Photo: GNFAC
Forecast link: GNFAC Avalanche Forecast for Sun Apr 14, 2024
Photo: GNFAC
Natural cornice failure and small slab on Iceberg Peak’s NE face. We skied by the day prior and judging by what the wind did to our tracks overnight, this looked like it happened in the morning.
Rode from Buttermilk to Lionhead Ridge to take down the weather station for the season. The snowpack was fully saturated and sloppy at lower elevations. By 8000 ft there was a firm crust with a couple inches of wet snow above it around noon. Winds were breezy at ridgetops, keeping the snowpack a bit cooler (but still getting wet). Ominous clouds moved in around 12:30 pm. We quickly left before getting rained on.
We saw no signs of recent avalanches.
<p><span><span><span><span><span><span>By mid-morning, on sunny slopes, any surface crusts that formed overnight will be breaking down and wet avalanche danger will be rising. Mostly we’re expecting relatively small wet loose slides (</span></span></span></span></span></span><a href="https://www.mtavalanche.com/images/24/wet-loose-avalanches-argentina-bo…;), but the whole array of wet snow avalanche concerns are possible today, including wet loose slides entraining the whole season’s snowpack, wet slabs (</span></span></span></span></span></span><a href="https://www.mtavalanche.com/images/24/fin-cooke-city"><span><span><span…;), or cornice collapses (</span></span></span></span></span></span><a href="https://www.mtavalanche.com/images/24/cornice-collapse-sphinx"><span><s…;).</span></span></span></span></span></span></p>
<p><span><span><span><span><span><span>Clouds may move in this afternoon and strong winds may delay melting in some areas, but spring weather is fickle and neither of those are guarantees of safety. Plan to get off sunny slopes early. Pay attention to the snow surface to know when dangerous conditions have developed on a particular slope. If you’re sinking past your boot tops in wet and slushy snow or you see rollerballs and small wet snow avalanches starting it’s time to move to cooler aspects or return to the trailhead before conditions deteriorate further. </span></span></span></span></span></span></p>
<p><span><span><span><span><span><span>Triggering avalanches in dry snow is becoming less likely, but is still possible, particularly on wind-loaded, high elevation, shady slopes. On Wednesday, skiers in the northern Gallatin Range triggered some wind-loaded pockets breaking 6-8” deep (</span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/31812"><span><span><span><strong><span…;). Watch for shooting cracks as a clear sign that a wind drift hasn’t yet bonded. Before committing to steep slopes take a few minutes to stop, dig and test the upper couple feet of the snowpack to keep from getting surprised. Avalanches breaking deeper are much less likely, but it’s still good to keep the possibility in the back of your mind.</span></span></span></span></span></span></p>
<p><span><span><span><span><span><span>The avalanche danger is MODERATE this morning and will quickly rise to CONSIDERABLE as the day heats up.</span></span></span></span></span></span></p>
Hyalite Road Closure: Hyalite road is closed to ALL MOTORIZED VEHICLES until the morning of May 16. This is a regular annual road closure to reduce road damage during the spring thaw. Bicycle and foot traffic are allowed. Contact the Bozeman FS Ranger District for more info.
Temps didn't drop below freezing overnight
Skiers unintentionally triggered this cornice above the south face of the Sphinx. No one was caught. Photo: Anonymous
Riders saw several natural wet snow avalanches while riding on the west side of the Crazy Mountains. The largest of these was 500' wide, D2. All these avalanches happened in the upper 40cm of the snowpack.
Riders in the Crazy Mountains saw several small wet loose avalanches during their travels today. Many of them were on south-facing terrain. Photo: Anonymous
Rides saw this large avalanche in the Crazy Mountains on an east-facing slope. This avalanche broke 500 ft wide and 40 cm deep. Photo: Anonymous