Avalanche

Right Gully

MWACPresidential Range
View on map
Observation photo 1Observation photo 2Observation photo 3Observation photo 4Observation photo 5Observation photo 6

Quick report

Cracking
isolated
Collapsing
widespread

Many large and destructive avalanches in most steep ski terrain. Avalanches not documented occurred in: Empress, Dutchess, Chute, and Central Gully and South Gully in Huntington Ravine. Zero visible cown lines but ample debris from the release of soft slabs running 3/4 length of many runout zones. Hillman's Highway has the largest debris pile and ran over 1000 feet in vertical relief. The avalanche debris had drifted snow on top, which leads me to believe the timing of the avalanches coencided or was just after the strongest winds overnight.

Many large avalanches on eastern aspects from wind loaded snow over a persistent weak layer.

Weather

Air Temp
25.4
Cloud Cover
scattered
Wind Loading
previous
Recent Snowfall
11 inches
Snow Avail For Transport
moderate amounts

Clear skies becoming overcast with temperatures around 25.4F degrees. No wind or blowing snow.

Snowpack

Dangerous avalanche conditions still exist due to refilled wind loaded slopes on most aspects, especially eastern. A persistent weak layer is 35cm deep on southern aspects and shows signs of fragile instability. Widespread whumphing was observed. Wind loaded snow was sensitive to human triggering  with density changes and areas with pooled graupel and rimed particles.

Avalanche

Size
D2.5 R3
Type
SS
Count
3
Aspect
E
Trigger
N
Elevation
4800 ft