Front Range
SnowpackSpencer Logan · May 2, 2013 · Front Range
Weather
Few clouds in the early morning, building to low, broken clouds and brief snow showers around 11:00. Winds light from north-northeast. Air temps remained below freezing through the morning, and with broken skies only the top few centimeters of snow was turning moist.
T0: -9 (shade)
T20: -5
T35 (top of dusty crust): -1.5
HST 30-35 cm, about 8 cm overnight.
T0: -9 (shade)
T20: -5
T35 (top of dusty crust): -1.5
HST 30-35 cm, about 8 cm overnight.
Snowpack
Storm snow well-bonded to the old snow surface.
Light to moderate north and northeast winds drifted a bit of snow near and above treeline. Drifts were still very soft and several feet deep.
Loose-snow avalanches easy to trigger on slopes steeper than about 40 degrees. Several L-N-R1D1.5-S ran quite far vertically on southerly aspects. Those were much larger than results from CDOT's mitigation on northerly aspects.
Cool air temperatures and increasing clouds tempered the melting at the snow surface. Upper few cm were moist by 10:00. By 10:30, I was able to trigger small storm slabs running on the dusty crust, on very steep SE test slopes.
Still possible to find areas with depth hoar on northeast and north aspects near treeline. Grains are rounding but still poorly bonded. Old snowpack on southeast aspects is all well-bonded rounds.