A weak storm system has entered the Eastern Turnagain Arm region this morning. Snowfall has just begun and Easterly winds have just picked up. We are expecting 3-5″ of snow today above 1,000′ with rain below (this rain/snow line could creep up through the day and we could see more than 5″ of snow in places). With this new snow and ridgetop winds in the 15-30mph range, we can expect shallow wind slabs to be forming. These slabs will be sitting on this past week’s variable surfaces (sun crust, wind crust, soft settled powder). How well the fresh slabs will bond with the old surfaces will be the question today.
If you are headed out pay close attention to:
1) How much snow has fallen.
2) What are the winds doing. Are they transporting snow along the ridgelines? Are they loading slopes?
3) How well is the new snow/wind loaded snow bonding with the underlying surface? Quick hand pits can be good to suss this out.
Cornice falls: As is the general rule, these are worth avoiding/limiting time under as they continue to break off. Today they will get stressed a bit more with new snow and wind.
Photo below: Pete’s North ridgeline from yesterday. Recent cornice falls can be seen along the ridge.
Although we have a short burst of snowfall and wind on tap today, glide avalanches remain just as much of a concern. This is due to the countless number of glide cracks in places folks recreate and the destructive nature of a glide avalanche in the event one does release. There were several glide cracks that slide yesterday in the Summit Lake area and one possible new glide avalanche in the Lynx creek drainage. All that said, it’s worth keeping a lookout for cracks and minimizing time under them – no question!
Photo from yesterday: Very large glide crack on the SW face of Cornbiscuit. You can see tracks on the looker’s left of the 8-12+’ deep crack.
Partly sunny skies, with some blue holes, covered the region yesterday. A morning snow squall added a trace of snow at sea level in Girdwood (and a few inches in Anchorage – causing some driving mayhem) but this all missed Turnagain Pass. However, snowfall has started to fall this morning and as of 6am we have seen 2″ accumulate. Winds during the past 24-hours have been steady averaging ~10mph with gusts to 20mph. Temperatures have been in the mid 20’s F on the ridgelines and ~30F at 1,000′.
Today we have a weak system moving over us from the East. This will give us a chance for 3-5″ of snow with a rain/snow line between 1,000 and 1,500′. Temperatures should climb through the day and peak around 35F at 1,000′ and the upper 20’sF on the ridgelines. Winds are slated to bump up to the moderate-to-strong category from the East along the ridgetops (15-30mph with stronger gusts).
This system looks to exit this evening and tomorrow, Sunday, we should see party sunny skies with a possible snow shower here and there. Stay tuned.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||25||2||0.2||139|
|Summit Lake (1400′)||25||0||0||42|
|Alyeska Mid (1700′)||25||2||0.15||104|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||26||–||–||–|
|01/31/23||Turnagain||Observation: Johnson Pass area||Megan Guinn / W Wagner Forecaster|
|01/29/23||Turnagain||Observation: Tincan Backdoor||AAS-Level 1 1/27-1/30|
|01/28/23||Turnagain||Observation: Sunburst||Brooke Edwards|
|01/28/23||Turnagain||Avalanche: Seattle Ridge||W Wagner|
|01/28/23||Turnagain||Observation: Tincan Common||Tony Naciuk|
|01/27/23||Turnagain||Observation: Sunburst||John Sykes|
|01/27/23||Turnagain||Avalanche: Lynx Creek||Megan Guinn / W Wagner|
|01/25/23||Turnagain||Observation: Cornbiscuit||John Sykes Forecaster|
|01/22/23||Turnagain||Avalanche: Tincan||Schauer/ Guinn|
|01/21/23||Turnagain||Avalanche: Seattle Ridge||Elias Holt|
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: firstname.lastname@example.org
|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.