Huntington Ravine, reactive wind slab and scouring

January 4, 2019
By Ryan Matz – MWAC Forecaster

Variable upper snowpack- Pockets and larger areas, particularly in Central, Pinnacle, and especially Odell, of recently formed wind with significant areas scoured to hard, supportable crust.
Wind slab was touchy though thin and small in observed . . .

Avalanche Observations in Tuckerman Ravine

January 4, 2019
By Helon Hoffer – Mount Washington Avalanche Center

On touring into Tuckerman today, we noted the following activity:
SS-N-R1-D1.5 in Center Bowl of Tuckerman. This likely occurred 1/3/18. We think so by the amount or reloading that took place. This may have been triggered by very small dry-loose . . .

Avalanche Observation in Left Gully

January 3, 2019
By Helon Hoffer – Mount Washington Avalanche Center

We observed debris in the far looker’s left runout of Left Gully.
L-N-R1-D1.5
Loose snow avalanche, naturally occurring (probably this morning), very small relative to path (though just a guess as visibility was very poor and we could only see 200 . . .

Avalanche Observation Left Gully Tuckerman Ravine

January 2, 2019
By Jeff Fongemie – Mount Washington Avalanche Center

Good visibility early this morning for observations in Tuckerman Ravine. Obvious avalanche debris at the bottom of Left Gully from the Dec 31/Jan 1 storm. D1.5 in size, crown not visible.  Possible avalanche debris on the floor of the ravine under . . .

East Side Snowpack

December 30, 2018
By Helon Hoffer – Mount Washington Avalanche Center

We climbed Yale Gully in Huntington and talked to climbers who were in Pinnacle and Central. Isolated pockets of new snow exist on top of the December 22/23 melt-freeze crust. This new snow arrived on a refreezing snowpack and has bonded well. High . . .

Wet Slab Avalanche, 12/21-12/22 rain storm

December 23, 2018
By Ryan Matz – MWAC Forecaster

First visibility following rain storm, large wet slab avalanche crown and debris observed. Suspected occurrence late Friday 12/21 or early Saturday 12/22.
WS-N-R3-D2 (Wet Slab, Natural Trigger, Medium size relative to path, Large enough to bury, . . .

Snow pit in Gulf of slides Gully #1

December 20, 2018
By Christopher J L Damboise – Norway avalanche

Snow surface was dry at the pit but sun exposed slopes saw some surface melt. Air temp warm ~30 deg. cloud cover 0%
Snow pit
east slope at 30 deg steep 4000 feed above sea level.
Snow depth 120 cm
ECTX
There were no strong boundaries in the snow . . .

Shoestring Well Filled In

December 19, 2018
By Nick Aiello-Popeo – Synnott Mountain Guides

Shoestring Gully is in great, snowy condition for December. It showed signs of recent avalanche activity and windslab formation. A mitt pit at around 2,200′ in the first snowfield of the gully (WSW aspect) showed layers of one-finger-hardness . . .

Snow pit Left Gully Tuckermans Ravine

December 16, 2018
By Christopher damboise

unbreakable crust with skis, boots broke the crust down the left gully. See photos for snow pit info location and photo of the pit.

Mixed Bag of Stability – GG

December 16, 2018
By Ryan Gibbs

In an isolated ENE terrain feature at 4800’ I dug a pit down to a firm layer. HS 185cm. I performed a CT which resulted in a CT12 at 115cm, Q2, on DF. There are several layers of facets between the observed crust layers. This failed BELOW a crust . . .

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.