(originally posted April 2018, updated March 2019)
With the arrival of April the Spring skiing (and falling) season has started in Tuckerman Ravine. After watching a couple tumble almost 500 feet down “The Lip” last year I thought some advice on fall prevention might be prudent.
The snow conditions in Tuckerman Ravine vary greatly this time of year from day to day and often hour to hour. The best type of snow for descending this time of year is referred to as “corn snow”. This is snow that has undergone multiple freeze thaw cycles and looks like little kernels of corn. Backcountry skiers jest that we are “harvesting corn” when the conditions are good. But corn snow is all about timing.
Try to ski too early in the season or the day and the corn hasn’t formed yet. Conditions that promote the formation of good corn snow are close or above freezing temperatures, strong solar radiation, and low winds. Try too ski to late in the day when the sun has dipped below the ridge will often find that the soft buttery edge-able forgiving corn has quickly transformed back into a frozen mess. Literally minutes can make a difference in how a run will ski.
So how do you hit it at the right time? First, you check the Higher Summits Forecast before you even leave Pinkham Notch. You’re hoping that the forecasted temps are at least in the mid to upper 20’s and that summit winds are under 50 mph. You also want to see “Mostly Sunny” or “In The Clear”. Overcast days are not for harvesting corn.
Next you should check the Current Summit Conditions. Specifically what you want from this page is the temperature “profile” that shows what the temperatures are at various elevations on the mountain, wind speeds, and sky condition. This page, along with the Higher Summits Forecast, are both bookmarked on my iPhone for quick daily reference.
Ideally temps in the Ravine will be at or above freezing, winds will be low, and the sky will be mostly clear. The lower charts help identify trends. In the above example the winds have died to almost nothing, temperatures are increasing, and barometric pressure has risen and is holding steady (indicating not a big change for the rest of the day). Visibility however is only 1/8 of a mile with some snow and freezing fog (shown under “weather”)… this means no corn today.
Finally, to determine when the slope you want to descend will lose the sun you have a few tools at your disposal. During trip planning you can use CalTopo’s “Sun Exposure” layer to see when certain aspects and runs will lose the sun. In this example you can see what areas still have sun at 2 PM today.
While actually out skiing you could also use an app like PeakFinder AR. An example of how I might use this app would be climbing up Right Gully and deciding to go ski in the East Snowfields for a bit before returning to descend Right Gully. Halfway up the gully, near the steepest pitch, I open up the PeakFinder app and find the path of the sun. Where it intersects the ridge the app will mark the exact time the sun will go below the ridge line (often an hour or more before true sunset). I know now what time I need to be through this spot if I still want soft snow!
Next up let’s look at…
Later in the season there will likely be established “boot ladders” where dozens, or hundreds, of other visitors will have kicked deep steps into the 40 to 50 degree slopes allowing people to ascend these slopes with little extra gear.
However, some of these items could really make a difference early in the season, or later in the day, and also could allow you to travel outside of the established boot ladder, which would make you less of a sitting duck if someone higher up looses their footing. First, the most important…
Most skiers these days wear helmets at ski resorts while ripping fast groomers and shredding pow in the glades but then many choose not to wear a helmet while skiing in Tuckerman Ravine (which has much more objective hazards than a controlled ski resort). Head injuries can occur from falls, collisions with other skiers, and occasionally falling ice and/or rocks. Most ski helmets though are too hot for a 50 degree sunny day in the ravine, so consider buying or borrowing a well ventilated climbing helmet. New this year the Petzl Meteor Helmet is the first CE-certified ski touring helmet and would be my first pick (hoping to have one in hand soon to review, but Petzl is sold out.
When the professional rangers of the Mount Washington Avalanche Center say that “long sliding falls” are a specific hazard today one would be wise to carry, and know how to use, a mountaineering axe to arrest or prevent a fall. This would be in hand during the ascent with your ski poles strapped to your pack (baskets up). While there are many models that will suit this purpose I am currently carrying the Black Diamond Raven Ultra Ice Axe which is incredibility light-weight (12 ounces) yet still has a steel head and pick. Lots of experienced skiers like the added flexibility of carrying a Black Diamond Whippet Pole (also available in a carbon model) instead of a full fledged mountaineering axe, and if snow conditions are soft enough this can be a great option.
While an established boot pack might feel secure leaving the boot back or taking the path less traveled may require some traction. Micro-spikes might be helpful on the lower angled hiking trail below Hermit Lake (Hojo’s) but won’t cut it in 40 degree terrain. For snowboard boots check out the Black Diamond Neve Strap Crampons. For those who count ounces and wear technical touring boots my current favorite is the feather-weight Petzl Leopard LLF Crampons.
If you would like to take a course in basic crampon and mountaineering axe technique I teach a one-day skills course at Northeast Mountaineering. I also offer Backcountry Skiing Skills Courses along with Ski Mountaineering and this is the perfect time of year to attend one of these courses! Contact me at email@example.com for availability.
Skiing (and falling) in Tuckerman Ravine is a time-honored tradition and rite-of-passage for many East Coast and beyond skiers. YouTube is full of videos of these falls. Some result in no injury, others result in “snow rash”, bruises, cuts, broken bones, a least one LifeFlight, and occasional fatalities. Hopefully the above advice can help prevent a few of these from happening this season. There is a lot of fun and sun to be had in the next few weeks in Tuckerman Ravine but let’s be sure we respect the hazards that exist in our wild places.
See you in the mountains,
Northeast Alpine Start