The wet spring storm that is impacting our area has added almost 2″ of rain to an already wet snowpack. As the snowpack gets warmer and more saturated below 2500′ the already active glide avalanche cycle may ramp up even more. An additional glide avalanche ran over the uptrack on Seattle Ridge and another piece of the crack on the West face of Magnum also released. Watch for new cracks appearing and avoid travel under existing glide cracks.
West face of Magnum with recent wet loose avalanches and a new glide release adjacent to the one from last week.
New glide avalanche on the Seattle Ridge uptrack (farthest right streak).
Turnagain Pass received almost 2″ of water yesterday and another .5″ is forecasted to fall today. The rain is falling onto an already wet snowpack. Human triggered wet loose avalanches are likely below 2500′ and natural ones are possible. Skiers reported triggering a small wet loose avalanche on Sunday. Visibility was limited yesterday but new wet loose avalanches were observed on the West face of Magnum. We have yet to see surface slides gouging into deeper layers but this potential may increase. As the rain/snowline dances around 2500′ rain may fall onto snow and trigger wet loose avalanches as well. We will continue to monitor whether or not the rain is impacting the drier snow in the Alpine. If you are traveling through the glop today pay attention to how deeply you are penetrating into the snowpack, watch for roller balls and remember loose avalanches can knock you off your feet, are hard to escape and can push you into terrain traps.
Wet day at Turnagain Pass
Temperatures at 3000′ have remained below freezing which means the rain falling at the road will have been snow in the Alpine. We suspect 6-12″ have fallen in the past 24 hrs. This combined with the sustained 30-40 mph winds may have formed tender wind slabs along ridgelines. Look for drifted snow and watch for cracking underfoot. The wind and snow may also have added stress to very large cornices. Avoid travel on or under these beasts.
Yesterday was overcast and rain fell throughout the day (snow above 2500′?). Temperatures were in the high 30Fs at 1000′ and the high 20Fs at 3000′. Easterly winds were steady 30-40mph with gusting into the 80s.
Today will be mostly cloudy with another .5″ of rain forecasted to fall. Winds will be easterly 15-35 mph potentially increasing in the afternoon. Temperatures will be in the low 30Fs to low 40Fs depending on elevation.
Tomorrow looks to be similar and to quote the National Weather Service, “NO BIG CHANGES IN THE WEATHER FOR THE EXTENDED PERIOD. WEDNESDAY EVENING AND THURSDAY FEATURE AN EXTENSION OF THE CURRENT WEATHER PATTERN.”
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||37||0||1.8||104|
|Summit Lake (1400′)||41||0||0||15|
|Alyeska Mid (1700′)||36||0||.8||87|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||30||ESE||25||60|
|04/21/21||Turnagain||Observation: Sunburst||Schauer/ Behney Forecaster|
|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|
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.