GNFAC Avalanche Advisory for Sun Mar 26, 2017
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
Natural loose snow avalanches in the northern Bridger Range after 4-6" of new snow fell. These slides began near rocky outcrops and grew large as they entrained dense new snow. Photo: G. Antonioli
Loose snow avalanches in the northern Bridger Range ran naturally after 4-6" of dense snow fell on Saturday (3/25). Photo: G. Antonioli
Loose snow avalanches in the northern Bridger Range ran naturally after 4-6" of dense snow fell on Saturday (3/25). Photo: G. Antonioli
This slide started as a point release and gouged out weak, wet snow to the ground. It likely occurred on Thursday (3/23). Photo: A. Pohl
Forecast link: GNFAC Avalanche Advisory for Sun Mar 26, 2017
This large wet slide in Beehive Basin was the result of above freezing temperatures, strong solar input and isothermal snow. The slide started as a point release high in the rocks and soon gouged to the ground. A full isothermal snowpack now exists up to 9,000 ft. which will make this type of avalanche more common once it warms up. Photo GNFAC
GNFAC Avalanche Forecast for Sat Mar 25, 2017
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
GNFAC Avalanche Advisory for Fri Mar 24, 2017
Bridger Range Madison Range Gallatin Range Lionhead area near West Yellowstone Cooke City
It’s not snowing but at least it cooled off. Below freezing temperatures overnight combined with clear skies will produce a firm and locked up snowpack during the first half of the day. On all but high north facing slopes, a solid curst will exist on the snow surface creating stable conditions.
Skiers outside of Cooke City observed these dry slab avalanches in the north bowl of Abiathar. A layer of graupel is the expected weak layer. This avalanche problem won't be widespread, but it's something to consider when skiing or riding around Cooke City. Photo B. Fredlund
GNFAC Avalanche Advisory for Thu Mar 23, 2017
It’s a choose your own adventure type of day. Dry snow still exists on high north facing slopes while spring corn conditions can be found if timed right on south facing and lower elevation terrain.