20-21

Beehive Basin

Date
Activity
Skiing

Beautiful skiing today out in Beehive. I skied the SW couilar that empties down into the basin a couple of times, pretty sure it has a name but I’m not sure what it’s called. Then dropped off the back side and skied a N facing shot into Bear Basin and skinned back up the N side of the ridge and came back out to the Beehive trailhead. I found very stable conditions with only about 2” of new snow on the older crust, up to 10” where the wind blew it in. The S facing stuff was dreamy, well bonded, I dug several pits and got nothing, ECT X. The snow on the ground is very warm and rotten and full of water. The ice on the ground isn’t even frozen. The new snow only reacted once in a very small plate shaped crack coming off my ski as I was skinning. I jumped around as hard as I could in a few different places and even where it was wind loaded and I couldn’t get anything to move even a little bit. Between the most recent crust, which is very supportable, and the new snow is a layer of graupel. The new snow is super cold on top and the snow on the ground is super warm! There is 2-4’ of snow where I was and only about a foot lower down. Wind affect is really obvious, there are ripples and signs of loading everywhere. I avoided several tempting looking lines because of obvious wind slabs and heavy loading. The wind slabs are more prevalent on the N facing stuff. When we dropped onto the N facing shot, it was way slabbier and firmer on the surface from the wind. It’s a nice combination of wind scoured and wind slabbed but still couldn’t get anything to move. Also no signs of natural activity anywhere, not even point releases on the sunny slopes.

Region
Northern Gallatin
Location (from list)
Beehive Basin
Observer Name
Jeanine Dalimata

GNFAC Avalanche Forecast for Sun Oct 25, 2020

Snowpack and Avalanche Discussion

<p>We’re on the tail end of the first big storm cycle of the season. Triggering avalanches remains a very real possibility. With cold temperatures and continued blowing snow it will take several days for the hazard to significantly decrease.&nbsp;</p>

<p>During this storm we’ve seen avalanches and shooting cracks throughout the advisory area: in the Bridger Range (<a href="https://www.mtavalanche.com/images/20/wind-slab-avalanche"><strong><u>p…;, </strong><a href="https://www.mtavalanche.com/images/20/cracking-frazier-basin"><strong><…;), on Mt Blackmore in the northern Gallatin Range (<a href="https://www.mtavalanche.com/images/20/loose-avalanche-mt-blackmore"><st…;), near Cooke City, and on the Sphinx in the Madison Range (<a href="https://www.mtavalanche.com/images/20/shooting-cracks-sphinx"><strong><…;). Wind drifted snow is the common theme between all these signs of instability. Slopes with drifted snow have the most continuous snow cover and are also where you are most likely to trigger avalanches. With shifting winds today and tomorrow, watch out for new slopes being loaded. Shooting cracks or recent avalanches are bullseye data that the snowpack is unstable. Watch Doug’s <a href="https://youtu.be/tpbI_mgWKJ4"><strong><u>video</u></strong><u&gt; </u></a>from the Sphinx for a good reminder to stay heads up, even though it’s early season.&nbsp;</p>

<p>Snow depths range from less than a foot at lower elevations to 2-3 feet at higher elevations in the northern ranges and around Cooke City. This is plenty of snow to cause a season ending avalanche. Despite it being October, because there is snow on the ground, normal mid-winter travel advice applies: bring a partner, travel one at a time in avalanche terrain, and make sure you’re carrying rescue gear (beacon, shove and probe) and know how to use it. Hunters, ice climbers, and skiers have all been caught in early season avalanches (<a href="https://www.mtavalanche.com/accidents"><u>accident reports</u></a>). Be cautious and stay safe, we have a long winter ahead.</p>

<p>We’ll be updating the <a href="https://www.mtavalanche.com/weather/wx-avalanche-log"><strong><u>weather log</u></strong></a>, <a href="https://www.mtavalanche.com/photos"><strong><u>photos page</u></strong></a> and <a href="https://www.mtavalanche.com/avalanche-activity"><strong><u>avalanche activity list</u></strong></a> daily and issuing early season updates throughout the fall as conditions merit. If you have avalanche, snowpack or weather observations to share, please 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 Avalanche Education and Events

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:

Sheep Basin Trail

Date
Activity
Skiing

Just skiied up to the entrance of Sheep Basin. Snowing and blowing. Didn’t go past the first avy zone. Lots of cracking off drifts on my way up. Over a foot of new snow blown in. Nice light pow. The cold air was just blowing in as I turned around. Hasn’t stopped snowing since yesterday afternoon.

