From obs 5/2/24: "Wind load on old crust, probably from Wednesday."
23-24
Rider/skier triggered avalanche
From email 5/1/24: "Hi crew. I triggered a soft slab avalanche on the North side of Sheep Mountain today. D1.5 200’ wide ran 200’. Crown was 6-12’’ deep. I was able to ride out of it and anchor in a safe spot.
It broke on our 7th lap and we had seen no signs of instability prior to the avalanche but wind loading was occurring and obvious. The avalanche broke and on a dirty crust that formed during a rain event last week."
From email 5/1/24: "Hi crew. I triggered a soft slab avalanche on the North side of Sheep Mountain today. D1.5 200’ wide ran 200’. Crown was 6-12’’ deep. I was able to ride out of it and anchor in a safe spot.
It broke on our 7th lap and we had seen no signs of instability prior to the avalanche but wind loading was occurring and obvious. The avalanche broke and on a dirty crust that formed during a rain event last week."
Forecast link: GNFAC Avalanche Forecast for Thu May 2, 2024
Rider/skier triggered avalanche
From email 5/1/24: "Hi crew. I triggered a soft slab avalanche on the North side of Sheep Mountain today. D1.5 200’ wide ran 200’. Crown was 6-12’’ deep. I was able to ride out of it and anchor in a safe spot.
It broke on our 7th lap and we had seen no signs of instability prior to the avalanche but wind loading was occurring and obvious. The avalanche broke and on a dirty crust that formed during a rain event last week."
Weather and Avalanche Log for Wed May 1, 2024
temps teens to low 20s F this morning
See Avalanche Activity page for events after 5/1.
Signs of stability at BBowl
Toured up to Bradley's Meadow, and found about 6 inches of moderate density snow sitting on a thin M/F crust with wet snow underneath the pack.
Snow seemed well bonded and did not see any natural slides up on ridge. Not much sun was out, and it was snowing until 12 p.m.
Weather and Avalanche Log for Tue Apr 30, 2024
9" at top of Bridger
Temps in teens to low 20s F this morning
Photos of what appears like a wet slab possibly from Friday (4/26) when the precip. started after the first night or two of poor freeze (Henderson Bench). Photo GNFAC
Photos of what appear like wet slabs possibly from Friday (4/26) when the precip. started after the first night or two of poor freeze (North side of Republic near Cooke City). Photo GNFAC
GNFAC Avalanche Forecast for Mon Apr 29, 2024
<p><span><span><span><span><span><span>Over the next few days avalanches will primarily involve the recent snow and more snow that falls. Avalanches could range from fresh slabs of wind-drifted snow to wet-loose avalanches. Watch for blowing snow at ridgelines and cracking around your feet or skis as a sign that fresh, unstable drifts exist. If there is sunshine the new snow will quickly become moist and easily slide on sunny, steep slopes. Avalanches could be large, especially where there is more new snow, but even small slides can easily catch and carry you. Minimize exposure to terrain traps like cliffs, rocky outcrops and trees.</span></span></span></span></span></span></p>
<p><span><span><span><span><span><span>On Friday there were natural wet slab avalanches near Cooke City (</span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/31908"><span><span><span><strong><span…;), and skiers in Beehive Basin experienced loud collapses on a wet and unsupportable snowpack (</span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/31904"><span><span><span><strong><span…;). I skied north of Cooke City the last couple days, and on Saturday found wet unsupportable snow up to 10,000’ (</span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/31921"><span><span><span><strong><span…;). Large wet slabs, and wet-loose avalanches deeper than the new snow, are not as likely the next few days due to light freezes the last couple nights and cold temperatures in the forecast. However, there is uncertainty of how well the snowpack froze below the new snow, and conditions could change quickly if there is more sunshine and warmth than expected. If you find a wet unsupportable snowpack, or the sun comes out and starts to melt the snow surface, seek lower angle or colder slopes.</span></span></span></span></span></span></p>
<p><span><span><span><span><span><span>Lower elevations are showing dirt and grass, but snow in the mountains means avalanches are possible. Remain diligent with careful snowpack assessment and route-finding, and carry proper avalanche rescue gear. </span></span></span></span></span></span><span><span><span><span><span><span>The variable and quickly changing spring weather creates a mix of avalanche concerns to watch for. The snowpack can change drastically from day to day, throughout the day, and across different aspects and elevations. Carefully evaluate the snowpack throughout the day, and have alternate plans in case you find unstable snow. See below for general spring snowpack and travel advice.</span></span></span></span></span></span></p>
Give Big Gallatin Valley is May 2-3, 2024.
On May 2-3, please support the excellent non-profits of Gallatin County, including the Friends of the Avalanche Center (GNFAC Giving Page HERE