UDOT PLANNED AVALANCHE CLOSURES!!

Avalanche: Chalk Creek

Observer Name
Bill Nalli
Observation Date
Sunday, February 24, 2019
Avalanche Date
Sunday, February 24, 2019
Region
Uintas » Upper Weber Canyon » 1000 Peaks » Chalk Creek
Location Name or Route
Upper Mill Fork Chalk Creek
Elevation
10,300'
Aspect
Northeast
Slope Angle
39°
Trigger
Natural
Trigger: additional info
Cornice Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Depth Hoar
Depth
8'
Width
200'
Vertical
700'
Comments
We saw this large HS-NC-R2,D3-O from El Diablo Peak this morning at 09:15. Judging by the lack of new or wind blown snow on the bed surface it likely happen sometime late last night or early this morning from the increased SW wind. It is located on a NE aspect at 10,300' at the upper reaches of Mill Fork of Chalk Creek.
Comments
When zoomed in you can clearly see the missing piece of cornice and the depth of the slab. This slide is another repeater which last ran late January. It looks to have once again failed on the upper most layer of depth hoar that was not cleaned out during previous slides. This continues to be a theme with many of the large events in the Uintas this winter. Each event is failing at a deeply buried, relatively strong layer of facets but not eliminating them. Much weak snow remains in the bed surface and the combination of advanced facets and thin snowpack continues to provide the recipe for big delayed action avalanches. It has been over one week since the last significant new load to the pack and we are still seeing big slides initiated by big triggers.
Coordinates