Avalanche: Logan

Observer Name
David Tidhar
Observation Date
Sunday, December 19, 2010
Avalanche Date
Sunday, December 19, 2010
Region
Logan
Location Name or Route
Elevation
Unknown
Aspect
Slope Angle
30°
Trigger
Natural
Avalanche Type
Soft Slab
Weak Layer
New Snow/Old Snow Interface
Depth
8"
Width
Unknown
Vertical
Unknown
Comments

skiing 8500-~7500' Bear River Mtns - cautious skiing and route finding in difficult trail breaking conditions. rain below ~7000" dense snow falling above. light ridge winds we witnessed evidence of natural slide activity on slopes of >30 degrees. slides appeared generally shallow (<6") though one crown face appeared from above to perhaps be 1' deep; having run perhaps 100 meters. we triggered a small 4-6" deep slide comprised of wind slab after dropping a small cornice piece along a wind exposed ridge. lateral propagation was small and the slide ran only a short distance due to concave slope. impressive north facing cornice build up with impressive elasticity snow density was heavy with a few pockets of moderate density snow in the trees on NW aspect. Very heavy rain below 7000 with snow extremely saturated at elevations around 5000-6300' perhaps some hoar and light density snow layer sitting atop the rain crust from last weekend.

High today; Moderate to High tomorrow depending on weather and temperature today.

Coordinates