24-25

<p><span><span><span><span><span><span>Today’s transition between colder, snowy weather and warm, sunny, springlike weather bring a range of concerns.</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>While winds have generally been light, </span></span></span></span></span></span><span><span><span><strong><span><span>Wind Slab avalanches</span></span></strong></span></span></span><span><span><span><span><span><span> are a concern in places where winds have drifted and slightly stiffened the recent snow. Look for these drifts below cornices and near ridgelines. With east winds in the Bridger Range, there may be drifts in some unusual locations, so be particularly watchful there. Over the last couple days, thin, relatively small, wind slabs have been reported in the </span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/34832"><span><span><span><span><span><… Range</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span>, </span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/34824"><span><span><span><span><span><… Basin</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span>, and the </span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/34826"><span><span><span><span><span><… around Cooke City</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span>. Looking for wind textured surfaces and avoiding drifts is the easiest way to deal with this problem.&nbsp;</span></span></span></span></span></span></p>

<p><span><span><span><strong><span><span>Dry loose avalanches </span></span></strong></span></span></span><span><span><span><span><span><span>(sluffs) can pack a surprising punch and there is plenty of soft snow for them to entrain. Don’t underestimate their power if you’re getting onto steeper slopes.&nbsp;</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>As soon as direct sunshine hits slopes today </span></span></span></span></span></span><span><span><span><strong><span><span>wet loose avalanches </span></span></strong></span></span></span><span><span><span><span><span><span>will become the big player. Today will be the first time the recent snow gets wet. This initial wetting is often the peak of instability for wet loose avalanches. With lots of recent snow, these could be quite big slides and they’ll run a long way on last week’s crusts.</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>Temperatures are warmer and it’s going to be sunnier around West Yellowstone, Island Park, and Cooke City this morning, so the onset of these wet loose slides will be earlier in those places. Near Bozeman and Big Sky, there is more new snow but temperatures are cooler and clouds should stick around for longer, so it’ll take longer for things to get going, but once they do, we could see bigger avalanches.</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>Be on alert as soon as the sun is not blocked by clouds. The snow surface getting sticky and wet and rollerballs rolling down hill are your clues that it’s time to move to shadier or less steep slopes.&nbsp;</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>With a range of concerns to watch for and large avalanches possible, the avalanche danger is MODERATE today.</span></span></span></span></span></span></p>

<p>&nbsp;</p>

<p><span><span><span><span><span><span>The Bridger Range received the most snow totaling about 20 inches, and yesterday the Bridger Bowl Ski Patrol was still able to trigger some soft slab avalanches 12-16 inches deep in pockets, but generally the new snow had begun stabilizing.</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>Winds have been minimal, but places near the ridge under cornices that received some drifting will still be the most likely places to trigger a </span></span></span></span></span></span><span><span><span><strong><span><span>soft wind slab</span></span></strong></span></span></span><span><span><span><span><span><span>. The odds of triggering a </span></span></span></span></span></span><span><span><span><strong><span><span>storm slab avalanche</span></span></strong></span></span></span><span><span><span><span><span><span> on a slope without any drifting have gone down a lot, but there will still be </span></span></span></span></span></span><span><span><span><strong><span><span>decent sluffing</span></span></strong></span></span></span><span><span><span><span><span><span> in the steepest terrain.&nbsp;</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>I’d feel comfortable getting into steep terrain today, but I’d avoid spots where winds previously drifted snow, and I’d choose slopes with a runout free of rocks or trees in case I triggered a small pocket of storm snow. Today the avalanche danger is MODERATE.</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>Avalanche conditions are generally safe with minimal wind limiting wind slab formation, and cool temperatures and clouds today preventing wet snow problems. Ian and Dave found stable snow yesterday&nbsp; </span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/34822"><span><span><span><span><span><… Buck Ridge just south of Big Sky</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span>.</span></span></span></span></span></span></p>

<p><span><span><span><strong><span><span>Two avalanches yesterday</span></span></strong></span></span></span><span><span><span><span><span><span> are great examples of what to look for today. A group </span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/34824"><span><span><span><span><span><… Beehive Basin just north of Big Sky</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span> found stable snow in steep terrain except for one pocket in a couloir where winds had stiffened the new snow. They triggered but were not caught in a soft slab avalanche about 6 inches deep and 60 feet wide. Another group </span></span></span></span></span></span><a href="https://www.mtavalanche.com/node/34826"><span><span><span><span><span><… Cooke City</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span> triggered a soft wind slab 6-10 inches deep and 40 feet wide.</span></span></span></span></span></span></p>

<p><span><span><span><span><span><span>Be on the lookout for isolated places where winds have drifted snow and where you could trigger a soft wind slab. Be especially cautious in terrain where simply falling could be dangerous. A tragic accident </span></span></span></span></span></span><a href="https://www.mtavalanche.com/accident/15/04/15"><span><span><span><span>… years ago in April on Beehive Peak</span></span></u></span></span></span></span></span></a><span><span><span><span><span><span> is worth reading about and learning from. Today the avalanche danger is LOW. </span></span></span></span></span></span></p>