Human Triggered Avalanches
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HUMAN-TRIGGERED AVALANCHES
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These avalanches were reported to the Sawtooth Avalanche
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Center. Some events are not thoroughly vetted.
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Avalanches that caught skiers or riders are highlighted.
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DATEZONE - LOCATIONDESCRIPTIONSIZEASPECT
ELEVATION (ft)
SLOPELAYERDEPTH (ft)WIDTH (ft)VERT (ft)PHOTOSOBSERVATIONVIDEOREPORT
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12/8/2019Soldier & WRV - Eagle CreekRemotely triggered avalanches failing on faceted snow from Thanksgiving storms. No pre-Thanksgiving snow hereD2SW-W9,600-9,80011/26 FC1-1.5100-150[photo][observation]
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12/13/2019Soldier & WRV - Miller Creek headwatersRemotely triggered by snowmobilers from above wind affected slope - likely on buried SHD1.5SE8000likely 12/71-1.575~150[photo][observation]
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12/13/2019Banner Summit - Cape Horn MountainNumerous avalanches failing on 12/7 surface hoar, all remotely triggered from ridge line aboveD1-D2.5E-NE8600-910012/7 SH1-250-200[photo][observation]
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12/14/2019Galena Summit & E Mtns - Galena Summit/EgoSkier apparently triggered slide on the steeper, skiers L pocket of Ego (meadows on Salmon River side of pass)D1NW8700likely 12/7 ~1~40~100[photo][observation]
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12/14/2019Galena Summit & E Mtns - Galena SummitSkier remotely triggered small road cut above highway from approximately 30 feet awayD1SE86006-8"15-2015[photo][observation]
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12/14/2019Galena Summit & E Mtns - Galena SummitSkier remotely triggered multiple slides E side of Titus Ridge, above Titus Lake and north of the weather stationD2E-NE950012/7 SH1-2[photo]
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12/14/2019
Sawtooth and W Smoky Mtns - Headwaters/Smoky Crest
Remotely triggered (ski) avalanches failing on SH on N faces and FC/SH+MFcr on S facesD2N and S9000-1000012/7 SH1-2.5400[photo][observation]
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12/15/2019Galena Summit & E Mtns - 4th of July CreekRemotely triggered (ski) avalanches failing on SHD1-D2E-NE940012/7 SH1-1.550-100[observation]
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12/22/2019Sawtooth and W Smoky Mtns - Snowslide CreekRemotely triggered by ski check on lower angled slope above fracture. Broke on 12/7 surface hoar.D2E86003312/7 SH2200400[photo][observation]
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12/28/2019Galena Summit & E Mtns - Galena SummitRoadcut just up from lower Cross parking apparently triggered by skiersD1SE8500unknown~1~30~20[photo]
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12/29/2019Galena Summit & E Mtns - Salmon HeadwatersRemotely triggered from 30 feet away by snowmobiler. Depth seems consistent with 12/7 surface hoar.D2NE>900012/7 SH~2~100~100[photo][observation]
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1/1/2020Soldier & WRV - CarbonateHiker triggered from below. Wind loaded terrain. D2SE60000.5-35[photo][observation]
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1/2/2020Soldier & WRV - Vorberg GulchSnowboarder trigger from the side. D1E63003812/7 MFcr/FC1.5[photo][observation]
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1/3/2020Soldier & WRV - Couch SummitSnowmobiler triggered slab while sidehilling above road. No one caught. All details are from second hand report.D2SE~80002-2.5[observation]
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1/15/2020Galena Summit & E Mtns - Baker Creek
Snowmobiler triggered slab from low on slope. One caught, buried and killed. Failed on weak snow in a heavily wind-loaded area.
D2S9,10033FC/DH2-3200-300600[photo][video][report]
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1/18/2020Out of Forecast Area - Trinity MountainsSnowmobiler triggered slab. One buried and rescued.D2
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2/6/2020Galena Summit & E Mtns - Central BouldersRemotely triggered from 60 feet away. Recently wind-loaded pocket that released at the old/new interface.D1.5S9,6001.5[photo][observation]
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2/6/2020Sawtooth and W Smoky Mtns - Marshall BasinSkier triggered. Failed at the old/new interface.D1.5E9,200
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2/25/2020Sawtooth and W Smoky Mtns - Beaver CkSkier triggered while skiing. D1.5E10,00038crust, likely + FC?0.5-130300[photo][observation]
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3/8/2020Banner Summit - Lola CkSkier triggered while skiing. Skier caught and carried over rocks, skis came off, no injury.D1-1.5NE8800new snow0.54075[photo]
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3/27/2020Sawtooth and W Smoky Mtns - Alturas CkSkier triggered, intentional. D1E8300new snow on crust130[photo]
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3/28/2020Galena Summit & E Mtns - Owl CkSkier triggered, unintentional.D1.5N8300likely FC1-250[photo]
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3/29/2020Sawtooth and W Smoky Mtns - Salmon HeadwatersSnowmobiler triggered soft slab on sheltered slope. Fourth rider on the slope triggered the slide. D2NNW9400FC1.5-275[photo]
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4/1/2020Galena Summit & E Mtns - Avalanche PeakRemotely triggered by skier from 10 ft away, intentional. D2ENE9300near surface FC1-1.5100300[photo][observation][video]
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4/2/2020Soldier & WRV - Soldier Mtns, Peak 2Snowmobiler triggered hard slab on heavily wind-loaded slope. Rider was caught and escaped the slide, uninjured.D2E9350likely old/new interface-crust2-3200550[photo][observation]
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4/3/2020
Sawtooth and W Smoky Mtns - South Fork Boise/Bear Cr
Snowmobiler remotely-triggered avalanche from base of slope. Appeared to be persistent slab, top of the slope was wind-loaded but some of the slope was sheltered trees.~8400-8500
Likely FC from early/mid March
2-4~200~300[photo]
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4/4/2020Sawtooth and W Smoky Mtns - Mill GulchSnowmobiler remotely-triggered from base of slope, wind-loaded starting zone near ridgeline.D2N9600Likely FC below wind slab200200[photo]
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