Snow Pit in Huntington

March 5, 2020
By Austen Bernier/Pete Grzesik

No observed natural avalanche activity. Lots of loading in South, Central, and the Fan.
We performed a number of tests in a pit on a 26deg slope on a SE aspect, finding 60cm or so of upside down wind slab on a crust. A second crust, (perhaps two . . .

Oaks gulf

March 3, 2020
By Ben Allen – Acadia Mountain Guided

We encountered an up right slab varying from 10cm to 40cm it was well bonded to the old ice crust. Under the ice crust was a 2-4cm layer of 4F .5mm grains. They were dry, but easy stuck together to create a snow ball. Pole probing showed a pretty . . .

NNE & SSE Aspects on Boot Spur

March 2, 2020
By Jeff Fongemie – MWAC

We climbed a long snow gully left of Dodges Drop in Tuckerman Ravine to the Boott Spur ridge, looking for wind slab formation out of curiosity as this slope has a similar aspect as Escape Hatch in Huntington Ravine, which avalanched naturally during . . .

Willey’s Slide Unstable Snow

March 1, 2020
By Alex Fischer

Partway up Willey’s Slide, we saw a large shooting crack (approx. 50ft long) form where we were standing in the snow below an ice bulge, so we decided to bail. The snowpack was variable and included sections of firm scoured snow, sections of soft . . .

Avalanche Activity 2/27 Storm

February 29, 2020
By Jeff Fongemie – MWAC

The 9.5″ of 17″ snow on 2/27/2020 with wind from the ESE then W produced a number of natural avalanches.
-Escape Hatch in Huntington Ravine. Large avalanche D3 cleared trees to within 15 feet of the Huntington Ravine Trail. Debris measured over 10 . . .

Avalanche activity and snowpack structure

February 28, 2020
By Helon T Hoffer – MWAC

See snowpilot profile for snow structure. We observed cracking around our pit location, with clean interfaces 10-20cm deep, though all our test results (ECTP15 and ECTP21) failed on a sun crust (65cm down) we think formed sometime last weekend.
We . . .

Huntington Ravine, north side, Damnation Gully

February 26, 2020
By Matt Shove – Ragged Mountain Guides

We saw evidence of roller balls, and small wet loose avalanches from the previous days warm up (R.5 D.5) We encountered good snow conditions, however we did experience short sections of up to 10cm boot pen in the fan on the southernmost aspects in . . .

Boot Sour Snowpack evaluation

February 26, 2020
By Mark Toronto – Ski Mountaineer & Instructor

Found good snow above 4,000 feet.
Skinning up Hillman’s for a run Wednesday late afternoon encountered a firm and settled snowpack with 4+ inches of powder on top.
I observed a consolidated base and anticipate new snow on this surface/snowpack will . . .

Wet Loose Debris: Frankenstein

February 25, 2020
By Alexander Teixeira – Mooney Mountain Guides LLC

While on descent from the Standard Route area at Frankenstein at 1:30pm, with a temperature of 40F we observed a debris pile from a wet loose/point release below some rocks near where the climbers trail begins to head down rib between the north slabs . . .

Snowpit in Guly #2

February 23, 2020
By Nick Aiello-Popeo – Synnott Mountain Guides

Our avalanche course visited the lower part of Gully #2 in GoS today to escape the crowds. While practicing compression tests, we found sudden planar fractures during our easy taps. These fractures were on a thin layer of small facets 20cm down, . . .


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.