Support the forecast! Support the forecast!

Give to Friends of the Chugach National Forest Avalanche Info Center.

Avalanche: Summit

Location: Road obs Summit Lake

Date:
Observer:
Route & General Observations

Strong ridgetop winds and active wind loading caused natural avalanche activity throughout Summit Lake zone. I observed an avalanche in motion on the NW face of Moose Mountain. See photo series below. Winds were from a Southerly direction, but also shifted at times from the West, both unusual wind directions for this area. Northern aspects appeared to have the most wind loading during the 2 hours I was in this zone. There were natural avalanches on North, West, and South aspects throughout Summit.

Avalanche Details
If this is an avalanche observation, click yes below and fill in the form as best as you can. If people were involved, please provide details.
Trigger NaturalAvalanche Type Unknown
Aspect NorthwestElevation 3500ft
Slope AngleunknownCrown Depthunknown
WidthunknownVertical Rununknown
Avalanche Details

Witnessed one natural avalanche triggered by active wind loading on Moose Mnt.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?No
Observer Comments

Numerous natural avalanches (D2 - D3) on:
Moose Mnt (NW and SW aspects)
Twin (W)
Lonestar (W)
Butch (W)
Tri-Tip (W)

Active wind loading on all ridges - very large plumes

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

Southerly winds that shifted at time (40s' gusting 60mph)
30F
4" new snow from overnight
Patches of sun

Photos & Video
Please upload photos below. Maximum of 5 megabytes per image. Click here for help on resizing images. If you are having trouble uploading please email images separately to staff.