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Observations

Jan. 22, 2019, 2 p.m. PST

Region: Stevens Pass

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Lanham Lake

Route Description: Skied trees and stayed off exposed / wind affected terrain

Weather: Overcast, light mist before noon; wind picked up in afternoon and was snowing heavily by 2pm

Snowpack: HS220 @4800', N facing opening: CT9@20cm, ECT11N@20cm @5600', E facing opening: CT11@30cm

Avalanches: D1, D1+ natural soft slab observed around 5000', crowns just below rock features on North facing aspects

Jan. 22, 2019, 1:45 p.m. PST

Region: Mt Hood
Observation by Alexander Vasarab

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Bennett Pass, Mt Hood @ 4300' NW aspect

Route Description: Bennett Pass Rd, trees, clearcuts

Weather: C wind, 0C temp, X sky, S1 precip Away from the valley bottom and on the ridge, however, things were quite windy and lots of blowing snow could be seen being transported from S to NW

Snowpack: HST 20cm, PF 20cm, PS 10cm Limited new snow atop crust showed no internal cohesion and skied beautifully.

Avalanches: No avalanches observed, but small rollerballs were seen later in the day (14:00-16:00).

Jan. 22, 2019, noon PST

Region: Snoqualmie Pass
Observation by Dallas Glass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Alpental Valley/Great Scott Bowl

Route Description: Alpental Valley to Source Lake via the low road. Source Lake to Great Scott Bowl and Pineapple Pass via Big Trees. Return same

Weather: Overcast skies all morning. Temps near freezing. Snow became sleet, then freezing rain above 4200' at around 1030hrs. Below 4200' Rain. Wind mainly Light SW , with Moderate SW winds and light blowing snow in Pineapple Pass.

Snowpack: 1CM freezing -rain crust on the surface over 15-30cm of recent snow from the weekend. 1/19 Interface down 15-30cm. Test results resistant. 1/17 down 45-55cm. No SH nor FC found in this area. Wind loading on the N-E aspects near Pineapple Pass. Very thin (12cm) wind slabs on lee slopes.

Avalanches: No new avalanches observed. Poor visibility limited views into near by terrain.

Jan. 22, 2019, 11 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by joe petroske

Did you see any avalanches? No
Did you trigger any avalanches? Yes
Was anyone caught in an avalanche? No

Area Description: Ascent to artist point

Route Description: Above 10 minute

Weather: Low visibility, some wind, light snow

Snowpack: Some wind loading in places of depths 1-5 inches, snow beneath mostly consolidated but some lighter snow around

Avalanches: We triggered a small slide on a small slope that was at approximately 30-40 degree and north west facing. The break was approximately 6-7 inches deep. Lighter snow slid off of a consolidated icy layer by me when I was sliding down the slow slowly sideways. My friend was also skiing pretty slowly to the side of my and stopped above where the slope eased but also triggered a small slide.

Jan. 21, 2019, 3:10 p.m. PST

Region: Olympics
Observation by Richard Forbes

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Summited Mt. Ellinor via the winter route.

Route Description: We brought snowshoes and crampons, and ended up stashing the snowshoes and climbing in crampons due to the supportive crusts along the whole route.

Weather: Blowing clouds with occasional sun, light snowfall during later afternoon. Light wind, without any visible wind-carry.

Snowpack: Minimal snow coverage until ~4,000 ft. Climbed the up the winter gully (which had seen a lot of traffic) to the s-facing bowl. The gully and bowls above were heavily wind affected, with patches of up to a foot of wind-deposited powder (generally on the E side of ridges, though it could be found all over) interspersed by supportive crusts. Once we reached the s-facing bowl at the top of the gully, we found it was generally scoured to a thick supportive crust, w/ patches of windloading. I could get ~20 cm of penetration through various crusts with my ice axe before the crusts were too thick to break through. I dug a pit above tree-line @5,500' (28 degree slope, NNE facing) on the lee-side of a small ridge. HS = ~280 cm, through I couldn't dig deeper than 110 cm down [due to an pencil-hard ice sludge at least 50 cm thick that I couldn't shovel through]. Above the icy layer, I found ice crusts @50 cm down, 30 cm down, and 20 cm down (this one was the thickest @ ~ 4 cm thick), all separated by 1-finger-hard snow. The top 20 cm seemed to be windblown, and was fluffier than the rest (4 finger hard). I did a CT, and had the top 20 cm (windblown snow) collapse at CT6 Q1, breaking under the thick ice crust and sliding easily on the top of the next layer of snow. @CT11, the next ice crust down (30 cm deep) failed Q1 and slid easily on the next lower layer of snow). and @CT15, there was a Q1 failure 60 cm down to the impenetrable ice layer, which also slid easily.

