24-25

Loose snow avalanches around Blackmore

Mt Blackmore
Northern Gallatin
Code
L-R1-D1
Aspect Range
N-E-SE
Latitude
45.44440
Longitude
-111.00400
Notes

Saw lots of small loose avalanches on Mt Blackmore and nearby slopes, some appeared to be natural and others skier triggered. We saw multiple dry loose on N and E aspects and a wet loose on a southeast aspect.

We also noticed recent wind loading on the southeast side of ridgetops and scouring on north slopes.

Number caught
0
Number buried
0
Avalanche Type
Loose-snow avalanche
R size
1
D size
1
Problem Type
New Snow
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

south of Cooke obs

Date
Activity
Skiing

No Recent avalanche activity observed in Hayden Creek or Republic Creek today with the the exception of some small dry loose in steep terrain. No Collapsing or Cracking during our day out today. 2" new at 8700' at 9am with another inch throughout the day. East winds were light throughout the day.

 

Region
Cooke City
Location (from list)
Hayden Creek
Observer Name
B Zavora

Thin new snow slabs

Date
Activity
Skiing

Toured into the emigrant gulch area today. At around 7600’, I found some touchy storm slabs. These only seemed to be reactive on solar aspects (crust). Near a ridge line, the winds were coming from the east, it was weird. Socked in all day with lots of snow flying around. 

Region
Out of Advisory Area
Observer Name
Jay Alford

Loose avalanches around Blackmore

Date
Activity
Skiing

Saw lots of small loose avalanches on Mt Blackmore and nearby slopes, some appeared to be natural and others skier triggered. We saw multiple dry loose on N and E aspects and a wet loose on a southeast aspect.

We also noticed recent wind loading on the southeast side of ridgetops and scouring on north slopes.

Region
Northern Gallatin
Location (from list)
Mt Blackmore
Observer Name
Heather Myers

GNFAC Avalanche Forecast for Thu Mar 6, 2025

Snowpack and Avalanche Discussion

<p><span><span><span><strong><span><span>The avalanche danger will be rising today</span></span></strong></span></span></span><span><span><span><span><span><span> with wind and snow, but there’s a lot of uncertainty with how much snow will fall. .</span></span></span></span></span></span></p>

<ul>
<li><span><span><span><strong><span><span>Wind slab avalanches</span></span></strong></span></span></span><span><span><span><span><span><span> will be the main hazard today as winds from the E and NE increase by afternoon. These wind slabs will be widespread and easy to trigger. HEADS UP - Expect drifting in odd places because winds don’t typically blow from the east.</span></span></span></span></span></span></li>
<li><span><span><span><strong><span><span>Persistent slab avalanches</span></span></strong></span></span></span><span><span><span><span><span><span> 2-3 feet deep remain a threat on isolated slopes in the mountains near West Yellowstone (southern Madison and Gallatin Ranges, and Lionhead). This is a tricky problem and has surprised riders on slopes like one at </span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/34421"><span><span><span><span><span><… last Friday</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span> and </span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/34413"><span><span><span><span><span><… Creek last Thursday</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span>.</span></span></span></span></span></span></li>
<li><span><span><span><strong><span><span>Storm slab avalanches</span></span></strong></span></span></span><span><span><span><span><span><span> in the new snow could become a problem this afternoon on all steep slopes if forecasted snow amounts of 8-12 inches pan out.</span></span></span></span></span></span></li>
</ul>

<p><span><span><span><span><span><span>The avalanche danger will rise to CONSIDERABLE today on wind loaded slopes and MODERATE on non-wind loaded slopes. With the danger rising and multiple avalanche problems, </span></span></span></span></span></span><span><span><span><span><span><u><span><span>the best plan today will be to step back mostly avoiding avalanche terrain and let the storm play out.</span></span></u></span></span></span></span></span></p>

<p><span><span><span><span><span><span>The avalanche danger today near Bozeman, Big Sky, and Cooke City will be rising as well mainly due to east winds.</span></span></span></span></span></span><span><span><span><strong><span><span> Watch out</span></span></strong></span></span></span><span><span><span><span><span><span> for places locally heavier snowfall amounts where the danger will be higher. These places could be in our normal forecast zones or more likely areas to the east.</span></span></span></span></span></span></p>

<ul>
<li><span><span><span><strong><span><span>Wind slab avalanches</span></span></strong></span></span></span><span><span><span><span><span><span> will be the main concern today, and strong winds from the east will cause <strong>drifting in unusual places</strong>. Strong easterly winds had already developed in the Bridgers early this morning and should blow strong in all other places by this afternoon. I bet fresh wind slabs will be easy to trigger but shallow.&nbsp;</span></span></span></span></span></span></li>
</ul>

<p><span><span><span><span><span><span>Don’t take today’s avalanche situation lightly. </span></span></span></span></span></span><span><span><span><span><em><span>Weird weather (east winds) can cause weird avalanches</span></em></span></span></span></span><span><span><span><span><span><span>, so I’d be stepping back today, generally avoiding avalanche terrain to see what this storm does regardless of how much snow falls. Today the avalanche danger is MODERATE. </span></span></span></span></span></span></p>

Upcoming Avalanche Education and Events

Our education calendar is full of awareness lectures and field courses. Check it out: Events and Education Calendar

Cracking in wind drifted snow

Date
Activity
Skiing

Observed some cracking in wind drifted snow above tree line NE facing slope. No avalanches observed 

 

Region
Cooke City
Location (from list)
Hayden Creek
Observer Name
J Mundt