|Travel Advice||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.|
The glide avalanche cycle continues with new activity occurring on a daily basis. Springtime weather, warm temperatures and rain, continues to add stress to the mid-elevation snowpack where the majority of glide cracks exist. If venturing into the mountains choose your route wisely. It is very important to identify terrain with existing cracks and avoid any travel under the runout of glides.
A view yesterday of Repeat Offender on Seattle Ridge. Even though this area has closed to motorized use, travel on the Seattle Ridge side of the road is still not recomended.
Close up of existing glide cracks that still threaten the normal “skin route” to Seattle Ridge.
Over the last 48 hours 0.8” (Snow Water Equivalent) has fallen in Turnagain Pass. This is equal to about 3-5” of wet/moist snow in the mid elevations (1800’-2500’) and rain below this. Today’s showery weather will likely add another 3-5” of wet snow to the mid elevation band. Below 2500’ human triggered wet loose avalanches are likely, if initiated on steeper slopes. In general avoid steep terrain if the surface snow is wet or older snow (where it has been raining) is unsupportable. These are obvious clues the snow is loosing its strength.
*In the alpine where drier snow has fallen over the week, solar exposure will be important to monitor should the sun appear. With warm springtime temperatures, any period of direct sun could rapidly melt surface snow, and natural wet loose activity will be possible.
Visibility has been very poor in Turnagain over the last few day, however the DOT webcam captured a photo of wet loose activity on Tincan’s CFR ridge during a brief clearing Tuesday(4/26) evening.
Over the last four days an estimated 1-2’ of new snow has fallen in the alpine with periods of strong winds earlier in the week. Today Moderate Easterly ridgetop winds are expected with an additional 5” of new snow. Be on the look out for wind slabs on leeward features. Careful snowpack evaluation is essential in the alpine, and don’t forget blowing snow and cracking underfoot are obvious signs the snowpack is stressed out. The wind and snow may also have added stress to very large cornices. Avoid being under cornices and give them extra space along ridgelines.
Yesterday scattered rain showers and obscured skies were observed throughout Turnagain Pass. A total of 0.4 € of rain fell at Center Ridge Weather station (1880′) and daytime temperatures averaged in the high 30Fs with overnight temperatures hovering around 33F. Easterly Ridgetop winds were Light becoming Moderate (20’s mph) by late afternoon.
Rain showers are expected throughout the day and rain/snow line will be around 2200′. 3-5 € of snow (0.5 € of snow water equivalent) is expected today. Easterly ridgetop winds, averaging 15-30mph, will continue today. Daytime high temperatures for 1000′ are expected to reach 47F and overnight lows in the mid 30F’s.
Expect a similar weather pattern for Friday, with slightly less precipitation expected. Rain/snow line may push to 2500′.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||35||2||0.4||104|
|Summit Lake (1400′)||40||rain||0.1||12|
|Alyeska Mid (1700′)||38||rain||0.13||85|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||29||SE||12||33|
|12/03/23||Turnagain||Observation: Lipps||Paul Schauer|
|12/02/23||Turnagain||Observation: Seattle Ridge||Schauer / Keeler Forecaster|
|12/02/23||Turnagain||Observation: Tincan South Side||Anonymous|
|12/02/23||Turnagain||Observation: Eddies up track||Luc Mehl|
|12/01/23||Avalanche: Sunburst||John Sykes Forecaster|
|12/01/23||Turnagain||Observation: Eddie’s trees||Anonymous|
|12/01/23||Turnagain||Observation: Turnagain – God’s Country||Graham Predeger Forecaster|
|11/30/23||Turnagain||Avalanche: Tincan Trees||Kakiko Ramos-Leon|
|11/27/23||Turnagain||Avalanche: Tincan Ridge||Schauer/ Stiassny Forecaster|
|11/26/23||Turnagain||Observation: Road report: Slide with dirt on Repeat offender||Anonymous|