Avalanche

June Lake BC

Samantha RubinEastside Region
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Quick report

Today I set out to observe the wet loose activity and check in on the persistent weak layers at the base of our snowpack in the June area. 

Wet Loose: Specifically, with SW winds, but also a greenhousing effect, I wanted more info on how northerly slopes above treeline would hold up today.  With flat light, it was a bit hard to see all of the activity. I found small sluffs, rollerballs,  and some small (D1) slides on all aspects up to 11000'. See avalanches for more info.

  • Snow was wet to moist to dry on northerly aspects @ 9600'. Ski pen was 15  cm @ 1 pm. Boot pen was 45 cm. 
  • Below 8500', the whole snowpack is wet on northerlies. Ski pen was 50 cm. Boot pen was up to 90 cm @ 3:30 pm. 

Persistent Weak Layers: I observed many crowns that had yet to be observed or submitted to us. P slabs, all elevations, E - N. Likely ran 2/13 - 2/15. Multiple D2 below treeline. Dry depth hoar is still present under a melt freeze crust, under a ~ 60 - 90 cm of a 1F to P hard slab. The dry depth hoar was broken up by ground anchors where I dug (NE, NTL, 9600'). 

I observed many small wet loose sluffs and small slides today on all aspects up to 10500'. I saw many point releases coming off of cliffs in near and above treeline terrain.

Weather

Air Temp
48
Cloud Cover
broken

Today was cloudy, very warm, and with light SW winds. It felt humid - you could feel the greenhousing where I was.

Avalanche

Size
D1.5
Count
5
Aspect
NE
Elevation
9900 ft

Persistent slab avalanche crowns that are somewhat filled in now. Likely broke 2/13-2/15.