|Location:||Road Obs- Turnagain Pass|
Route & General Observations
Drove through Turnagain Pass around 11am to Summit Lake. Returned from Summit Lake through Turnagain Pass around 3:30pm and then drove through Portage Valley. Saw a new crown on the NW shoulder of Sunburst, that occurred mid-day and was likely remotely triggered from the skin track on the ridge. It was shallow, but had wide propagation. See photo below. “Whumpfing” in and around the alders below Seattle Ridge and a small pocket, 2′ deep avalanched and was reported by a snowmachiner. Numerous natural avalanches occurred mid/late storm in very steep channeled terrain. Indicator Path across the Turnagain Arm, Five Sisters in Portage Valley, both of these all ran to sea level. The West face of Moose Mountain also had new debris in several steep chutes.
|Trigger||Unknown||Avalanche Type||Soft Slab||Aspect||Northwest|
|Elevation||2500ft||Slope Angle||unknown||Crown Depth||unknown|
This avalanche occurred sometime between 11am today and mid-day when it was noticed. The skin track goes along the ridge behind it, which makes it very likely that this was remotely triggered.
Obvious signs of instability
|Recent Avalanches?||Yes||Collapsing (Whumphing)?||Yes||Cracking (Shooting cracks)?||Yes|
Avalanche NW shoulder of Sunburst- see details above
Wumpfing was reported in Turnagain Pass by a snowmachiner riding near alders
Cracking was observed today on Tenderfoot
Natural activity that occurred some time mid-storm including debris in numerous steep chanelled paths seen from the Seward Hwy, and Portage Rd. The largest ones were Indicator Path across Turnagain Arm and Five Sisters in Portage that ran close to sea level.
Overcast with scattered snow showers above 1000' and rain showers below
32F along the Seward Hwy at 4pm
Observed depths of recent storm snow (12/24-12/26)
Turnagain Pass Motorized lot ~ 2'
Turnagain Pass Sunburst lot ~ 1.5'
Johnson Pass N trail head ~6"
Summit Lake Lodge ~4"
Portage - Rain
Upper Crow Creek Road ~3"