Avalanche

Schoolbus, Python shoulder, Thompson pass corridor

Joshua McDonaldIntermountain
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Quick report

Cracking
isolated

Sunny spring weather and fresh snow encouraged users to make hundreds of tracks on Thompson Pass today. Numerous small human-triggered storm slabs were observed in mid-mountain areas.  Other activities included small human-triggered wet and dry loose as well as a cornice release on RFS. As expected wet loose activity on Westerly slopes was active in the afternoon.  Hazards were limited to surface snow conditions and were generally easy to spot. 

Cracking within the 10-20 cm storm snow was observed at mid-elevations on Schoolbus. Snow was very sensitive in some areas but posed minimal hazard due to shallow depths and spotty distribution of the problem. Several small (D1) storm slabs and dry/wet loose slides were triggered by riders today.

Weather

Air Temp
23 on N aspects
Cloud Cover
few
Wind Loading
none
Recent Snowfall
10-20cm
Snow Avail For Transport
moderate amounts

Calm clear weather with an occasional light Northerly breeze was observed throughout the pass. Temps remained cool in areas not effected by the sun.

Snowpack

A 1.2 meter deep pit was dug at 4500 feet on School bus. Instabilities were limited to the recent storm snow. ECT scores were in the single digits but did not propagate across the block. 

Avalanche

Cornice fall observed in action on RFS Westerly aspect. Glide crack released today in airport chutes. Numerous D1 human-triggered storm slabs were observed in the Thompson Pass Corridor. Several D1-D2 storm slabs released during storm within last 24 hours