CT in Upper Gulf of Slides Snowfields

February 22, 2019
By Kam Mitchell

2/22 snowpack notes
Slope test at 30 degrees
Test 1
CP Q2 fracture at CT12 fracture at dense facets
20cm slab
SP Q1 fracture at CT22 fracture at thin layer of facets 22cm slab ruled as stubborn slab problem
4 CM of consolidated snow followed by . . .

New wind slabs and avalanche activity

February 22, 2019
By Ryan Matz – MWAC

Relatively firm (1F-4F hardness) new wind slab on the surface with variable scouring to older surface. These new slabs were over a slightly softer and less cohesive layer, providing a structure conducive to instability, but this new layer was . . .

Huntington Ravine Snowpack

February 22, 2019
By Helon T Hoffer – Mount Washington Avalanche Center

See SnowPilot profile for snow structure. We dug down to the February 8 ice crust and did not go further. While our we did see a failure in a thin layer of graupel in the surface slab (CT11), we felt our ECTX was more representative of the snowpack . . .

Human Triggered Avalanche Lower Snowfields

February 19, 2019
By Experienced Skier

Soft very reactive slabs varying in depth between boot spur and gulf of slides

February 18, 2019
By Robert Herrick

very reactive slabs varying in depth between gulf of slides and boot spur were not everywhere but close to steep headwalls, they were very deep and very soft on top of a very stable much more dense slab.

Small skier triggered slide, Ammonusic Ravine

February 17, 2019
By Michael Griffin

Triggered a small slab over a convex roll in the slide. The slab broke over a firmer wind slab, approximately 10ft wide and ran for about 30ft.

ECTP14

February 17, 2019
By David Lottmann – Northeast Mountaineering

After CTM, Q1 results we observed an ECT14 40 cm down on a visible layer of graupel about 10cm thick (4F). The slab was P-

Gulf of slides wind slab

February 16, 2019
By Sean Murray

Ski jump test over pit, 1 foot slab with fractures extending past pit

Large avalanche in Hillman’s Highway

February 14, 2019
By Frank Carus

Observed HIllman’s runout from the Tucks trail late in the day on Thursday the 14th but wasn’t safe to approach the runout until Friday the 15th. Some blocky debris in the dogleg appeared hard but a closer look on Friday revealed mostly softer debris . . .

Natural Avalanche Evidence South of Lions Head Rock, Tuckerman Ravine

February 6, 2019
By Jeff Fongemie – Mount Washington Avalanche Center

Snow slope under and south of Lions Head Rock in Tuckerman Ravine. Broken small trees, debris heavily weathered and visually subtle. Elevation 4250 ft, slope angle 36 deg, facing 186 deg S. Timing is a guess, but may have ran during the snow-wind . . .

ABOUT THESE OBSERVATIONS

Snowpack observations are one part of the complex puzzle which is your decision to enter avalanche terrain. Some observations may include stability tests. It’s important to understand that the results of a stability tests are seldom conclusive anywhere, but particularly in snow climates and terrain like ours where the primary driver of instabilities is wind drifted snow. Many stability tests exist and each works best with specific avalanche problem types. Stability test results should never be used alone as an indication that a slope or conditions are safe particularly when more obvious red flags are present. Please use this page as part of your information gathering process, but don’t make decisions based on a single piece of information. A good article that summarizes some of the issues associated with snow and avalanche observations can be found here.

The Mount Washington Avalanche Center cannot verify the quality or accuracy of any observations that come from the general public.

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Your observations are valuable to an accurate forecast! We welcome observations from everyone. You don’t need to be an avalanche professional to submit helpful observations, just be as detailed and accurate as you can.