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 4 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Dangerous avalanche conditions exist and are expected to rise over the weekend.

The avalanche danger is CONSIDERABLE and human triggered avalanches are likely on all aspects at all elevations. Dense, heavy, and wind drifted snow has overloaded buried persistent weak layers creating dangerous conditions in the backcountry. On northerly aspects, human triggered avalanches up to 4' deep are likely. Backcountry travelers need to have excellent route finding skills, and know how to avoid being on or under slopes steeper than 30 degrees.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    3

    A persistent weak layer (PWL) of faceted snow that developed during the cold dry period in mid November exists on all aspects and elevation bands in the La Sal range. Dangerous avalanche conditions exist on any slope that harbors this buried PWL. In our travels yesterday, we continued to experience collapsing, and observed poor snowpack structure on southerly aspects. On northerly aspects, wind drifted snow has created additional stress, and human triggered avalanches up to 4' deep are likely. The snowpack is undergoing a severe test right now, and this process will continue into next week. Once this next load is applied, we'll have a better idea about the future of our snowpack. For now, all slopes steeper than 30 degrees should be avoided.

Special Announcement

Road Conditions: Grand County plowed yesterday but it's still kind of sporty and soft near the top. 4x4 with good tires recommended.

Grooming: LUNA will be up packing trails out today.

Recent Activity

In our travels yesterday we viewed many large avalanches on northerly aspects in Gold Basin that ran during the height of the storm cycle.

We also observed this somewhat anomalous avalanche that failed on a persistent weak layer on a SW aspect.

I'll update a complete list of avalanches in the La Sals soon.

Snow and Weather

24 Hour Snow T" 72 Hour Snow 13" Season Total Snow 99" Base Depth at Gold Basin 50"

Winds on Pre Laurel Peak SW 10-15 Temp 17F

Weather

A large storm system off the Gulf of Alaska will begin it's trek our way today. This will bring clouds, light to moderate WSW winds and a chance for snow today. The bulk of this system will be affecting points north but we could pick up a few inches of snow tonight. Saturday will remain cloudy with a chance for snow. The main event for our area kicks in Saturday night into Sunday as a low pressure system with good jet support moves in off the coast of southern California. A foot or more of new snow seems likely at this time. Stay tuned.

General Conditions

The mid-week storm dumped a heavy load of dense snow on our fragile snowpack. The dense snow makes for creamy riding and allows you to make turns on lower angle slopes which is good because it's dangerous out there. In our travels yesterday we observed lots of natural avalanche activity on northerly aspects and we continued to experience collapsing on south facing slopes where we also observed very poor snowpack structure. Charlie Ramser was also up yesterday and he observed similar conditions in the northern part of the range. The recent load load has re-awakened buried persistent weak layers down under and we have problems all the way around the compass. Blowing and drifting snow has added more stress to these weak layers on northerly aspects, ands deep and dangerous, human triggered avalanches up to 4' deep remain likely.

Snowpack and Weather Data

Gold Basin Storm Stake (10,000')

Gold Basin SNOTEL site (10,000')

SNOTEL site near Geyser Pass Winter Trailhead (9600')

Wind Station on Pre-Laurel Peak (11,400')

NWS forecast for the La Sal Mountains.

General Announcements

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. This forecast will be updated by 7:30 tomorrow morning.

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