They keep going and going and going… The glide avalanche cycle in the advisory area continued yesterday. Observers saw new glide avalanches; new cracks appearing and existing glide cracks growing. These are on all aspects in the mid-elevation band (1000′-2500′). Please avoid spending any time underneath glide cracks. The glides are taking over the landscape. Poor visibility today may make it harder to see where they are. It is important to note that Seattle Ridge is littered with them and it is hard to travel without being in the line of fire.
Glide crack and avalanche activity on Seattle Ridge yesterday.
Yesterday temperatures reached the 47F at 1880′, and for the fifth night in a row the mid elevation zone remained above freezing with rain falling overnight. Wet loose natural activity was observed yesterday on all aspects. Observers in the Girdwood Valley reported it being very easy to trigger loose wet snow avalanches and once moving that they were quickly building mass and momentum.
Today’s weather forecast is for rain showers that will add moisture to an already wet snowpack and may cause natural wet loose avalanches. In addition, if the sun pokes out at all, it could also be a trigger for natural activity.
Today a skier or snowmachiner triggering a wet loose avalanche will be likely below 2500’ on slopes steeper than 35 degrees. Wet avalanches once initiated can entrain more snow rapidly and are very hard to get out of. They can be particularly hazardous if they push you into a terrain trap and bury you deeply. If your skis or snowmachine are sinking deep into wet snow this is an obvious clue that the snow is unstable. Stick to low angle terrain and avoid runout zones where avalanches from above may catch you.
Wet loose activity on the West Face of Lipps.
Wind slabs and Cornices:
There may be some new snow and wind today creating new tender wind slab and/or adding weight to old lingering wind slabs and enormous cornices in the Alpine. Watch for cracking in steep wind-loaded areas and avoid travel on or under cornices. Today’s continued warm temperatures will make cornices more likely to fail.
Yesterday was partly cloudy with light to moderate easterly winds. Temperatures were in the low 30Fs @ 3000′ and the 40Fs @ 1000′. There were a few light rain showers. The clouds rolled in overnight and brought rain to the advisory area up to appoximately 2000′.
Today will be mostly cloudy with rain and snow showers throughout the day. 0-2″ of snow possible (.2″ of h2o). Temperatures are forecasted to be in the 40Fs at 1000′ and low 30Fs @ 3000′. The sun may shine through at some point. Winds will be 15-25 mph from the southeast with locally higher gusts.
Saturday may bring a break in the showers as a ridge moves over the area before another storm impacts the forecast region into next week. Stay tuned for the temperatures and precipitation type associated with the system. The NWS forecast used the words “somewhat murky forecast for south central” in the discussion last night.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||39||rain||.4||126|
|Summit Lake (1400′)||37||rain||.5||41|
|Alyeska Mid (1700′)||36||rain||.2||104|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||30||SE||20||41|
|12/10/19||Turnagain||Avalanche: Tincan and Sunburst from the air||CNFAIC Staff|
|12/10/19||Turnagain||Observation: Tincan||Nancy Pfeiffer|
|12/08/19||Turnagain||Avalanche: Tincan||Ryan Van Luit Forecaster|
|12/06/19||Turnagain||Avalanche: Sunburst||Billy Finley|
|12/04/19||Turnagain||Observation: Sunburst||A.Johnston-Bloom/ W.Wagner/ R.Van Luit Forecaster|
|12/03/19||Turnagain||Observation: Hippy Bowl||Nick Langowski|
|12/01/19||Turnagain||Observation: Tincan, All elevations||Eric Roberts|
|12/01/19||Turnagain||Observation: Tincan||Andy Moderow|
|11/30/19||Turnagain||Observation: Tincan Treeline Plateau/ Common Bowl/ Ridge||Eric Roberts|
|11/29/19||Turnagain||Observation: Sunburst Ob #2||Aleph Johnston-Bloom 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: firstname.lastname@example.org
|Area||Status||Weather & Riding Conditions|
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