Storm slabs

January 20, 2019
By Ben Allen

The photos are from the bill hill glades in gorham. I got whoops all morning and got those two small test slope to slide. Today 1/21/19 we tried a line in the kanc. On the skin in we got several whoops, lots of cracking and slumping. The slab verried . . .

Monroe Brook, variable snowpack

January 18, 2019
By Ryan Matz – MWAC Forecaster

A high degree of spatial variability in the snowpack, with the 4200-4800’ elevation section now a well developed avalanche path due to an avalanche last week and subsequent reloading.
We found a mix of soft (4F-F) and hard (1F) slabs as a snow . . .

Avalanche Observation, Monroe Brook

January 18, 2019
By Helon Hoffer – Mount Washington Avalanche Center

We ascended and descended Monroe Brook today. Upon reaching 4200′ in the gully proper, we found avalanche debris from within the past week or so. We turned around under 5000′. Our guess is that the the start zone we could see around 4800′ was where . . .

Dec. 22 crust as a bed surface and Great Gulf avalanche activity

January 14, 2019
By Ryan Matz – MWAC Forecaster

Avalanches occurred on a number of bed surfaces during and following last week’s storm, but several appear to run on the Dec. 22 crust which is easily identified by being close to impenetrable. The deepest bed surface currently visible in Tuckerman . . .

Avalanche Debris – South Snowfields, Gulf of Slides

January 14, 2019
By Jeff Fongemie – Mount Washington Avalanche Center

Observed wind scoured avalanche debris at the South Snowfields in the Gulf of Slides from avalanche activity that likely occurred during the Jan 9-10 storm. The debris field is impressively large, and completely buried the many of the 6 foot tall . . .

Tuckerman Ravine, post wind event

January 13, 2019
By Ryan Matz – MWAC Forecaster

Varied snow surfaces and upper snowpack, all heavily wind affected. A number of crowns visible, as in photo. Snow surface generally firm (1F), and the sastrugi in the floor of the ravine is as big or bigger than it looks in the picture.
Moderate to . . .

Huntington Ravine photos

January 13, 2019
By Ryan Matz – MWAC Forecaster

Notably less storm snow deposited/remaining in Huntington Ravine. Avalanche path development resembles pre-storm conditions.

Avalanche in Center Bowl, Tuckerman Ravine

January 12, 2019
By Ryan Matz – MWAC Forecaster

Naturally triggered, suspected to have occurred yesterday or last night (1/11-1/12). Visually observed from Hermit Lake. Crown width approximately 300’, height approximately 12”.
HS?-N-R2-D2-S

Avalanche in Gulf of Slides

January 12, 2019
By Rob

looks like a recent slide, maybe a day or two old.

Observation of snowpack on South Facing slope around 3500′

January 12, 2019
By Mason Irish

Pit Location was around 3500′. Results were ECT N. The layer of concern was a thin layer of small facets (4finger-Fist hardness) resting on the Christmas freezing rain crust. The snow pack, about 24″ deep, above this facet layer was right side up . . .

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.

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