Medicine Bow Nordic Ski Patrol
Patrol Log: Sunday, January 23, 2000:
M. Allen
23 Jan 00, 9:30 am - 2:00 pm, Snowy Range. Skied from Green Rock parking
area to Bear Lake via Sally Creek, then back to Green Rock via upper Libby
Creek trail. Cold temperatures and a layer of new powder made skiing
conditions excellent. Dug a snowpit at Bear Lake and recorded the following
data.
Time: 1230 23 Jan 00.
Location: North shore of Bear Lake.
Weather: Windy, about 20F, with light precipitation. Pit location
was sheltered and sunny.
Aspect: 20 degrees, south-facing
----------------------------------------------------------------------------
Depth (cm) Hardness Grain size Shovel Shear Comment
0---------------------------------------------------------------------------
Fist < 1 mm New powder
44--------------------------------------------------------------------------
1 Finger 1 mm Hard, old surface
49-------------------------------------------Easy!--------------------------
Fist 1 mm Loose crystals
62--------------------------------------------------------------------------
2 Finger < 1 mm Consolidated slab
137-------------------------------------------------------------------------
Fist > 1 mm Depth hoar
155========== G R O U N D ==================================================
Interpretation: In the long run, the new snow deposited during the last
week should help reduce the avalanche risks associated with the depth hoar
layer that prevailed during December and early January. But in the short
run caution is still a good idea, especially on steep slopes. The layered
structure of the snowpack at Bear Lake indicates that the favorable
equitemperature metamorphosis is incomplete at best. Also, moderate to
strong winds have loaded lee (eastern) slopes, and where the snowpack is
shallow it's still possible to hear the "whumpfing" sounds associated
with instability. Examine the snowpack before venturing on slopes greater
than 25 degrees.
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Page last modified January 24, 2000
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