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|
|04/19/21||Turnagain||Avalanche: Triangle, Seattle creek||Will Morrison|
|04/18/21||Turnagain||Avalanche: Turnagain Pass Road Obs||Andy Moderow|
|04/18/21||Turnagain||Observation: Seattle Ridge, approximately 300 yards south of the up track||Brent Byrne|
|04/17/21||Turnagain||Avalanche: Road obs||Johnston-Bloom / Moderow Forecaster|
|04/16/21||Turnagain||Avalanche: Seattle Ridge||Wendy Wagner Forecaster|
|04/16/21||Turnagain||Avalanche: Turnagain Pass, non-motorized side seen from Seattle Ridge||CNFAIC Staff Forecaster|
|04/16/21||Turnagain||Observation: Sunburst||Lance breeding|
|04/15/21||Turnagain||Observation: Tincan||Schauer/ Rothman Forecaster|
|04/13/21||Turnagain||Observation: Turnagain Pass Road Obs||A Schauer Forecaster|
|04/12/21||Turnagain||Observation: Tincan||Johnston-Bloom / Latosuo Forecaster|
Status of riding areas across the Chugach NF is managed by the Glacier and Seward Ranger Districts, not avalanche center staff. Riding area information is posted as a public service to our users and updated based on snow depth and snow density to prevent resource damage at trailhead locations. Riding area questions contact: email@example.com
|Area||Status||Weather & Riding Conditions|
This is a general backcountry avalanche advisory issued for Turnagain Arm with Turnagain Pass as the core advisory area. This advisory does not apply to highways, railroads or operating ski areas.