CNFAIC LogoCNFAIC Logo

Observations

Region: Turnagain
Location: Road Obs- Turnagain Pass
Observer:
Date:

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.

Avalanche Details

Avalanche details

Trigger UnknownAvalanche Type Soft SlabAspect Northwest
Elevation 2500ftSlope AngleunknownCrown Depthunknown
Width 250ftLength 250ft  

Observer Comments

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.

Red Flags

Obvious signs of instability

Recent Avalanches?YesCollapsing (Whumphing)?YesCracking (Shooting cracks)?Yes

Observer Comments

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.

Weather

Weather

Overcast with scattered snow showers above 1000' and rain showers below
32F along the Seward Hwy at 4pm
Light winds

Snow Characteristics

Snowpack

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"

Photos & Video

Photos



USFS SNOW AND AVALANCHE HOTLINE (907) 754-2369
If you have comments or questions regarding CNFAIC operations or winter recreation management, please email staff@chugachavalanche.org
© 2019 Chugach National Forest Avalanche Information Center. All rights reserved.
FCNFAIC
Donate
If you think a public avalanche
center is important then we urge
you to become a member & donate.


PickClickGive