Avalanches: Saw evidence of multiple loose wet slides along the gully walls and on s-facing slopes in the bowl above, though today it was too cold and cloudy for any activity.

Jan. 21, 2019, 2 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Scott B

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Cutthroat Drainage

Route Description: Climbed south aspect early this morning. Friday/Sat Storm Slab bonded less well on Westerly aspects, particularly above 6800 feet where the inversion topped out last weekend. New sun effect on surface just starting at 11:30 am below 5,500 feet. Then climbed up to look at the 1/19 slide on the traverse to 1st bowl. Traversed below 2nd bowl. A D3 avalanche has ripped out the entire looker's left side of 2nd bowl (looks like on Saturday afternoon or evening--no new snow on the debris). Propagated all the way across the top of the bowl. Another D1 point release with minor propagation in the right side of 2nd bowl. All three avalanches released naturally during or right after the 1/18-19 storm at similar elevations on aprons below steep granite headwalls, North facing at 6,200- 6,800 ft. Skied out on new carpet of surface hoar, at least 2 cm, that formed last night between 5,500 and 4,500 feet.

Weather: Bluebird. Warm on South aspects. Cold on North.

Snowpack: About a foot of settled storm snow from 1/18-19. Low density above 5,500 feet.

Jan. 21, 2019, 9:48 a.m. PST

Region: Stevens Pass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Lictenberg Mountain

Route Description: Nason creek approach to the south side of Lictenberg

Weather: Partly cloudy

Snowpack: Variable. Hard rain crust down low(>4k), 10-20cm of punchy sometimes wind affected snow above 5000'

Avalanches: Three of us heard loud whumpf that finished with a cracking sound, spotted a shooting crack above the skin track near a convex rollover. 4900' SW aspect

Jan. 21, 2019, 8 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Nick Belcaster

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Mt Baker Backcountry

Route Description: Bagley Basin over Herman Saddle

Weather: Clear to intermittent cloud cover. Occasional solar input.

Snowpack: Varied amounts of dry loose snow, around 5cm sitting on top of punchy 2.5cm crust that collapses in certain spots. Around 5,000 feet ele. on East aspect encountered widespread surface hoar growth, which continued over saddle and down West face to similar elevation.

Avalanches: Minor and old point release wet slides from solar input earlier in the week along South aspects of Mt. Herman.

Jan. 20, 2019, 3 p.m. PST

Region: Stevens Pass
Observation by Tab Wilkins

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Skyline Ridge area.

Route Description: Toured through Skyline Lake, up to Tye Peak, down across the drainage and then up, over and down Moonlight Basin.

Weather: Cloudy throughout the day.

Snowpack: There were several layers easily penetrated on the SE slopes we skied. Top layer of powder about 10 cms, then a slightly firmer layer and then down another 25 cms to a harder layer. We did ski cuts but nothing ran, off of Tye Peak there was a crust you could break through at 4,700 feet and below, on Moonlight Basin the crust was firm until below 4,000 feet.

Jan. 20, 2019, 1:42 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Sam Fletcher

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Mt Baker Coleman Glacier, just below Gargoyle camp. Elev: 7087 Aspect: NE 24 Degrees

Weather: SW wind, C->L

Snowpack: 5cm new on top of supportable 2cm crust. ~20cm P-hard old snow below transitioning to ~20cm 4F layer. Then, 1F observed to 100cm. No obs below 100cm HS 3m+ Crust started to break @4600

Avalanches: 2x L-N-R1-D1.5-S on N facing rock bands in thunder glacier valley.

Jan. 20, 2019, 1 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Patrick Riffie

Did you see any avalanches? Yes
Did you trigger any avalanches? Yes
Was anyone caught in an avalanche? No

Area Description: North aspect 6500’ 35 degree slope

Route Description: Skinning began around 4400’, climbing through thick trees and gaining a ridgeline. Options to ski W/SW or N/NE above treeline.

