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DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
30-JAN-2016Joey SlowikOld Faithful above treeline1001/5Pit only about 1.5m but only two definite layers. New snow on a firm somewhat crusty layer and a consolidated firm snowpack below. New snow was adhering to lower layer well. Did not separate under shovel test.Large slab avalanche off Old Faithful to north. Slab slide on old wind snow layer which was just above ground. Slide began below cornice facing the river. Slab about 1m thick, D3, R4 size. Ran to just below tree line in path. Slide happened on either the 28th or 29th.

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
30-JAN-2016Erik StevensThree-guardsmen arealight, NW7/8Storm snow layers are thick and deep. There seems to be a widespread weaker storm layer about 15cm thick, roughly 30-60cm deep. Lots of whumpfs on this layer as it settles under human weight. In high-alpine windy regions where snowpack is thin, 3mm depth hoar at the ground. Several recent slides ran to the ground on depth hoar. Other slides of storm snow were 30-90cm deep. Mostly D2 in size. Generally sketchy out there. Other groups report lots of whumpfing.

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
24-JAN-2016Jeff Moski5-Mile Creek 12"S moderatecloudyIdentified storm layers totaling around 2 ft from the day prior at 3,000 ft. Settled and heavy. Noticed crowns along the roadside from the overnight snow. Didn't see any obvious red flags while out. No conclusive pit results to report. Moderate winds compacted exposed southerly slopes causing a slab to form. Text book "Soft slab."

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
13-JAN-2016Joey SlowikOld Faithful50 cm03/450 cm new wet snow on a thin layer. New snow packed and adhered to old snow well. Shovel test took significant force (10 fist slams) to breaking point at thin layer. Shear test broke column off at base of pit (~140cm) with no breaks in-between. However, Rutschblock test cleaved the new snow layer as a slab.NoneVery warm.

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
03-JAN-2016Thom ElyNadahini12 - 18N 5 - 10Clear12 - 18" wind slab on top of hoar frost layer2 skiers set off a large slide originating from the top of the south facing slope below the south peak that ran onto the flats between the peaks. They triggered it from the flats below the slope on approach and had turned back to the ridge after hearing whumping and were in a safe zone when it slid. Lower slopes above the green shack are wind blown but stable. Stay off the upper slopes and the peak face until things consolidate and bond.

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
03-JAN-2016Thom Ely3 Guardsman12N 5Clear12 - 18" wind slab from recent storm on W slope facing the road. Layer below has hoar frost crystals. On approach to the N ridge we set off a slab avalanche originating from the W slope below the ridge on a 30 degree angle. It ran for 200' with a crown depth of 12" and accumulation of 5'. Lots of whumping as we started up the slope which set off the slide.

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
03-JAN-2016Joey Slowik5 Mile creek area, sunny side.000Snowpack at treeline about 120cm deep. Top 30cm of wetter dense snow with light sun/wind crust on top. 30-60cm a consolidated old snow layer with a thin crust. 60-80cm another consolidated old snow layer. 80-120cm loose sugar layer around the willows. Top 30cm layer fractured easily with two-three shoved taps. Once the top layer was removed the 30-60cm layer sheared easily with only an additional tap. Layer below solid no fractures.Several old short slides where cornices broke but under new snow layer. Large new slide on Mount McDonell east side. Several fractures and large slabs.

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
24-DEC-2015Erik StevensLutak Zone, treeline6light, N0New snow is rightside-up, but 60cm deep is a 3mm surface hoar layer. ECTN on this layer with a Q1 shear. Stomp test found this layer easy to trigger with human weight.none observedWinds weren't bad at all. No Active wind loading observed. Stability is fair, but watch out for those isolated surface hoar pockets!

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
22-NOV-2015Kanaan BauslerNadahini East behind Green Shack25cmWest ModerateOVC > BKNFacets throughout the bottom 50cm of a 75cm total snowpack. Ground up to 30cm is just pure facets (.75-1.5mm), lots of air space between the sugar, HOLLOW. Deep and light, all layers are Fist hardness with only differentiation coming from insignificant settling and wind events. Temperature gradient in the bottom 10cm from -2.5C at the ground to -3.5C at 10. Naturals all along Nadahini North face above the bowl/pass. One HS-N-R2-D2 about halfway up the slope behind the Green Shack en route to the bowl. As we were skinning past it the snowpack collapsed below us, very loud WHOOMPF. At the short peak ~6000ft elevation at the end of the bowl/pass to the glacier we triggered another WHOOMPF and a 20m crack that initiated an HS-F-R1-D1 avalanche. Fragile facets up there with an energetic wind slab that propagates easily.ECTX x2 CT17 @ 50cm from ground Q3 BRK

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
17-NOV-2015Jeff MoskiNorth Aspect above treeline15 cmcalm partly cloudyDug a pit near treeline and noticed a few different interfaces. Snowpack depth was 205 cm. Top 15 cm was the new snow. At 40 cm there was a compact 1 finger "mid-pack". Down 105 cm there was a pencil hard ice crust. Compression tests failed at top 15cm fairly easily CT8. All else was hard to propagate. Q2 shears when I pried on column with shovel. Isolated pockets of "wind" soft slab exist at higher elevation. Careful on unsuspecting rollovers in the trees and such terrain traps. At higher elevations with noticeable wind effect, human triggered soft slabs were likely. Mitigate by choosing terrain wisely and practice safe travel technique. Great snow!

DateNameLocationNew SnowWindsSky/CloudsLayersRecent Avalanche ActivityObservations/Assessments
31-OCT-2015Erik StevensNadahini areanorthwest, lightovercastSurface is mostly rime crust, with pockets of softer wind-affected snow in gullies. Overall snow depth above 4500ft is about 30-60cm. Snowpack is various rime crusts and dense wind slabs, with pencil-hard ice crust near 15cm down. Facets just starting to form below the crust near the ground.none besides small loose slides in couloirs and below cliffsGood skiing to be had above 5000ft!


Disclaimer: Use the data on this website at your own discretion as part of a thorough evaluation of the avalanche hazard in the field. Remember that conditions vary greatly from place to place and hour to hour, so evaluate the snow you find locally, and compare it to what you read on this website. We are not responsible for how you use the information contained on this site, and assume no liability for its use. Remember, information is no substitute for experience. Educate yourself in avalanche safety. The information on this website is not sufficient for completely safe backcountry decision making. Use at your own risk.