Observation Date
4/1/2014
Observer Name
Greg Gagne
Region
Salt Lake » Big Cottonwood Canyon » Silver Fork » Meadows
Location Name or Route
Meadow Chutes
Weather
Sky
Obscured
Precipitation
Moderate Snowfall
Wind Direction
Southwest
Wind Speed
Moderate
Weather Comments
Winds were stronger early in the morning out of the S/SW. Occasional bursts of S1 snowfall.
Snow Characteristics
New Snow Depth
10"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments

About 25-30 cms (10-12") storm totals, with locally higher amounts where it was drifted. Density inversion within storm snow particularly sensitive early morning. Some shallow, soft wind-drifted snow on leeward aspects from the SW winds. Noted cracking within storm snow. On all but due north, dust-on-crust.

Red Flags
Red Flags
Cracking
Red Flags Comments
Cracking is certainly a red flag, but the weakness was a density inversion that had largely settled out by the time we were exiting Meadow Chutes at noon.
Comments

Morning tour in Meadow Chutes with density inversion sitting 5-10 cms (2-4") above old snow surface as the weakest layer. Some cracking within storm snow, especially where there was fresh wind-drifted snow. At 0830 I was unable to isolate a column on a steeper test slope, however when exiting at noon, I could easily isolate columns on similar test slopes, so it appeared density inversion had largely settled out by mid-day. Most of the aspects we were traveling on were E/SE where the storm snow was sitting on a 5 cm supportable crust with damp grains beneath. No collapsing and the only hazard I was leery of were fresh wind drifts. In that scenario, there was

- bed surface (old crusted snow surface;)

- weak layer (lighter density snow sitting just above bed surface;)

- slab (fresh wind drifts.)

However wind drifts were shallow (at most 5-10 cms) and not that widespread. Ski cuts on suspect terrain were quite effective at mitigating this hazard.

Exiting Meadows was able to look at some northerly terrain between 9000' - 9600' and like what others have been reporting, there is spatial variability. On the northerly aspects there are several crusts in the top 50-75 cms of the snowpack, with DF's (and possibly some faceted snow) sandwiched in between. At the elevations where we were traveling there wasn't enough of a new load to activate these buried weaker layers, but it may be a different story on northerly aspects in upper elevation alpine terrain where there has been more wind loading. Certainly a structure worth watching during this hopefully prolonged stormy spell.

Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate