Observation: Avalanche Professional

All Observations

Basic Information

Observation Details

Observation Date:
April 1, 2022
Submitted:
April 1, 2022
Observer:
Avalanche Professional - NPS Rainier Rangers AB, LC
Zone or Region:
West South
Location:
Marmot Hill - Alta Vista (5400-6000, W-S-E)

Signs of Unstable Snow

Recent Avalanches? 
Yes
Cracking? 
Widespread
Collapsing? 
None Experienced

Media/Attachments

Ski triggered wet loose slides on steep faces of Marmot hill and observed elsewhere.

Advanced Information

Weather Summary

Cloud Cover:
Overcast
Temperature:
30°F
Wind:
Light , SW
New/Recent Snowfall:
5" HN48 at Paradise weather station.

Strong sunshine in the morning with increasing cloud cover and temps warming to near freezing at 5400'. The day felt humid and warm even in cloud cover.

Avalanche Observations

 #  Date Location Size Type Bed Sfc Depth Trigger Photos Details
5 Apr 1, 2022 2:00 pm
() 		Marmot Hill - Alta Vista
SE 5800ft 		D1
R1 		WL-Wet Loose I-New/Old Interface 0.5ft AS-Skier
u-Unintentional
Ski triggered wet loose slides on steep faces of Marmot hill and observed elsewhere.
Report
Marmot Hill - Alta Vista

Several WL-D1/R1-I-ASu on steep faces, recent storm snow sliding on very hard frozen surface from days prior. 10-15' wide, runs up to 50' or where slope angle decreased, dense and slow moving.

Snowpack Observations

5" of wet, dense new snow in 48 hours around Paradise, sitting on top of a 2-3" pencil-knife hard melt-freeze crust. Underneath this MFcr was 2-3' much softer and damper snow, insulated from overnight freeze temps with. Ski pen 2-4", boot pen up to 18".

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