24-25

GNFAC Avalanche Forecast for Wed Mar 26, 2025

Snowpack and Avalanche Discussion

<p>It will feel like spring today (if not early summer) with temperatures 10 degrees warmer than yesterday and fewer clouds in the sky to block the incoming rays. These conditions will accelerate snow surface warming, and <strong>wet loose avalanches</strong> will pack a serious punch, increasing in volume and traveling farther than yesterday. Southeast through west-facing slopes, and terrain with exposed rocks or cliff bands, will be particularly susceptible as they are exposed to and absorb more heat (<a href="https://www.mtavalanche.com/node/34755"><strong><span>Bradley’s Meadow avalanche</span></strong></a>, <a href="https://www.mtavalanche.com/node/34763"><strong><span>Gallatin Canyon avalanches</span></strong></a>). Yesterday, local ski patrol snow safety teams closed terrain to manage the threat within ski area boundaries. In the backcountry, limit your exposure to problematic aspects and slopes as the snow transitions from frozen and mostly stable to wet and unstable. Move to shadier, northern aspects when the snow surface becomes saturated or you notice warning signs, such as pinwheels or small wet avalanches nearby.</p>

<p>Concern about <strong>wind slab avalanches </strong>has decreased since the last storm ended. However, triggering an unstable drift remains possible, especially on higher elevation slopes below cornices and where the snow remained cool yesterday. Look at photos of wind slab avalanches that broke naturally on Saddle Peak (<a href="https://www.mtavalanche.com/images/25/avalanche-saddle-peak"><strong>ph…;) and in Cooke City yesterday and the day before&nbsp;for examples (<a href="https://www.mtavalanche.com/node/34751"><strong><span>photo and details</span></strong></a>, <a href="https://mtavalanche.com/node/34742"><strong><span>details and photo</span></strong></a>). Avoid obviously wind-loaded slopes or evaluate the upper snowpack for instability. Signs like cracking will not be forthcoming before an avalanche occurs.</p>

<p><strong>Persistent slab avalanches</strong> are less likely, but remain a concern, particularly in the Lionhead, Southern Gallatin, and Southern Madison Ranges, and to a lesser extent, the Cooke City area. Several avalanches broke 2-3 feet deep on buried weak layers within the last week in the Taylor Fork area (<a href="https://www.mtavalanche.com/node/34722"><strong><span>avalanche 1</span></strong></a>, <a href="https://www.mtavalanche.com/node/34697"><strong><span>avalanche 2</span></strong></a>) and north of Cooke City (<a href="https://mtavalanche.com/node/34742"><strong><span>avalanche 3</span></strong></a>). Reduce your risk by selecting smaller slopes without terrain traps and following safe travel practices. Testing the snowpack before entering steep terrain will help you identify instability.</p>

<p>Each avalanche problem demands distinct management strategies, so be mindful of the most pressing threat at any given time. The avalanche danger is MODERATE in the morning but will quickly rise to CONSIDERABLE as wet snow instability intensifies.</p>

Wet slides in Gallatin Canyon

Gallatin Canyon
Northern Madison
Code
WL-N-R2-D2
Aspect
S
Latitude
45.36900
Longitude
-111.17500
Notes

In Gallatin Canyon we saw some wet slides in the chutes/gullies south of Lava Lake

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet loose-snow avalanche
Trigger
Natural trigger
R size
2
D size
2
Problem Type
Loose Wet
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Wind slabs North of Cooke City

Henderson Mountain
Cooke City
Code
SS-N-R1-D1-I
Elevation
10000
Aspect
NE
Latitude
45.05240
Longitude
-109.94500
Notes

Today we noticed these natural small wind slabs on Mt Henderson.

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
Wind Slab
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Wind Slab Avalanche on Saddle Peak

Saddle Peak
Bridger Range
Code
SS
Elevation
9100
Aspect
E
Latitude
45.79430
Longitude
-110.93600
Notes

Noticed crown and debris on drive up Bridger Canyon this morning.  Looks like a wind slab

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Problem Type
Wind-Drifted Snow
Vertical Fall
1200ft
Slab Width
200.00ft
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Understanding Avalanche Safety Preparedness – 5-Minute Survey for Motorized Users

We need your input! Eastern Oregon University is conducting a survey to better understand avalanche safety preparedness among motorized backcountry users like you. Your feedback will help us learn more about who is purchasing and practicing with avalanche rescue gear (beacon, probe, shovel) and participating in avalanche education—and why some riders aren’t.  The survey is confidential and anonymous.  

No Region, 2025-03-25

Wet Loose Avalanche Bradleys Meadow

Bradley Meadow
Bridger Range
Code
WS-N-R1-D1-I
Elevation
8000
Aspect
SE
Latitude
45.83220
Longitude
-110.92800
Notes

We skied past a wet loose avalanche that came off of the south face of Bradley‘s Meadow. It was slightly bigger than the rest of the wet snow activity that I observed during the day. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
Loose Wet
Slab Thickness
6.0 inches
Vertical Fall
200ft
Slab Width
30.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year