Wet Loose Avalanches in GNP

Location Name: 
Glacier National Park
Observation date: 
Wednesday, May 11, 2022 - 15:45
Is this an Avalanche Observation: 
Yes
Observation made by: Public

Location

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Snowpack, Avalanche, Weather Images: 
Travel Details
Region: 
Glacier National Park - McDonald Lake Area
Activity: 
Skiing
Snowpack Details
Snowpack and Weather Details: 
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Elevation of observation: 
5000-6500 ft
Aspect(s) of observation: 
SW
Red Flags: 
Avalanches from the past 2 days
Rapid or prolonged warming
Rollerballs / pinwheels
More comments about the snowpack and weather: 
Below freezing in AM along the GTSR w/ 2-4 cm MFc at 5-6000'. Evidence of widespread WL cycle, all D1-1.5. Noted storm slab (est. 1.5' x 200') below Garden Wall in Haystack (photo attached) that released after being triggered by WL from above. Additional smaller storm slab was released in Haystack with same circumstance.  CLR sky all morning until we left road at 12:30. No avalanche activity was observed but the snow surface rapidly warming and MFc had broken down by 10:30 at 6100'. No visual obs of a few areas that we suspect may have avalanched - including Weeping Wall, Triple Arches, and Lower Slopes. Heaven's Peak Reminant Glacier and East Face glide cracks have released, presumed last evening.
Wind Speed: 
Calm (No air motion)
Air temperature: 
Above Freezing
Avalanche Details
Avalanche Details: 
Number of avalanches: 
20
Avalanche Type: 
Wet Loose
Failure Plane/Weak Layer: 
New/old snow interface
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Trigger: 
natural
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Aspect: 
West