Lawine

Central Swan

Rob MillspaughSeeley Lake
Auf der Karte ansehen
Beobachtungsfoto 1Beobachtungsfoto 2Beobachtungsfoto 3Beobachtungsfoto 4

Quick report

Day off tour south of the advisory area.

  • Found a recent large soft slab avalanche that was likely triggered by natural cornice fall during the last two days.
  • I could not replicate this result by punting smaller cornices down a leeward east slope.
  • Fresh natural rollerballs on very steep and rocky upper elevation slopes.
  • Triggered roller balls and small loose wet on a steep northwest slope.
  • Noticed glide cracks on all aspects.

I gave cornice and glide cracks a wide berth, but was otherwise comfortable traveling in obvious avalanche paths.

Caused many roller balls and some long running loose wet on an upper elevation northwest slope at 5pm.

Weather

Cloud Cover
few
Wind Loading
previous
Recent Snowfall
10-15 cm
Snow Avail For Transport
small smounts

Moderate westerly gusts above 7000'.

Snowpack

Roughly 10 to 16 cm of snow from the weekend storm on top of the stout mfcr.  Isolated drifts 30 to 50 cm thick above 8000'. Slopes facing E-S-W had a thin mfcr capping the recent snow.

Avalanche

Size
D2 R2
Type
SS
Count
2
Aspect
E
Trigger
NC
Elevation
8500 ft

Small skier triggered loose wet on northwest. Previous small natural loose wet on steep and rocky southerly slopes. Recent large soft slab avalanche caused by cornice fall in wind loaded east slope at 8600'. Will add avalanche events at a later time.