Weather: Mixed clouds and occasional sun

Snowpack: North aspect 6500’ 35 degree slope Mid 20’s temp with strong moderate west wind. Snow available for transport and blowing over the ridge. 215cm total depth, we dug one meter down. There was about 65 cm of wind deposited storm snow, on a crust from the clear skies and warmer temps over the past weekend. We performed compression tests, and saw storm snow settle but didn’t display energy or planar quality until CT23. At CT23 the column released and moved halfway off its base with moderate energy and a clean planar surface 75 cm down from the surface. We found buried surface hoar, crystals up to 4mm.

Avalanches: Soft slabs 8-15cm were running very easily on slopes over 35 degrees, easily triggered by kicking cornice chunks. By the time we left at 1600 the soft slab was notably less reactive. There was visual evidence of natural activity throughout the north and east aspects on slopes over 35 degrees.

Jan. 20, 2019, 1 p.m. PST

Region: Snoqualmie Pass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Great Scott Bowl, 4550 ft, E aspect, 35 degree slope, benches approaching Bryant

Route Description: Source Lake approach up through Big Trees to Great Scott bowl

Weather: Overcast with valley fog, wind calm, no precip

Snowpack: 330 cm total depth, 4 inch new over yesterday's warming, 50 cm on top of the 1/17 crust. Test results: ECTP at 55 cm X 3 , PST End 30 over 100 X 3 at 55 cm Whumphing on approach to test site

Jan. 20, 2019, noon PST

Region: Snoqualmie Pass
Observation by Bryan Serkin

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Commonwealth basin

Route Description: Went on initial exploration towards Cave ridge. Skied a test slope and then climbed/skied Lundin peak

Weather: Cloudy. Low to minimal wind. No precipitation.

Snowpack: Rain crust until around 4600 feet. Increasing low density snow which skied well from 4600 ft and higher. Challenging crust 4600 ft. and lower. Minor sloughing was noted on a convex rollover at 4700 feet. 5000 feet. South facing slope, 35 degrees. ECTP24 down 20 cm to a layer of surface hoar.

Jan. 20, 2019, 8 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Dane Setzer

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Table Mountain, Baker Backcountry.

Route Description: Circumnavigate Table Mountain clockwise from Baker Ski area lot.

Weather: Overcast in the AM, moving to Scattered in the PM. No Precipitation. Light North Wind above treeline. Light blowing snow observed. Small wind slabs observed forming in areas where blowing snow was being collected.

Snowpack: Dug a pit at 4820' in elevation. NE Aspect. Slope Angle 22 degrees. Air Temp 26F. Observed approx. 10cm of new snow on top of most recent rain crust. Layers below the most recent rain crust were all 4F. Performed a compression test with results: CTE SC down 20cm. Also ski cut this same aspect/elevation on a small slope ~35 degrees with no reactivity. No extended column test performed.

Avalanches: No new avalanche activity observed during our tour. We did observe several 1-2 day old slides on all aspects at and above treeline that have been covered with the 10cm of new storm snow from yesterday.

Jan. 19, 2019, 8 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Upper Columbia Powder Cartel Pablo EskiBar and Peter Larsen

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: End of rd . arena , SR20 NCH

Route Description: N aspect 3100'- 4500' , 30 deg. + - , wind protected , varigated , convoluted , old growth , ribs , ravines , puzzle keyhole traverses to openings , repeat .

Weather: 31 deg@3100 to 28ish @4500 , frequent large tree bombs with and without accompanying branches @3100 to all snow still in trees @4500 . No wind .

Snowpack: 8" new snow over hoar. over about 8" soft old snow over warming crust layer. Overall snowpack warming . Easy basket penetration through crust into deep substrate . No cracking ,woomphing or skicut propagation on rollovers . Dramatic difference from cold snow high to heavy soft down low. Heavily bombed and deep crater impacted , may have helped stablise the pack and realease energy . Openings clean , surfy , and easy .

Avalanches: N.A.

Jan. 19, 2019, 8 p.m. PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by Craig Muderlak

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Crystal Backcountry - Bullion Basin

Snowpack: Extensive 2-3 cm rain crust observes on all aspects up to and above 6,000 ft. Appears that freezing level was closer to 7,000ft. Firm crust made for very challenging turns. Despite the lack of propagation in test today, the poor structure of this snowpack, makes me apprehensive about "stepping out" in this zone despite the numerous tracks observed on steeper avalanche paths today. - @6,000 ft, NE 43 degree slope: three distinct crusts surrounded by facets in upper 60 cm of snowpack: CTM(13) Q2 down 25cm facet/crust interface CTM (20) Q2 down 40 cm facet/crust interface ECTN (22) down 25cm facet/crust ECTN (26) down 40 cm facet /crust

Jan. 19, 2019, 7:23 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Kurt Mehrer

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? Yes

Area Description: Cutthroat, bowl 1

Route Description: Skin track up through trees on lookers left of the snowmobile parking

Weather: Snow, heavy at times.

