and a penchant for digging into the snow are essential skills to have before venturing into steep terrain.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2

    Wind drifts that developed during the week are becoming harder to trigger with each passing day but human triggered avalanches up to 18" deep remain possible. Most drifting has occurred right around treeline and above on slopes facing N-NE-E, but shifting wind directions and speeds have deposited snow in isolated areas on virtually all aspects, particularly at upper elevations. In some areas, triggered wind drifts have the potential to break into older, weak snow. Fresh drifts are recognizable by their smooth, rounded, or rippled appearance, and changes in snow depth along ridgelines can indicate areas of wind loading. Your best bet is to continue to avoid steep, wind drifted slopes.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2

    Spatial variability in the snowpack is the key phrase right now. Many areas have a deep and strong, underlying snowpack, while others have buried persistent weak layers that have come alive with the most recent snow load. Deep wind drifts are overlying loose, weak, buried surface snow on some northerly aspects. In addition, loose, sugary, faceted snow can be found in shallower, rocky areas just below treeline. And finally, I have observed a reactive, persistent weak layer on S-SE facing slopes. Though not unheard of, this is an uncommon concern. The only way to really know what is going on right now is to dig down and take a look.

Special Announcement

Are you looking to improve your avalanche skills? We are offering a Backcountry 101: Introduction to Avalanches class on February 15-16 in Moab. Click here to register A huge thanks to Moab Gear Trader for sponsoring this course. Please visit them for all your winter backcountry needs.

New UAC Podcast: The Art of Storytelling Through Film - A Conversation with Trent Meisenheimer check it out HERE.

Road Conditions: The road was plowed on Wednesday. Thank you Grand County!

Grooming report: Our dedicated groomer Matt Hebberd groomed the entire mountain on Friday.

Recent Activity

Some natural avalanche activity has occurred as a result of the new snow and winds though it has been isolated and spotty.

Storm snow avalanche in Talking Mountain Cirque on the night of Wed 21.

Wind slab release from a repeat running path in Tele Gold that also likely ran sometime the night of Wednesday, Jan 21.

Wind slab avalanche from the night of January, 22.

All three of these avalanches initiated on N-NE aspects in areas of very steep, rocky terrain. The second two described averaged about 18" in depth and broke into old snow.

Photos are of the 3 part slide that occurred from an increase in winds the night of January 22.

Snow and Weather

24 Hour Snow 0" Weekly Snow 10" Base Depth in Gold Basin 46" Wind NW 15-20 mph Temp 19F

Weather: Northwest winds overnight bumped up into the 15-20 mph range with gusts to 25. Today look for mostly sunny skies light WSW winds, and high temps near 30 degrees. In other words, a beautiful day in the mountains - definitely the place to be to get out of the valley fog. A weak system will move into the area tonight bringing a chance of snow through Monday with 1"-3" possible. Another weak system will brush by to the north on Wednesday.

Snowpack: Timeand warm temps have helped to strengthen the snowpack while also putting a crust on south-facing, sun-exposed slopes. Good riding and turning conditions can still be found in sheltered locations including some of the less wind-affected alpine areas. Avalanche conditions remain somewhat tricky with spatial variability being the key phrase. Deep drifts exist alongside wind-scoured areas while a surprising amount of terrain has been left untouched. In some areas, deep drifts are overlying shallow, weaker snow while in others, the underlying snowpack is relatively strong and deep. A keen eye for wind loaded slopes, and a penchant for digging into the snow are essential skills to have before venturing into steep terrain.

Travis Nauman and company were out yesterday and reported a wide variety of conditions with warm temps and a strong sun. See his observation for more details.

Wind, temperature, humidity on Pre Laurel Peak (11,700')

Storm totals at Gold Basin Study Plot (10,000').

Snotel site near Geyser Pass Trailhead (9600').

NWS weather forecast

General Announcements

My radio interview on KZMU about the history of backcountry skiing in the La Sals, avalanche accidents, and unique snowpack has been saved in perpetuity. You can listen to it here.

Check out the avalanche beacon training park at the Geyser Pass Trailhead and practice your rescue skills!

This forecast is from the U.S. Forest Service, which is solely responsible for its content. This forecast describes general avalanche conditions and local variations always occur.

Regioni coperte