Wind slabs and surface conditions on the East side

March 7, 2019
By Frank Carus

Wind slabs distributed widely through the terrain and mixed in with enough hard snow to complicate booting and skinning. Clean shears observed in the new 5″ thick wind slab formed over the past day or two led a party to bail in the approach to . . .

Natural avalanches in GofS

March 6, 2019
By Sarah Goodnow

I found new debris in the bottom of Gully #1 and Gully #2. There was none in the south snowfield and I did not travel in any area north of #2. Debris in both gullies was wind affected but with some chunky wind slab evident. Debris pile in #1 was . . .

Huntington Ravine

March 5, 2019
By Jeffrey Fongemie – Mount Washington Avalanche Center

4″ of new snow overnight, several hours of W-WNW wind @ 50-70 mph. Moderate results withstability tests in the new wind slab, but overall a mix including pockets of new wind slab and old bed surface. Frozen boot prints from before this recent snow . . .

Tuckerman Ravine

March 5, 2019
By Jeffrey Fongemie – Mount Washington Avalanche Center

Moderate wind last night had a strong effect on the 4″ of new snow that fell Sunday night into Monday. We encountered a stout skin of firm wind slab over soft snow in the Little Headwall that was reactive under ski, complete with shooting cracks and . . .

Huntington Ravine, reactivity between recent layers

March 4, 2019
By Ryan Matz – MWAC

Some new slab development and small avalanche activity as of this morning, before the wind increase. Numerous D1 natural slab and loose dry slug releases, with the largest from the Northern gullies. We were able to initiate a small slab (~3” thick) . . .

Hillmen’s skier triggered Inconsequential

March 3, 2019
By Nicole Ponte

Snow started off firm on bootpack up and softened as I made progress higher. On descent, was quite soft. Saw a few others bootpacking up and was questioning my next move and side slipped to skiers left when I saw a crack propagate. Yelled avalanche . . .

Human triggered avalanches, Tuckerman Ravine Headwall

March 3, 2019
By Ryan Matz – MWAC

2 human triggered avalanches in the Headwall of Tuckerman Ravine this morning, both soft new wind slab. Chute: SS-ASu-R3-D1.5-I, Lip: SS-AFu-R3-D1.5-I. Both crown heights up to ~16”, mostly thinner. No one caught or carried.

Gulf of Slides

March 3, 2019
By Jeff Fongemie – Mount Washington Avalanche Center

~1″ of new snow overnight on WNW wind drifted to 3″ of soft snow in the GOS. Snow was light with almost enough density to keep skis from feeling the firm (P) bed surface below in most places, almost. Crampons necessary for the climb. Shiny bed . . .

Dodges Drop

March 3, 2019
By Chris Moran

New snow was reactive. Skier slough from first few turns triggered small wind slab that ran past ice bulge. 4-8″ crown, about 20ft wide. Perhaps R2 D1

Variable conditions on the west side

March 2, 2019
By Ryan DeLena

Our trip to Ammo was rather interesting today, with a fair amount of surprises. As we skinned up, snow conditions in the bushes areas below varried from step to step. We left the main drainage and began skinning up the south basin of Ammo, which . . .

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.

SUBMIT YOUR OBSERVATIONS

See an avalanche or evidence of previous avalanche activity?  Near-miss? Snowpack observations?

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.