Bowl Report – 2020-02-02

By Mark Renson | AIARE Acadia Mtn Guides

Date of Observation: February 2, 2020  1:00 PM
Location of Observation: Tuckerman Ravine

Instructed an AIARE 1 for Acadia Mountain Guides. Saw what appears to be evidence of a recent small slab release below the buttress between Right Gully and Lobster Claw. See circled in red in the attached pic.
Did some tests on N aspect of Bowl at 4300 feet just east of Left Gully runout away from the floor of the ravine and any runouts. I got cracking and a failure on the 2nd jump on skis on a small rollover 10cm down. Digging revealed some signs of faceting around the Jan 13 crust with an ECTP Score 16 below the crust. Some hard CT results were found in the slab above the crust. I did my first PST in 10 years and got a 95/100 just above the crust (i.e.: very little propagation). The usual huge variability was noted. Sherburne skied very well skier packed powder on the upper 2/3, pretty decent on the middle 2/3 and edgeable hardpack on the lower 1/3 that was not a buzzkiller and all with good coverage. Facebook spray on my page forthcoming.


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.