Oakes Gulf snowpack

March 25, 2019
By Ryan Matz – MWAC

Widespread stubborn 3/23 wind slab throughout Oakes Gulf, varying from several feet thick to inches thick with minimal scouring to older ice crust. Newer wind slabs could also be found in terrain roughly lee of westerly wind that was more reactive . . .

Avalanche Debris North End of Gulf of Slides

March 24, 2019
By Jeff Fongemie – Mount Washington Avalanche Center

Soft slab avalanche debris from this past storm cycle. 2/22-3/23. Debris pile wind effected and partially buried by new snow drifts. From Main Gully north, the gully tops were scoured or very heavily wind effected. Below this we found smooth slabs . . .

Avalanche, Tuckerman Ravine Headwall

March 24, 2019
By Ryan Matz – MWAC

Natural large hard slab avalanche that likely occurred late Saturday. HS-N-R4-D3-S. A true “Bowlalanche”, this crown is connected from Lower Sluice through Center Bowl and all the way to Chute. We think a soft or wind storm slab avalanched on Friday . . .

Red Flags in Tuckerman

March 22, 2019
By Helon Hoffer – Mount Washington Avalanche Center

We ascended from Hermit Lake toward the Bowl via the Little Headwall. Using the looker’s right fork of the Little Headwall as our route, we remotely triggered a soft slab that released about 30 ft from us. SS-ASr-R1-D1-S. Upon arrival at Hermit Lake . . .

Tuckerman Ravine – Rapid Warming & Roller Balls

March 14, 2019
By Jeff Fongemie – Mount Washington Avalanche Center

Warm day with occasional high thin clouds and a light wind. 34F on the summit when this picture was taken. Felt much warmer in the ravine. Top 8 to 10 cm of snowpack moist/wet, roller ball activity increased through the afternoon on south, south east . . .

Loose Wet slide almost catches two people

March 14, 2019
By Sean Lorway – Synnott Mountain Guides

Huntington was in full sun all day today.
Roller balls began being observed after 12pm – the two skiers were in ski track below Yale when the slide started (originating in Yale) gave them a pretty good scare- we heard it before we saw it.

Skier Triggered Slide

March 10, 2019
By Ryan Gibbs

Slab was firm pencil to knife hardness first run at 930am . Snow intensified to 1”/hr. Roughly 2” accumulation + wind deposit. Sluffing off of the ice below crux resulted in 20-30cm pockets. Second hiker on third run triggered a small R2, D1 slide . . .

Gulf of Slides Main Gully

March 10, 2019
By Mike Donovan

12″+ loose snow wind slab with 2″ firm crust on top. Sitting on firm smooth layer that was observed to be exposed in the center of the chute.

Avalanche Observation, Tuckerman Ravine

March 8, 2019
By Helon Hoffer – Mount Washington Avalanche Center

Around 1pm, a skier triggered an avalanche on the steep skier’s right wall of Right Gully (HS-AS-R1-D1). This is a common spot for skiers to trigger avalanches in Right Gully because of the steep slope angle and the aspect of the slope changes from . . .

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 . . .

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.

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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.