Avalanche Forecast
Avalanche Bulletin - Little Yoho
15cm of snow in the forecast for the Little Yoho region. Watch to see how the new snow is bonding, and dig down to see if the persistent layer is present and how its bonding to the snow above.
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Be cautious with convexities and steep slopes on solar aspects.
Avalanche Problem 2: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Previous wind slabs are still present in alpine regions but have been losing sensitivity. New snow in the forecast will bury these and may form smaller ones near ridge crests.
Travel and Terrain Advice
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
Avalanche Summary
In the last few days, there was a skier accidental avalanche at Sentinel Pass, and another 2.5 avalanche on the S side of Isolated Col in Little Yoho. Both avalanches were in the alpine on solar aspects, and failed on the March 15 crust persistent layer that has been sensitive to skier triggering for a couple of weeks.
Snowpack Summary
Trace amounts of new snow in the past 24 hours. Last week's storm brought 15-40cm with moderate S and W winds creating wind slabs in the alpine. The March 15 suncrust is down 25-50cm on south-east through west aspects and has been sensitive to skier triggering over the last few days.
Weather Forecast
Cloudy with light snow overnight into Sunday. We should see 15+cm with West winds dipping into the moderate range. Some warming is expected early next week.
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Dig down to test the bond to the Mar 15 crust, bearing in mind that the bond can vary significantly with subtle changes in slope aspect and steepness. Forecasters suspect this problem is developing with faceting on the crust due to recent cold temps.