Observation: Little Cottonwood Canyon

Observation Date
04/27/2017
Observer Name
chester

Region:

Location Name or Route
upper lcc
Weather
Sky
Overcast
Precipitation
Moderate Snowfall
Wind Direction
West
Wind Speed
Moderate
Weather Comments
started 9:00. cold some light snow. wind wnw. but not moving snow around too much. wind picked up later am filling in skin track every 45 minutes, switched sw for a while, then back to wnw. grapul fell round 12:00 I let at 1pm, still seemed like full on winter. snow at mouth o lcc on drive out.
Snow Characteristics
New Snow Depth
10"
New Snow Density
Medium
Snow Surface Conditions
Powder
Snow Characteristics Comments
slight inversion on top 1 to 2" deep, very good riding. best of week.
Red Flags
Red Flags
Wind Loading
Red Flags Comments
Fair bit of Snow was being transported during my tour. west winds created some brand new small cornices on sub ridges from west winds (crossloading). tracks filling in rapidly (guessing 30 minutes). wind direction was s to nw but mainly wnw. max speed about 25 mph. wind slabs developing on emma ridges.
Avalanche Problem #1
Type
Wind Slab
Trend
Increasing Danger
Problem #1 Comments
Wind slabs were definitely being created today. Plenty of snow avail for transport and winds are forcasted to blow tonight too. For this reason I'm thinking pockety, manageable considerable tommorow depending on how much wind.
Comments
Storm slab seemed healed up imo. I dug 1 pit that was south facing 9700' . pit was solid, old snow new snow interface (20" down) seem glued in well( I did not dig any n pits). 2 density changes in top 6". ect neg. My thoughts and opinions are probably not real accurate. Alta was indeed closed to uphill trafic today. Thanks uac for the heads up on alta closure and recent guidance/sudo advisories which were real accurate.
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Considerable
Snow Profile Coordinates