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Xtra hard force for that propagation
Location Name:
BNSF Avalanche Safety - Running Rabbit Mtn. GNP
Observation date:
Wednesday, February 12, 2020 - 22:15
Is this an Avalanche Observation:
No
Observation made by:
Public
Tabs
Quick Observation
Toured up the Shed 10.7/ 11 ridge to the Shed 11 weather station at approximately 6300’.
Then continued to the starting zone elevation of Path 1163 at approximately 7200’.
Descended Shed 10.7 path.
Objectives were to:
Perform a welfare check on the Shed 11 Weather Station and attempt to get wind sensor working again.
Continue to upper starting zone elevation of Path 1163, check on conditions and look for any recent avalanche activity.
Also conduct a full profile adjacent to Path 1163 on a slope with similar aspect, elevation, and slope angle as the avalanche path starting zone.
No recent avalanche activity was observed.
No wind-loading occurring throughout the day.
Eight inches (8”) and up to two feet (24”) of accumulated snowfall now resting on 2/1/2020 crust.
The 2/1 crust extended up to our high point at 7200 feet where it had thinned to less than 1 inch (2 cm) thick.
Wind slabs from yesterday and earlier up to 1F- hardness established in wind affected areas… mostly observed on easterly through southerly aspects. Minimal cracking with ski cuts on these slabs.
No collapsing or audible failures observed.
Full profile conducted on ridge just west of Path 1163 (pit profile below)
Profile location was on a southeast aspect, 7100 feet elevation, 38-degree slope.
Total snowpack depth at profile location was 72” (180 cm).
Stability tests were limited to one (1) Extended Column Test. Non-propagating results in the upper 20 inches within the standard 30 taps. But propagation (ECTP35 @25 cm) with extra hard force on a layer of facets above a crust near the bottom of the snowpack. After propagation the column slid into the pit.
Cloudy to partly cloudy skies for the entire field day with excellent visibility at all elevations.
Minimal precipitation throughout the day with calm to light wind conditions at all elevations.
Air temperatures were in the teens and twenties (0F) at all elevations throughout the day.
Snowpack, Avalanche, Weather Images:
Travel Details
Region:
Flathead Range/Glacier National Park - John F. Stevens Canyon
Activity:
Skiing