Valanga

JFS Canyon - Running Rabbit Mountain

Adam ClarkFlathead Range & Glacier NP
Vedi sulla mappa

Quick report

Observed multiple hard slab avalanches that ran sometime in the previous 24 hours on the west face of Running Rabbit Mountain. Also two, D2 size wet loose events on the south face of Running Rabbit that ran 1500-2500 vertical feet. See avalanche tabs. No recent avalanches observed yet on more shady aspects at upper elevations. Thick fog kept me from viewing any distant upper elevation from West Glacier until I was just west of Essex. Wet loose avalanche and slab avalanche activity on the Canyon floor has mostly ended. The snowpack here appears to have adjusted to the warming and has begun draining water as it is rapidly melting.

Weather

Cloud Cover
few
Wind Loading
none
Recent Snowfall
0
Snow Avail For Transport
none

Daytime high temps reached 50 deg F on the Canyon floor and into the 40s up at 6000-7000 feet elevation

Avalanche

Size
D2.5 R3
Type
HS
Count
4
Aspect
W
Trigger
N
Elevation
7000 ft

3 separate hard slab avalanches, R2-4 and D2-3 in size, crowns 400-600' wide. Many details are estimated at this point. Hope to investigate more this week. This path threatens Highway 2. Debris terminated well above the highway. We suspect the failure layer was the FCs on top the late-Dec crust