|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.
Lingering wind slabs from the strong Northwest winds earlier this week are littered about the mountains. They can be found to be a few inches thick to a foot thick. They vary from stiff and supportable to breakable and in some areas, still on the softer side. These slabs are a concern in steep complex terrain where even a small plate can knock you off your feet and pitch you somewhere you don’t want to go. One of my partners triggered one of these old pockets yesterday (a soft old wind slab ~10″ thick and 20′ wide in steep terrain photo below).
Sluffs are VERY easy to trigger in steep terrain harboring loose surface snow. These are running faster and farther each day as the snow is becoming looser and looser with the cold weather. Sluff management is key. This means know where your sluff will go and stay out of the way of the debris. The volume of these sluffs is on the moderate side but, still plenty to washing-machine someone if caught on a sustained slope.
SEE VIDEO HERE. Photo above by John Sykes: Sluffs triggered in the Gold Pan basin yesterday (behind the Magnum and Cornbiscuit ridges and near the top of Bertha Creek)
As Heather mentioned yesterday, there is some great skiing and riding to be had at the Pass. Honing in on the dappled surface texture (or orange peel as some say) to suss out the soft snow works well. Also, despite the continued hazardous approaches from the parking lots, there is now a “Tincan Rappel” which makes accessing the goods on Tincan easier – thanks to the helpful citizen for the installation!
Additional concerns include the
Yesterday brought another round of sunny, cold and beautiful weather. Temperatures were right around 0F from the parking lot to the ridgetops.
For today, we should have the same sunny skies and cold temperatures. In fact, the Sunburst weather station has just recorded the lowest temperature for this season at 3am, -6F (runner up is -3F on January 25th). There is slight inversion in place with minus single digits in valley bottoms. Temps should rise to the teens at 1,000′ but stay near 0F on the ridgelines. The Northwest winds should remain in the 5-10mph range on the ridgelines today and may pick up a hair later this afternoon into the 15mph range.
Our next shot of snow (and warmer temperatures) is on Sunday and Monday. Until then, enjoy the sunshine!
|Temp Avg (F)
|Snow Depth (in)
|Center Ridge (1880′)
|Summit Lake (1400′)
|Alyeska Mid (1700′)
|Temp Avg (F)
|Wind Avg (mph)
|Wind Gust (mph)
|Seattle Ridge (2400′)
|Observation: Seattle Ridge
|John Sykes Forecaster
|Observation: Kickstep NE Bowl
|Observation: TinCan Backdoor/ Center Ridge
|AAS L1 Turnagain
|Avalanche: Lynx Creek
|Observation: Turnagain, Seattle, Mt Ascension
|Silverton Mountain Guides
|Observation: Tincan Trees
|Dalpes/Thamm/ Schauer Forecaster
|Observation: Seward Highway across from Johnson Pass TH
|Avalanche: Base of Seattle Ridge
|Troy Tempel, Thomas Lees, .Josh Bollaert, Damian Naquin