Surprising large naturals above Red Meadow Lake

The Northern Whitefish Range has reported the most snow from the recent storm so we went searching for dangerous avalanche problems around Red Meadow.  Despite relatively benign weather today and lack of signs of instability in our tests and observations, we observed 2 large naturals that ran in the afternoon off of Red Mountain. 

• Settled storm totals are ~10" to 16" over recent rain and sun crusts, with signs of light previous wind drifting.   The snow remains relatively cohesionless.  
• We performed ski and snowmobile slope cuts on numerous steep rollovers to 40* with no results except minor sluffing in the top few inches. We could not produce any cracking or other obvious signs of instability.  Column tests and hand shear tests did not produce results.
• Winds were calm up to 6,500' and appeared to be minimal at ridgetop, temperatures remained cool, and snowfall was generally light with a brief pulse of heavy snow around noon.
• Two large (D2) natural avalanches ran in the afternoon around the same time.  One was a storm slab that looks like it was triggered by a sluff from above. We couldn't see the start zone of the other.  We investigated the crown of the former, which was ~40 cm, fist hard slab that failed on the most recent rain crust. 
• We had good views of other paths along Red Meadow Road and saw no other recent avalanche activity apart from small sluffs