Observation: NWAC Forecaster

All Observations

Basic Information

Observation Details

Observation Date:
November 29, 2021
Submitted:
November 29, 2021
Observer:
NWAC Forecaster - Josh Hirshberg
Zone or Region:
East North
Location:
Twisp River road (All aspects, 2900-7400ft)

Signs of Unstable Snow

Recent Avalanches? 
Yes
Cracking? 
None Experienced
Collapsing? 
None Experienced

Media/Attachments

Crescent Mtn
Reynolds Mtn. Red outlines show avalanche debris (likely wet loose) from 11/28 on NE between 7000-7600ft
Rollerballs on pt 7576 above Slate Lake. SE 7200-7,500ft
Thin snow cover on slopes above 65000ft contrast with the dry terrain lower in Wolf Creek
A profile at 7350ft, SE near Slate lake. Height of snow 55cm. The blue card marks a layer of 2.0mm rounding facets.
Rounding faceted grains in the lower half of the snowpack.

Advanced Information

Weather Summary

Cloud Cover:
Partly Cloudy
Wind:
Light , W

Warm temps with decreasing clouds becoming FEW and light W breeze w ridgetop gusts to 15mph. No snow available to transport.

Avalanche Observations

 #  Date Location Size Type Bed Sfc Depth Trigger Photos Details
4 Nov 28, 2021
() 		Reynolds Peak
NE 7400ft 		D1 WL-Wet Loose N-Natural
Reynolds Mtn. Red outlines show avalanche debris (likely wet loose) from 11/28 on NE between 7000-7600ft
Report
Reynolds Peak

Observed numerous avalanches (all that I could confirm were wet loose) to size D1.5. x7 on Reynolds Peak massif, NE 7,000-7,500ft. One D1 above Slate Lake on NE, 7,200ft.

Snowpack Observations

Continuous snow began at 6500ft with minimal snow on solars at lower elevation and patchy snow on shaded slopes down to 4,500ft. At upper elevations, height of snow ranged from 50-70cm with drifts to 90cm. In addition to avy obs, saw many roller balls from 11/28.
At 7350ft, SE between Whistler ck and Little Slate ck a profile revealed:
HS 55cm- most snow had been wetted w the top 25cm moist
↓32cm CTM 12 (RP) on 4F hard, 2.0mm, rounding facets
See pit photos

Avalanche Problems

Wet Loose are now unlikely as snow is in various states of refreezing. No other avalanche hazard.

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