Snowpack: 8”+ of fresh.

Avalanches: Natural release from under the cliff while on our way up. Not skier triggered. Two skiers caught. One completely buried, wrapped around a tree, the other but tied up to the waist. 3 skis lost as well. Difficult trip out!

Jan. 19, 2019, 6:50 p.m. PST

Region: Snoqualmie Pass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Found stable, creamy snow between 5600-4500 ft, challenging breakable crust between 4500-3800 ft, crust was softer and easier to ski below 3800 ft.

Route Description: Kendall

Jan. 19, 2019, 5 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Nate Hough-Snee

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Tronsen Head/Windy Knob

Route Description: 30-degree north slope, 5700'.

Weather: BKN late afternoon and then CLR full moon exit. -2C Wind light west, no transport.

Snowpack: HS 100-110cm. HST 14-20cm. Similar structure as reported 1/17 and 1/18. Shallow with multiple crust and rounding facet/preserved SH layers. Ski cut on 35+ N slope off Windy Knob was unresponsive.

Avalanches: Tronsen Head ripped D1+ on 1/18 or 1/19 on SH along a shallow rock band. Debris ran quite far for the size of the slope. See photo.

Jan. 19, 2019, 2 p.m. PST

Region: Stevens Pass
Observation by Andrew Powell

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Grace Lakes area, 100m north of the cat track @ 4330', SW aspect

Weather: Overcast to broken sky, intermittent snow showers with 3cm accumulation in 5 hours

Snowpack: Average Snow Depth: 170cm There was a breakable crust just below the surface, and a total of 30cm storm snow in this protected location. Wumphing was observed just off the cat track, and the recent storm snow is sitting on a 1-2cm layer consisting of surface hoar, rime, and facets . Grains ranged in size from 3-8mm. This layer, buried on 1/17, is sitting on top of a 2cm crust. Snowpack tests: CT4(SC), CT4(SC), CT9(SC) on the SH layer @ 32cm down (1) PST End 49/100 on the SH layer at 32cm down

Jan. 19, 2019, 2 p.m. PST

Region: Stevens Pass
Observation by Jordon Foster

Did you see any avalanches? Yes
Did you trigger any avalanches? Yes
Was anyone caught in an avalanche? No

Area Description: 5,500' East aspect, immediately below ridgeline

Avalanches: Triggered a D1.5 avalanche with an average crown depth of 1 ft and a width of roughly 50 ft at the top of a wind loaded gully. Slid on the 1/18 and 1/19 interface.

Jan. 19, 2019, 2 p.m. PST

Region: Stevens Pass
Observation by Jordon Foster

Did you see any avalanches? Yes
Did you trigger any avalanches? Yes
Was anyone caught in an avalanche? No

Area Description: 5,500' East aspect, immediately below ridgeline

Avalanches: Triggered a D1.5 avalanche with an average crown depth of 1 ft and a width of roughly 50 ft at the top of a wind loaded gully. Slid on the 1/18 and 1/19 interface.

Jan. 19, 2019, 1:30 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Chris H. Heli-free North Cascades

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: 30 degree tree glades, west facing with steeper treed gully feeder slopes and large rock terrain features. West facing terrain.

Route Description: Off hwy 20 East North Cascades

Weather: Snow heavy at times with 3"to 4" new snow falling since 8:30 am. Moderate gusty wind at times.

Snowpack: 10" new in morning at 5,500 feet over solar/warming crust WSW facing terrain.

Avalanches: At 7,000 feet west facing, ski cuts on several rock terrain features produced propagation results with 11" to 13" new snow soft slabs over hard crust. Fun CH

Jan. 19, 2019, 1:30 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90

Did you see any avalanches? No
Did you trigger any avalanches? Yes
Was anyone caught in an avalanche? No

Area Description: North Facing Aspect at 5400' Out of bounds of the Mission Ridge Ski area, near Stemilt Basin (North of Stemilt Basin proper).

