Observation: Flagstaff Ridge

Observation Date
04/27/2017
Observer Name
Redd

Region:

Location Name or Route
Flagstaff S face
Weather
Sky
Obscured
Precipitation
Moderate Snowfall
Wind Direction
North
Wind Speed
Light
Snow Characteristics
New Snow Depth
10"
New Snow Density
Medium
Snow Surface Conditions
Powder
Snow Characteristics Comments
10" from the Wednesday storm, 14" of settled snow under that from the Sunday Monday storm. Very icy but well bonded 4mm grains under that.
Red Flags
Red Flags
Recent Avalanches
Heavy Snowfall
Wind Loading
Cracking
Red Flags Comments
Weak layer of most concern was the fist hard snow in the middle of 4f top and bottom in the newest snow layer, 4 to 6 inches down. It would readily fail in that zone, but was non planar and very low energy.
Avalanche Problem #1
Type
Storm Slab
Trend
Decreasing Danger
Problem #1 Comments
The top 4 to 6 inches cracks easily. Noted one small natural slide that failed at that depth. Graupel was coming down at least from 6:30 to 8am when we got off the hill. Light and about 3 to 4 mm in diameter. It was pooling and getting pushed around by the wind.
Snow Profile
Aspect
South
Elevation
9500
Slope Angle
37
Comments
HS 220cm ECTN1 at 10cm Low energy, non planar (soft layer in middle of the new storm snow) ECTN4 at 25cm Low energy, non planar (new/old snow interface) ECTN19 at 60cm Low energy, planar (Sun/Mon storm new/old interface
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Snow Profile Coordinates