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Observation: Hatcher Pass

Location: Microdot S and Nosebleed

Date:
Observer:
Route & General Observations

Traveled from IMB parking to Microdot South Face and North face, Nose Bleed.
Low density snow on top 10-30 cm.
Some light wind effect on snow above 4200′

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Observer Comments

No whumphing, shooting cracks, or avalanches.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

Winds SE 15.5 kts at 4200ยด at 13:00, Overcast Sky
Snowing 1cm per hour by 14:00

Snow surface

New snow over 2mm thin layer of near surface facets

Snowpack

Closer to the top: 5-30cm of newer, low density snow over NSFs, unreactive except in isolated locations of barely cohesive enough snow for a localized crack.

Down deeper: Instability testing showing strong strength, generally ECTP 25+, but high energy, generally propagation, and poor structure, 5 lemons, including a thick layer of basal facets, multiple thin layers of mid pack faceting and buried surface hoar 4-8.0mm.

ECTP's on Microdot south and North both found reactive layers of surface hoar approximately 50-65cm down. We have also found BSH at the Hatch Common avalanche site from 12/9 and around $1000 Run. It can be patchy in distribution, but some areas appear to have better distribution, worth more investigation and adding it as a layer of concern in your assessments.

Stability has marginally increased through the week with only incremental loading of new snow and light winds. However, the potential for triggering avalanches is still present and we recommend conservative decision making and sticking to lower angle terrain out of the runnout of steeper slopes. As far as steep skiing goes, sometimes the mountains are saying go away, and other times they are saying come on in; this month they are saying go away!

Photos & Video
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