Region
Cooke City
Location (from list)
COOKE CITY
Observer Name
Steve Dober

Loose snow avalanches on Blackmore

Mt Blackmore
Northern Gallatin
Code
L-N-O
Aspect
E
Latitude
45.44440
Longitude
-111.00400
Notes

Today I skinned in and skied around the E side of the N ridges coming down off of Blackmore. The snow is about 2’ deep off of the ridge down to the bottom of the bowl on the east faces, with variations where the wind has loaded/stripped the snow. The wind was gusting out of the N/NW/W.  I observed some natural loose dry sluffs on the N face and the E face off the N ridge. They look like they came down in the last 24 hours with this new snow and wind; they were still fairly defined when I saw them.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Loose-snow avalanche
Trigger
Natural trigger
Bed Surface
O - Old snow
Problem Type
Wind-Drifted Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

GNFAC Avalanche Forecast for Sat Oct 24, 2020

Snowpack and Avalanche Discussion

<p>Today’s storm will create avalanches. In the last 48-hours ridge winds increased (<strong><a href="https://www.mtavalanche.com/images/20/wind-loading-sphinx">photo,</a></…; <strong><a href="https://www.mtavalanche.com/images/20/wind-ripples-near-fairy-lake">pho…;) and loaded slopes resulting in cracking and a few small avalanches. These were seen in the Bridger Range (<strong><a href="https://www.mtavalanche.com/images/20/wind-slab-avalanche">photo</a&gt;, <a href="https://www.mtavalanche.com/images/20/cracking-frazier-basin">photo</a>…;) and Mt Blackmore in the northern Gallatin Range (<strong><a href="https://www.mtavalanche.com/images/20/loose-avalanche-mt-blackmore">pho…;). I was able to trigger a 4” wind slab yesterday on Sphinx Mountain. Shooting cracks in the snow as we walked warned us of the danger (<strong><a href="https://www.mtavalanche.com/images/20/shooting-cracks-sphinx">photo</a>…;), and sure enough, I was able to intentionally trigger a slide on a steep, small slope with a whack of my ice-tool (<strong><a href="https://youtu.be/tpbI_mgWKJ4">video</a></strong&gt;). Although thin, the avalanche released 75’ up the hill and raced past us over a 100’ cliff. We made an easy decision to turn around.</p>

<p>Last night and today’s snowfall will make slopes more unstable. Be aware that cracking or avalanche activity, no matter how small, are signs to avoid avalanche terrain. On average, snow depth on the ground is about 12-16” with Cooke City having 38”. &nbsp;Skiers, boarders and snowmobilers should treat early season as they would mid-winter. Travel one at a time in avalanche terrain and carry rescue gear (beacon, shovel and probe). Hunters need to be extra careful as they cross slopes or gullies that are filled with wind-blown snow. Hunters have been caught in years past and this weekend’s rising avalanche danger is coinciding with opening day.</p>

<p>Triggering a small avalanche yesterday was a reminder to get my act together. My rescue skills are not up to par, my gear is a bit of a junk show, and I’m not feeling as sharp as I want in my snow assessment. I imagine most of you can relate and this weekend is a great opportunity to tighten our scene. Put fresh batteries in your beacon and practice with it, double check your air bag canister, and get in the habit of looking at the daily <strong><a href="https://www.mtavalanche.com/weather/wx-avalanche-log">weather log</a></strong>, <strong><a href="https://www.mtavalanche.com/photos">photos page</a></strong> and <strong><a href="https://www.mtavalanche.com/avalanche-activity">avalanche activity list</a></strong>.</p>

<p>Ian will issue an updated avalanche bulletin tomorrow morning. &nbsp;If you have avalanche, snowpack or weather observations to share. Please submit them via our <a href="https://www.mtavalanche.com/node/add/snow_observation"><strong>website<…;, email (<a href="mailto:mtavalanche@gmail.com"><strong>mtavalanche@gmail.com</strong></a…;), phone (406-587-6984), or Instagram (#gnfacobs).</p>

Upcoming Avalanche Education and Events

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: