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Forecast for the Logan Area Mountains

Toby Weed
Issued by Toby Weed on
Thursday morning, December 9, 2021
The avalanche danger is MODERATE. Heightened conditions exist, and avalanches of new snow are possible at upper elevations on slopes facing northwest, north, and east. People could trigger avalanches where westerly winds are creating sensitive drifts on steep slopes in exposed terrain.
  • Remember to always follow safe travel protocols. Go one person at a time in avalanche terrain, while the rest of your party watches from a safe area.
  • Check your avalanche rescue equipment, change your batteries, and practice often with your backcountry partners.
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Weather and Snow
Finally, snow is falling in the Bear River Range, with around 4 inches of accumulation early this morning on upper elevation slopes in the Logan Zone. Mountain snow will continue today through tonight and into tomorrow, with 7 to 13 inches of additional accumulation possible on upper elevation slopes by tomorrow evening. Moderate west winds are certainly strong enough to drift the new snow into sensitive wind slabs at upper elevations.
At the highest elevations in the Logan Zone, the new snow is falling on few inches of loose sugary faceted snow capping a very hard rain-crust from mid November. Sunny slopes up high and most terrain at mid and lower elevations were still bare of snow before the storm.
A few inches of sugary faceted snow is capping a slick and solid rime ice-crust at upper elevations in the Central Bear River Range.
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Avalanche Problem #1
New Snow
Type
Location
Likelihood
Size
Description
  • People could trigger small avalanches at upper elevations, especially in exposed terrain where winds are creating drifts.
  • ​​​​​​As is usual during periods of dry weather, the old snow surface became quite varied across terrain. In shady, or mostly north facing areas up high, a hard rain-crust dominates the shallow snowpack structure. In some areas this is likely to be a problem, a smooth and slick bed surface with a couple inches of very loose sugary snow on top of it.
  • Avalanches might run further and faster than expected, and could be dangerous due to very shallow snow conditions.
Additional Information
  • Be very careful, keep your speed down, and stay in control. Encounters with shallowly buried rocks or down trees in the early season have led to many season-ending injuries.
  • The Tony Grove Road is not maintained for wheeled vehicles in the winter season.
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