Route Description: We believe this was remotely triggered by us (2 people and 1 dog). We had been experiencing settling/whompfing sporadically all day on slope angles 25 degrees or less. This particular one was large and we thought that it echoed. We did not know that, that particular settlement had triggered this avalanche until we continued farther along on our skin track.

Weather: Calm winds approximately 30

Snowpack: A mixed bag of fresh storm snow (8-10"), and wind slab.

Jan. 19, 2019, 1 p.m. PST

Region: Stevens Pass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Lichtenberg Mountain

Route Description: Approached from Nason creek drainage. Route to Lichtenberg summit looked too exposed, so we stuck to treed slopes on the west face of the smaller knob immediately to the south of Lichtenberg.

Weather: Light snow with periods of occasional clearing and sun; little wind

Snowpack: At lower elevations (< ~4000 ft), rain had clearly fallen on top of yesterday's fresh snow. As we moved upward, the new storm snow became less heavy but more of it had fallen on last week's crust - about 12" at ~4600 ft.

Avalanches: None, but skinning up we triggered a deep crack that propagated about ten feet perpendicular to the slope, and our initial turns down from ~4600 ft were sufficient to break off some small slabs (these did not slide more than a meter or so). Hand pits dug in this area revealed a prominent weak layer approximately 12" below the surface.

Jan. 19, 2019, 11:30 a.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Derek Van Marter

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Hairpin turn ~5300'

Route Description: Headed on W aspect toward Kangaroo Pass

Weather: Snowing

Snowpack: 200cm with recent loading on two hoar slabs. Propagation on column test (CT12) and extended column test (ECTP10) 30 cm down and again 80 cm down (CT17, ECTP25). Deep down ~140cm - we had another propagation (CT23) and with a shovel (STM).

Avalanches: Heard avalanches in the spires.

Jan. 19, 2019, 11:15 a.m. PST

Region: Stevens Pass
Observation by Marvin Kim

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Yodelin

Route Description: Skinned up road, then to saddle, up ridge to point at 5,273 and lapped.

Weather: Overcast, then scattered clouds, and light snow at times in the afternoon. Light winds with moderate gusts. Visibility good. Active wind transport visible at exposed ridge around the dead trees.

Snowpack: At 5,200 ft, SE aspect, 32 degree slope, 260cm, observed 1/15 crust 30cm, and 1/3? crust 70cm. CTE Q3 at 15cm, seemed to be breaking at layer in between two snowfalls from the previous few days. PST40/100 Arr down 30cm.

Avalanches: None observed

Jan. 19, 2019, 10:30 a.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Blewett pass, nort, ne side of dismond peak, elevation 5341

Route Description: N, ne shoulder/ ridge near diamond peak

Weather: Bkn, calm

Snowpack: New storm snow with evidence of wind transport and deposit

Avalanches: None

Jan. 19, 2019, 10 a.m. PST

Region: Stevens Pass
Observation by Kyle Johnson

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Betwixt Smith Brook Road and Lichtenwasser Lake. As well as on the ridge and terrain west of the lake.

Route Description: Ascended thru trees from SB road to Lichtenwasser, west of main drainage. Ascended ridge west of Lichtenwasser. Ski descent followed similar route.

Weather: Overcast, sometimes broken, sometimes obscured. S1-S2 intermittent at lake and above around 1pm

Snowpack: Deep trail breaking above 4200. Whumphs and shooting cracks on open slopes below treeline, sheltered by wind. Even in flatter areas. This happened on the way to Lichtenwasser Lake, above 4k. We skied along the ridge west of and above the lake with no problems even on small portions of steeper terrain. Below the lake we stayed out of open wind sheltered slopes on our way down, with only surface sluffs running maybe 6" down (not on crust) on steep terrain. Seemed like just a change in snow density... This change in density seemed observable on trees and micro-features as the top layer would break off naturaly in some locations. We didn't dig, wish we had, but I suspect surface hoar in areas typical for this problem. No problems with collapsing layers in trees, regardless of terrain. All cracks and wumpfs took place in areas open to sky and possibly wild sheltered. Especially so on rocky snow covered slopes.

Avalanches: Very small natural crown and debris around 5k S-SE on slopes west of the lake

Jan. 18, 2019, 2 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Zack McGill

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Austin Pass/Swift Creek

Route Description: Toured in the Austin Pass/Swift Creek zone riding mostly lower angle slopes sub 30 degrees.

Weather: S1 L-M winds from SE. Moderate blowing snow.

