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

Weather:
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.
Snowpack:
“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.
ECTN25
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 . . .

NE Snowfield Rain Crust

December 22, 2019
By Jonathan S Shefftz – NSP

The new snow was in abundance all the way along the Cog tracks, allowing continuous skinning from the parking lot to the auto road crossing, with some really nice skiing from below the transformer portage (i.e., a few hundred vertical above Jacob’s . . .

Tuckerman Ravine

December 22, 2019
By Mark Renson – AIARE

Instructed at an AIARE 1 course. Took following temps at Hermit Lake at roughly 11:45am-> TAir: 0c, TSurf: -6c, T10: -8c, T20: -9.5c.
We did some digging near Leve Rock in Tuckerman Ravine. Huge variability – I found HS 190cm with HS 85cm roughly . . .

Human Triggered Avalanche in Sluice – Tuckerman Ravine

December 21, 2019
By Jeff Fongemie – MWAC

Observed fresh avalanche crown with ski tracks entering in from lookers right. Slope SE, slightly convex, approx 40 degree slope angle. D1 hard slab, 30′ wide with a crown height 20″. Very little debris remained possibly due to fragmenting & . . .

Growing snowfields in Tuckerman & Huntington Ravines

December 20, 2019
By Jeffrey Fongemie – MWAC

Clear skies, calm wind. New snow Tuesday and Wednesday followed strong W wind has increased the size of snowfields in Tuckerman & Huntington Ravines, particularly mid-slope well below the sky line. In Tuckerman Ravine the sluff piles continue to . . .

Tuckerman’s Ravine

December 18, 2019
By Joseph Soccio – MWAC

On and off again clouds provided on and off again visibility. Calm W winds had little effect on the moderate amount of snow falling. A thin rain crust is present near and above tree line. Depth of the rain crust within the snowpack varies depending . . .

Graupel layer below Left Gulley.

December 18, 2019
By Tony Jewell – Northeast Mountaineering

We observed anywhere from about 10cm to 30cm of new snow on top of the Dec 15 crust in the area below The Chute and Left Gulley. (The crust varied from about 5cm to 20cm thick depending on aspect and was knife hard.) Multiple hand shears and tests . . .

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.