Observation: Alexander Basin

Observation Date
2/17/2019
Observer Name
Grainger
Region
Salt Lake » Mill Creek Canyon » Alexander Basin
Location Name or Route
Alexander Basin
Weather
Sky
Obscured
Precipitation
Light Snowfall
Wind Speed
Calm
Weather Comments
Winds calm through much of the day with shifty S-through-E terrain winds increasing around 1400 with beginning of S-1 snowfall. Clear morning led to bands of cloud cover and finally obscured skies as snow began and increased PI around 1700.
Snow Characteristics
New Snow Depth
5"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments
New snow noted is from 2/15 Friday overnight. Ranging from 1" to 6" in areas at 9400', observed very little slab characteristic in this layer and snow sloughed within itself rather than at the interface. That being said, some longer-running natural sloughs observed in Depth Hoar Bowl running past the concavity (Pic 1), possibly from Friday night's PI and wind. Thursday's rain crust was present below ~8400' and prominent on S and W windward slopes. Thursday night's higher density snow and graupel have adhered well to older snow in many areas and in the usually-scoured and fluted W-facing Alexander/Pole Canyon ridgeline have flattened the terrain out noteably.
Cornices here are mature and the growth in the last 2 weeks is apparent in their layering (Pic 2 & 3). Though proportionately more growth on the N-facing than E-facing, all have grown and are worth knowing the earth ridge location and/or staying conservatively back from.
Red Flags
Red Flags
Wind Loading
Avalanche Problem #1
Problem
Wind Drifted Snow
Trend
Decreasing Danger
Avalanche Problem #2
Problem
Cornice
Trend
Same
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Coordinates