21-22

Twin Falls/Hyalite

Date
Activity
Ice Climbing

Yesterday while belaying at the base of Twin Falls, right side, a small slab of snow to the right of the climb destabilized and fall onto me. I managed to stay standing and totally ok, but the rope coils and a water bottle were pulled down hill. It could have pulled me down, causing me to pull off my belayer. I think a piece of ice fell from the climb and triggered the slab as I heard a noise, though it could've just been the snow spontaneously cracking. 

Region
Northern Gallatin
Location (from list)
Hyalite - main fork
Observer Name
Rachel Kleiman

Mt. Ellis

Date
Activity
Skiing

No signs of instability on Ellis.  Approximately 4 inches of new snow from the last storm.  Skiing was good.  It is amazing how thin the snow pack remains.  A quick pit north of the burn and approximately 300 vertical feet short of the summit was 70 cm deep with no obvious layers.  There was moderate wind out of the west on the summit.

Region
Northern Gallatin
Location (from list)
Mt Ellis
Observer Name
David Combs

GNFAC Avalanche Forecast for Thu Jan 27, 2022

Snowpack and Avalanche Discussion

<p>Today, there is not much wind and not much new snow. You may find isolated wind slabs near the ridgelines that could be triggered, but these would be few and far between. Yesterday skiers backed out of avalanche terrain in Hyalite and south of Cooke City when they got wind drifts to crack. Today these drifts will be less likely to fracture.&nbsp;</p>

<p>A couple days ago a thin and wide avalanche broke free on Saddle Peak. Alex took a <a href="http://www.mtavalanche.com/images/22/shallow-wide-avalanche-saddle"><st…; yesterday and its width caught our attention. Slides that propagate far typically have a weak layer underlying the slab and we are hypothesizing that a razor-thin layer of facets might have been responsible. We will check it out today. The odds of getting caught in a slide like this can be lessened with a quick stability test of the new/old snow interface. <em>Throughout the forecast area our avalanche concerns are limited to the upper foot of the snowpack.</em> In the Bridger, northern Gallatin and northern Madison Ranges this interface is where instability will show itself. In the southern Madison and southern Gallatin Ranges, Lionhead and Cooke City, in addition to this interface there’s a weak layer of surface hoar buried about 8” deep. We mitigate both concerns the same way, by digging and testing instead of blindly throwing ourselves into avalanche terrain.&nbsp;</p>

<p>Avalanches are unlikely throughout our forecast area today and the danger is rated LOW on all slopes. As always, retreat if you find instability (cracking, poor test scores), and when you find good slopes to slide and ride on only expose one person at a time.&nbsp;</p>

<p>If you get out, please send us your observations no matter how brief. You can submit them via our <a href="https://www.mtavalanche.com/node/add/snow_observation"><strong><u>websi…;, email (<a href="mailto:mtavalanche@gmail.com"><strong><u>mtavalanche@gmail.com</u></str…;), phone (406-587-6984), or Instagram (#gnfacobs).</p>

Upcoming Education Opportunities

See our education calendar for an up-to-date list of all local classes. Here are a few select upcoming events and opportunities to check out:

Submarine - Woody Ridge

Date
Activity
Skiing

Toured out Woody today with hopes of skiing Submarine. We backed off when we found plenty of dense wind affected snow on the aspect we desired. Some minor cracking around obvious rollers was noted.

I dug a pit lower down in the saddle in a less wind affected area. No results on an CT or ECT and try as I might I could not find any buried surface hoar.  Skiing in the trees was great!

Region
Cooke City
Location (from list)
Woody Ridge
Observer Name
Nick Roe