Weather obs

January 5, 2020
By Ben Allen – Acadia Mountain Guides

Moderate west and northwest winds at 4000’. It Snowed all day at around S1 to S2. Small convexities on the side of the cog consistently cracked and slumped. 4-6 inches of fresh snow on the decent.

Observations around Right Gully

January 4, 2020
By Josh

Snow pit profile, and general photo observations

Upside down snowpack in Hillman’s

January 4, 2020
By Stacey

Yesterday our party of two traveled to the base of Hillman’s Highway to practice pit digging and field observations. We chose to dig the pit in the bottom portion of Hillman’s since it’s still early season, but discussed that we wouldn’t have been . . .

Huntington Ravine Conditions

January 2, 2020
By Ethan lemieux – MRS EMS Climbing School

There was plenty of snow moving in the Ravine in both directions across the bowl. There was no large crown lines or debris piles to be found. Maybe a few small slides out of the choke in central. The bottom of all the gullies look very full of wind . . .

Avalanche Tuckerman Ravine

January 2, 2020
By Jeff Fongemie – MWAC

Soft slab avalanche. E Slope, approx 35 degree slope angle.
Avalanche spanning a majority of the headwall. Some details unknown due to poor visibility. It appears to have started Center Headwall, first smaller avalanche failed mid slab, which then . . .

Human Triggered Avalanche Tuckerman Ravine

January 2, 2020
By Jeffrey Fongemie – MWAC

Human triggered soft slab avalanche. E Slope, approx 30 degrees. Party of one, snowboarder, triggered, caught, carried, not buried as reported by said snowboarder. Crown line starts low in Sluice spans under Sluice Buttress/Sluice Ice. This . . .

Slide in a Hillmans Highway

January 1, 2020
By Tyler Buckeridge

The snowboarder above me who was the only other person in Hillmans let of a slab about 35 feet wide right under this boulder 2/3 up Hillmans. There is a debris field about 100 feet long and 35 feet wide, or a almost as wide as Hillmans at that point. . . .

Developing wind slabs, right side of Tuckerman Ravine

January 1, 2020
By Frank Carus

Light to moderate snowfall, mostly rimed particles and full round graupel and blowing snow. 20-30mph+ in our location, 60-80mph westerly on the summit.
“Whumpfing” (x4) and shooting cracks observed. Surface wind slabs to 6″ were . . .

Test Pit Below Little Headwall

January 1, 2020
By Corey Fitzgerald – Northeast Mountaineering

Sky OVC. GR. East Aspect. Moderate West winds.
CT11 SP 1mm facets down 30cm

Willard East Face

December 30, 2019
By Matt Shove – Ragged Mountain Guides

Isolated pockets that are holding snow were becoming reactive during today’s storm. Lots of big wind, with mixed frozen particles were being deposited and transported. The small isolated pocket below the second pitch of upper Hitchcock was becoming . . .


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.