Soft slab release

February 10, 2020
By Ben Allen – Acadia mountain guides

Soft slab avalanche off of the ice bulge in the top of the line. The trigger was intentional. The snow ran 200-400 vertical feet. After side steeping the breakable crust the debris pile skied quite well. The photo is looking back up the slope that we . . .

Avalanches in Huntington Ravine

February 9, 2020
By Helon Hoffer – Mount Washington Avalanche Center

Main photo: Standing in the debris of Odell looking up into Odell
Second Photo: Standing under Odell looking at the Fan with debris having come out of Pinnacle
Third Photo: Looking at South Gully from the floor of the ravine
It appears an avalanche . . .

Wind slabs, upside down snow structure in Huntington Ravine

February 9, 2020
By Jeff Fongemie – MWAC

First clear day after snow event Thursday and Friday. Overall, snow surface is a mix of finger to pencil wind slabs up to 50cm thick, and also to a much lesser extent exposed melt freeze crust that formed during the February 6-7 storm. This 1cm . . .

Snowpack Profiles and Testing Between Lobster Claw and Right Gully

February 9, 2020
By Al Mandell/Chris Bartram/Ivo Mandalski – Acadia Mt Guides

Snowpack assessment at the base of Lobster Claw/Right Gully. Elevation = 4405, Aspect SE. Test results: CTM(12)SCQ1,26cmdown, 1 mm facets. CTM(18)SCQ1,26 cm down, 1mm facets. ECTN25 Nonplaner Break, Q3 (26 cm down).

Shooting Cracks on Mt. Willard

February 6, 2020
By Nick Aiello-Popeo – Synnott Mountain Guides

Today at 2,400 feet on an eastern aspect of Mt. Willard the snow exhibited shooting cracks and tiny human-triggered slab avalanches (see photos). This was most evident in slough piles below gullies and cliff faces. Though there only seemed to have . . .

Freezing rain in Tuckerman Ravine

February 4, 2020
By Joseph Soccio – MWAC

We headed into right gully to investigate any potential wind slabs that formed overnight. Blowing snow had ceased as we started our field day around 1000 AM. Wind slabs were unreactive and averaged 6 inches in depth. Our test pits revealed multiple . . .

Bowl Report – 2020-02-02

February 2, 2020
By Mark Renson – AIARE Acadia Mtn Guides

Instructed an AIARE 1 for Acadia Mountain Guides. Saw what appears to be evidence of a recent small slab release below the buttress between Right Gully and Lobster Claw. See circled in red in the attached pic.
Did some tests on N aspect of Bowl at . . .

Calm Weather 1/31 to 2/2

February 2, 2020
By Tyler Falk – East Coast Avalanche Education

Overall calm and unseasonably warm temperatures the last 72 hours in the alpine. The combination of sun and warm temperatures Friday on Southeast aspects at and below 4k softened the snow surface which then locked it up in those locations this . . .

General observations – west side, summit and Oakes

January 31, 2020
By Andy

*Large grain (5 to 6+ mm) facets on snow surface below tree line on the west side
*Mix of crust and soft, chunky wind affected snow in east snowfields- did not ski very well
*Soft (4F / F) wind slab of varying depth on rain crust in Oakes (~4800 ft, . . .

Huntington Ravine

January 30, 2020
By Bo Willoughby

Checkerboard of ice crust and firm windslab. The gully’s appear scoured in places and loaded in others.


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.


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.