Snowpack: 2-14" of new storm snow sit atop the January rain slab. In some windward areas the new snow has been entirely scoured down to the rain slab and loaded on leeward aspects.

Avalanches: Even skiing over some steeper rolls that got to 45 degrees, did not trigger any avalanches in the new storm snow or see any cracking or signs of instability. Got good visibility of Bagley Basin on the way down from Austin Pass and could not identify any signs of recent avalanche. All debris and crowns are from the warming event last week.

Jan. 18, 2019, 11 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Andrew Kiefer

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Swift Creek, Shuksan Arm, and Hemispheres

Route Description: Tour from Heather Meadows to Austin Pass to Swift Creek. Then entered ski area to view terrain on Shuksan Arm.

Weather: S-1 with precipitation tapering off in the afternoon. Snow levels as high as 4000ft with periods of light rain below. Variable wind direction with moderate average speeds and strong intermittent gusts.

Snowpack: HS 250-300cm near and above treeline. Significant transition in snow height occurs between 3500-4000ft. Below 3500ft, the snowpack is much less developed, shallow, and heavily rain-affected. Near treeline and above 30-40cm of new snow (F-4F) overlies the 1/17 crust (P). The new snow has bonded very well to the 1/17 crust up to 4500ft where this old/new snow interface is moist. Above this elevation, the new/old interface remained dry and is more reactive. Sudden failures in stability tests occurred at this interface and just above within storm snow. Below the 1/17 crust, mid and lower snowpack layers are strong.

Avalanches: Several natural and triggered avalanches were observed on northerly aspects between 4600-5400ft. Most avalanches were small (D1) with a few larger natural avalanches (D2) visible on Shuksan Arm. These avalanches broke 1-2ft deep and up to 200ft wide. The 1/17 crust provided a good bed surface. One small storm slab avalanche was skier-triggered on a north facing convex rollover that had already been skied by several people.

Jan. 18, 2019, 9 a.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Windy Knob N to 5800

Route Description: Thorn put in a really bad skinner and we followed it. Suckers.

Weather: Strong wind shifting west to calm, high clouds, no precip, temp hovering around freezing.

Snowpack: HS 90cm, many crusts and facet/surface hoar layers. Depositional slopes skied deeper than the storm would indicate. Wind affected snow on higher West/NW slopes; mostly shallow slabs 10-20cm.

Avalanches: Stiff wind slabs could be locally triggered on steeper N/NW slopes near treeline. Failed on SH or density changes on sunny, windy aspects where SH wasn't present.

Jan. 17, 2019, 8 p.m. PST

Region: Snoqualmie Pass

Did you see any avalanches? Yes
Did you trigger any avalanches? Yes
Was anyone caught in an avalanche? No

Area Description: Snoqualmie Mountain Slot Couloir

Route Description: Skinned up Phantom Trees to the entrance of the Slot. Skied the Slot then exited via Thunder Creek and Phantom Trees.

Weather: Continuous snow, temperatures on the cusp of freezing. Calm down low with strong southeasterly winds up high.

Snowpack: By about 8pm, around half a foot of snow had fallen up high. Around 3 inches at the parking lot. On southern aspects, new snow fell on a generally supportive crust. Not much of a crust on high (>5,500') northern aspects. Breakable crust on lower northern aspects. Found a lot of wind loading on northern aspects near the ridgeline.

Avalanches: We decided to ski the Slot despite ~5 inches of new snow and obvious wind loading. A bad decision. Lots of sluff at the top that triggered a shallow (~5 inch) slab of new snow that spanned the width of the couloir just below the dog leg. Slab slid on the rain crust from last week. Debris was soft and skiable.

Jan. 15, 2019, 7:33 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Upper Columbia Powder Cartel Pablo EskiBar and Peter Larsen

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: 2 mi w. of S.S. pkng. NCH SR20.

Route Description: NxNW aspect , 4000'-5500' Broken varigated old growth terrain .

Weather: Mostly clear , no wind , 7deg. at 3500 high teens at 5500

Snowpack: Hoar frost up to 1" through out our elevation band and aspect , on 12" of dehydrateing sublimated old soft settled snow on a substantial crust capable of supporting ski pole basket pressure of 57.333 lbs.+ . Repeated basket tests produced consistant results within + - 10% . Diamond 7 grit , Rockwell hardness grade 8 tree drip ring circs. Clean in open. Feather Crystal hoar glass carpet schr. alpin .

