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GNFAC Avalanche Advisory for Sun Jan 15, 2012

Snowpack and Avalanche Discussion

 The Bridger, Madison and Gallatin Ranges, the Lionhead area near West Yellowstone, and the mountains around Cooke City:

Today, triggering an avalanche will be like the Giants beating the Packers – it’s not highly likely but it is possible.  Can you put a number – 1 in 10, 1 in 100, 1 in 1000 – on your odds of triggering a slide? No. But there are a few simple decisions that can be made to help stack the odds in your favor and keep the chances of triggering a slide to a minimum. 

This snowpit in the Cabin Creek area of the Southern Madison Range has a total snowpack depth of almost 4 feet.  The bottom 2 feet is all weak, sugary facets and the upper 2 feet is a slab.  See the complete snow profile graph here.   Photo: B. Radecky

 

Southern Madison, 2012-01-14

 Variable snow conditions exist around Buck Ridge.  Some slopes are comprised almost entirely of weak faceted snow.  These slops lack a slab and therefore are currently stabel, but once more snow falls they will become unstable very quickly.

Northern Madison, 2012-01-13