Manto nivoso

Gunnison

Zach Guy and Eric MurrowGunnison
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Foto de la observación 1Foto de la observación 2Foto de la observación 3Foto de la observación 4Foto de la observación 5Foto de la observación 6Foto de la observación 7Foto de la observación 8

Weather

Cloud cover increased to thin, broken skies with a greenhouse effect. Mild temps, calm winds. wind loading: none; recent snowfall (cm): 0

Snowpack

Several tests on NE aspects, both in sheltered terrain and previously windloaded terrain showed non-propagating results on the 3/3 interface, which was small grained (<.5mm) rounding facets.  Slabs were about 25 cm below treeline and about 45 cm below ridgeline, up to 4F hard.  The 2/8 interface produced propagating results with additional loading steps (foot stomps) under a 70 cm hard slab up to 1F.  See profile.   Variable snow surfaces are generally small-grained facets (<.5mm) on shady north aspects, with larger-grained (up to 1 to 1.5 mm) near-surface facets on NE aspects and larger-grained (up to 1.5 - 2.0 mm) radiation recrystallization facets on the north half of E aspects to a sunnier NE aspects.  The southern half of the compass held mature wet grains at the snow surface.  . No recent avalanche activity or signs of instability underfoot.