Avalanches: Many point releases all along Delancy Ridge . looked like sun and inversion related .

Jan. 15, 2019, 6 p.m. PST

Region: Stevens Pass
Observation by Matt Primomo

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: The Swath

Weather: Valley fog up to about 3500ft, broken moving to overcast skies above. Slightly warmer above about 6,000ft. Moderate southerly winds on the ridge. Previously some snow transport but none observed today.

Snowpack: Avg depth 170cm on NE at 5800ft, though ranged from 120 to 190. Supportable crust down at 2300ft, becoming breakable with surface hoar growing over the top at about 3,000ft. 3,000 to 5,500ft prime surface hoar elevation band, with some 2cm wedges in there. No crust above about 4600ft and surface hoar gradually decreases in size as one moves up in elevation. Plenty of near crust faceting taking place underneath the thin crust, and on the surface above 5,000ft. Found the 1/3 crust down between 20cm and 40cm, thick and supportable. Where less snow exists over the 1/3, the snow has become quite weak. Where more snow exists over 1/3, the faceting appeared limited to the top cm or two on the surface. On steep southeast aspects the sun has baked the surface down to a solid melt freeze crust, and no surface hoar noted. In wind affected areas above 6,000ft the surface was a mix of wind packed particles and scalloped soft snow.

Avalanches: Northeast at 4800ft: Ski triggered D1 facet sluff on a 42 degree slope. It looked like the main path had ran, small relative to the track and stopping mid track. Appeared at least 6 days old.

Jan. 15, 2019, noon PST

Region: Snoqualmie Pass
Observation by Dallas Glass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Alpental Valley to Chair Peak and Snowlake Divide.

Route Description: Alpental Valley toward upper Chair Peak basin. Abandon original route with very poor travel conditions. Snowlake Divide. Exit Chair Peak apron. Uphill travel note. The Alpental groomers have pushed large snow bridges into the river forming wonderful easy creek crossings for uphill travel routes.

Weather: Valley Fog: 3400-4200'. Sky: Scattered high thin clouds. Temps Cold: Tair 22-26F. Winds Light, East, Blowing Snow: none. Precip: No. Cold temps and wind prevented any snow surface softening. Other than that no major weather inputs today.

Snowpack: Rimed snow surface on most open slopes above 3500'. A breakable melt-freeze crust on nearly all aspects and elevations we traveled up to 4600'. Crust 1-4" thick. Dry snow below. We didn't find any layers of concern in the upper snowpack. Photo: rimed snow surface

Avalanches: No new avalanches. Several old large avalanches from last Thursday or Saturday. Bryant Peak Couloir, Chair Peak main path, Chair Peak south hanging snowfield. All ran with large wet debris piles around source lake.

Jan. 14, 2019, 2 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Coleman Pinnacle zone

Route Description: Artist Pt - S. side Table - S. side Ptarmigan Ridge - N slope of Coleman Pinnacle - Iceberg Lake - Herman Saddle

Weather: Minor inversion to 5000ft, temps upper 30's to upper 50's. C-L West wind

Snowpack: Strong and stable. No surface hoar observed. Found 4-5mm thick ski supportable crusts on all aspects/elevations. Crust breakdown was minor on solar aspects with 5-10mm ski pen mid-day. Low elevation shady surfaces were hard and icy with fall potential. Upper elevation shaded terrain had a chalky dry surface with a bit of wind skin and temp affect. HS NTL averages 300cm

Avalanches: No notable new activity. Loose Wet instability has tapered dramatically. Recent activity under Table's south slope smaller than expected. The 1/8-10 cycle was impressive with most wind and storm slabs failing right off ridgcrest and under rocky and/or corniced terrain NTL and above. Observed over 20 older slabs to size D2.5. Cornices were large and sagging between Coleman Pinnacle and the Horn. The Glide avalanche above Herman's Boulderfield continues to show creep/glide - caution advised.

Jan. 14, 2019, noon PST

Region: West Slopes North - Canadian Border to Skagit River

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Weather: Clear

Snowpack: 1-3" crustal layer, dry snow underneath.

Avalanches: Many , possibly older, avalanches on the south and south eastern slopes in vicinity of Mt. Challenger, Luna peak, read face mountain, mount redoubt, and mount spickard around 5000'-7000'. Few on northern slopes. My. Baker relatively clear, minus one on north face around similar elevation.

