|Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
|Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
|Dangerous avalanche conditions. Careful snowpack evaluation, cautious route-finding, and conservative decision-making essential.
|Very dangerous avalanche conditions. Travel in avalanche terrain not recommended.
|Extraordinarily dangerous avalanche conditions. Avoid all avalanche terrain.
|Likelihood of Avalanches
|Natural and human-triggered avalanches unlikely.
|Natural avalanches unlikely; human-triggered avalanches possible.
|Natural avalanches possible; human-triggered avalanches likely.
|Natural avalanches likely; human-triggered avalanches very likely.
|Natural and human-triggered avalanches certain.
|Avalanche Size and Distribution
|Small avalanches in isolated areas or extreme terrain.
|Small avalanches in specific areas; or large avalanches in isolated areas.
|Small avalanches in many areas; or large avalanches in specific areas; or very large avalanches in isolated areas.
|Large avalanches in many areas; or very large avalanches in specific areas.
|Very large avalanches in many areas.
Over the last week the weather has been relatively benign with some ridgetops seeing periods of sustained moderate winds. Shallow pockets of wind deposited snow can be found up to 6” in places. These shallow wind slab pockets are sitting on poorly bonded faceted snow, but have been mostly non-reactive in the Turnagain Pass zone. Less information exists in Summit Lake, Portage, and Girdwood Valley as well as upper elevations above 4000’. Within this larger zone there are places that have received more exposure to wind and finding a tender wind slab is possible. A wind slab if triggered is unlikely to bury a person, but could take you for a ride in the wrong spot. Use caution in high consequence terrain steeper than 40°.
Only a trace of new snow was measured in the last 24 hours with only an additional inch expected today. If we receive more than a few inches today, you may see “sluffing” on steep terrain. In general this is a low hazard, but if riding or skiing on slopes steeper than 40° pay attention. Loose snow with enough volume and momentum can knock you off your feet.
No new glide activity or movement has been observed in the last few days. New snow and poor visibility can make it difficult to identify areas with glide cracks present. Use safe travel protocols when stopping to take a break and be aware of your run-out distances from terrain above you.
Low snow coverage
Below 1500’ low snow coverage is deceiving with only a few inches of new snow covering rocks, ice and vegetation. Take your time getting in and out of the alpine today.
View looking from Seattle Ridge South with Sunburst in the distance. Coverage is thin in the valley bottom, but looks much more like winter!
Yesterday light snow fell throughout the day with only a trace of accumulation in both Girdwood and Turnagain Pass. Winds were light to moderate (5-15mph) from the East near Sunburst and Southwest at Seattle Ridge. Temperatures were in the low to mid 20’sF.
Only a trace of snow is forecasted for today and skies are expected to clear this afternoon. Temps should be in the low to mid 20’sF. Ridgetop winds are expected to be light (5-10mph) from the Southeast.
Tomorrow is looking very similar with more weak frontal air pushing into Western Prince William Sound. We may see scattered snow showers, but again we’re only anticipating a trace of new snow. Winds should be light to moderate from the East with temperatures in the mid to low 20’sF.
|Temp Avg (F)
|Snow Depth (in)
|Center Ridge (1880′)
|Summit Lake (1400′)
|Alyeska Mid (1700′)
|Temp Avg (F)
|Wind Avg (mph)
|Wind Gust (mph)
|Seattle Ridge (2400′)
|Avalanche: Base of Seattle Ridge
|Troy Tempel, Thomas Lees, .Josh Bollaert, Damian Naquin
|Observation: Lynx creek
|Observation: Tincan Trees
|Moderow / Clayton
|Observation: Turnagain (below the uptrack)
|Alaska Avalanche School Moto Level 2
|John Sykes Forecaster
|Observation: Tincan Backdoor, Center Ridge
|AAS Level 1 / R Sullivan
|Avalanche: Tincan Trees
|Schauer/ Moderow/ Stephenson Forecaster
|Schauer/ Moderow/ Clayton Forecaster