Observation: Snowbasin Backcountry

Observation Date
3/5/2019
Observer Name
Bill Hunt
Region
Ogden » Snowbasin Backcountry
Location Name or Route
Snowbasin backcountry
Red Flags
Red Flags
Rapid Warming
Red Flags Comments
There were a few rollerballs starting around 11AM, although we were generally in north-facing trees, some smaller aspects were more SE and S and catching sun. Looked at the Ski Tracks app and was surprised at how low we were, around 6300', heading into the exit trees. The March sun is ruthless on anything getting sun-hit; certainly agree with the forecast today for the sunny slopes. Also observed a large glide crack that had formed on a steep, rock-slabby face, around 7200', NE aspect.
Comments
Wind out of the SE was certainly transporting snow up high, 8800-9000' had 6" drifts, just minor cracking but something to keep an eye on tomorrow. Below, cuts at the top of a steeper entrance (mid-40 degrees), 7800', NNW, produced a surface sluff that ran about 400 feet. There was 6" of light snow over a heavier base, almost crusty feeling on skis or snowboard, but not a hard crust in a hasty pit, more like 4 fingers hard. If there has been any rain at that elevation, the crust seems to have sublimated a bit to soften it, improving turn-ability a bit. Lower angle slopes turned better. Firm enough underneath that there did not seem to be any deep slab issues, just the top layer, which responded to cuts. Next, a log in the middle of an open bowl, thankfully visible and avoidable. Next, a cut of this bowl produced more sluffs, visible in foreground. The glide crack mentioned is visible (sort of, apologies for the low-res photo) on the slope in the distance, below the left sub-peak, above the near trees. Next, old rollerballs under the newer half-foot of snow became more abundant and harder the lower down we went. Photo is 7000', NW aspect. At least the base was stable, although I am concerned about the effect rain may have in the next storm cycle, on the north aspects. Below 7500' has already had some rain and rollerballing, so its somewhat stabilized, although more rain will ruin fairly decent turning conditions that exist down to 6000' or so. If the rain goes above 7500' there could be rollerballing and wet activity above 7500', as high as the rain goes. If the rain line stays around 7000' then conditions will improve in the 7000' to 7500' elevations, rather than deteriorate, which would be very helpful. Below 6400', it sounds like we will get more rain than snow, so I'd be prepared for a longer walk out, or try to stay in the 7500-8800' range where the snow is the best. With the wind as strong as its been, above 8800' tends to be more windhammered.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Moderate