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Skiers got surprised when this slab pulled out yesterday.  No one was caught or injured.  New snow and some wind-loading created instability that luckiy did not step down to deeper layers. Photo: Anonymous


Forecast link: GNFAC Avalanche Forecast for Tue Apr 1, 2014GNFAC Avalanche Forecast for Wed Apr 2, 2014GNFAC Avalanche Advisory for Thu Apr 3, 2014
Northern Madison, 2014-04-01
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    • GNFAC Avalanche Advisory for Sun Mar 30, 2014

    Snowpack and Avalanche Discussion

    Gallatin Range   Madison Range   Cooke City   

    Lionhead area near West Yellowstone  

    New snow and wind is the perfect recipe for avalanches. Yesterday, a large natural avalanche was observed on the north face of Mt Blackmore in the northern Gallatin Range. The slide broke 2-7 feet deep and hundreds of feet wide. It appears to be the result of a heavy wind load breaking on facets near the ground. This avalanche is a good example of what’s possible in the backcountry right now.

    This small wind slab near Mt Backmore in the northern Gallain Range was human triggered. Althoug small, it's an obvious sign of instability. This type of slide would be far more hazardous in steep, high consequence terran. Photo D Nicolls 


    Forecast link: GNFAC Avalanche Advisory for Sun Mar 30, 2014GNFAC Avalanche Forecast for Mon Mar 31, 2014
    Northern Gallatin, 2014-03-30
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    • This natural avalanche occurred on the north face of Mt Backmore. Heavy wind loading and weak facets near the ground was the recipe that caused this slide. The crown in the lookers left side of the photo is nearly seven feet deep. Avalanches of this nature will become more likely as more weight and stress is added to the snowpack. Photo B Bakken 


    Forecast link: GNFAC Avalanche Advisory for Sun Mar 30, 2014GNFAC Avalanche Forecast for Mon Mar 31, 2014GNFAC Avalanche Forecast for Tue Apr 1, 2014GNFAC Avalanche Forecast for Wed Apr 2, 2014GNFAC Avalanche Advisory for Thu Apr 3, 2014
    Northern Gallatin, 2014-03-29
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