Jan. 14, 2019, 11 a.m. PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by phillip gallagher

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: white pass hogback 6,200' to 5,200'

Route Description: skied two descents down to Miriam Lake on a south aspect next to the tree lines in a foot of fluffed dry powder over a hard slab/crust . Open areas had a bit of wind crust but next to the trees and in the forest all was protected. Several lines from the summit yesterday on east aspects showed the stability of the snowpack higher up near 7,000'.

Weather: sunny and cold

Snowpack: light hoarfrost crystals over a good foot of fluffed light blower powder. On wind affected areas a small crust on top of the powder.

Avalanches: none

Jan. 13, 2019, 7:40 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Zachary Winters

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Silver Star N aspects

Weather: Bluebird, mild temps (mid-high 20s in shade), no wind

Snowpack: New surface hoar formed last night, at least WNW through N aspects above 5000ft. Thin surface crust below 4200ft, even on shady aspects. At 5500ft, WNW aspect, the stubborn but energetic layer of buried surface hoar was at depth of 55cm. Above this weak layer was 10cm of likely wind transported snow caped by the early January crust. Tested for instability of the buried surface hoar layer: CTH21 sudden planar. ECT-P 22 sudden planar. Cohesive slab due to the 3cm thick crust and nice energetic propagation. Pretty decent skiing above the 4200' crust, in the shade.

Jan. 13, 2019, 6 p.m. PST

Region: Stevens Pass
Observation by Matt Primomo

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Lanham Lake

Weather: Interesting mix of cold air with fog, and warm air with sun. Top of the cold air pool seemed to be at about 5800ft.

Snowpack: Breakable rain crust up to about 5,000ft, then cold, settled powder above that on shaded slopes. 16" to 28" of recent snow overlies the supportable crust from January 3rd. The surface crust is breaking down on shaded slopes with the cold air and mostly clear nights. Weak snow was observed just underneath this crust and on the surface above the upper elevation extent of this crust. Surface hoar 3 to 5mm in size is widespread, growing in open areas above 4500ft or so. Second photo is the glimmer of surface hoar next to the skinner.

Avalanches: Two slabs that likely occurred during the storm on the 8th or 9th were observed: NW at 6,000ft appx 250ft wide (first photo). SE at 5800ft, appx 150ft wide. Crowns were mostly filled back in and debris covered up. One large loose wet that likely occurred over the past day or two was observed off Nason Ridge west of the West Camp Chutes: SSE, starting at about 6,000ft, running to roughly 5,000ft.

Jan. 13, 2019, 2:22 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Mount Cashmere

Route Description: New to area so dont know local common names for routes. Climbed Northwest ridge, traversed into Doctor Creek drainage to gain western sub-summit of Cashmere. Skied out on eastern side of Doctor creek drainage then swung back west to reconnect to sleds.

Weather: Bluebird

Snowpack: Skied Cashmere Mountain on mostly northerly aspects. Hard wind affected but supportive crust up high (>6500 ft) with small wind loaded or previous-slough pockets (none large enough to be of concern). All solar aspects below 6500 ft were sun/temp affected with crust layer. Non-solar aspects that weren't wind hardened held varying quality snow from surface hoar coated crust to 8 inchs of soft snow. All northerly aspects had growing surface hoar.

Avalanches: Saw evidence of solar related cornice failures - resulting slides were D1+ and did not propagate to buried Dec 9th or 25th layers (if they existed on that slope).

Jan. 13, 2019, 2 p.m. PST

Region: West Slopes South - South of I-90 to Columbia River

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Crystal Lakes Basin

Route Description: Boullion to Norse area

Weather: Light East wind, warm, beautiful

Snowpack: Surface hoar is building on less sunny slopes. Wind slabs are still around. Some new wind transport has covered Saturday’s tracks.

Avalanches: Observed a large avalanche in the couloir above the lake. There were two skier tracks next to it. It looks to have initiated in the upper couloir and propagated when it entered the apron. Not sure if skier triggered or natural. Skiers we spoke to skied other lines and found good snow.

Jan. 13, 2019, 1:36 p.m. PST

Region: Snoqualmie Pass
Observation by Anthony Leonarduzzi

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Backside of the tower at Gold Creek Top of a ridge where snow gets blown in

Route Description: Backside of tower of gold creek.

Weather: Sunny, blue bird

Snowpack: 5000ft elevation 208cm deep Lot of surface hoar At least 2 to 3 inches thick on surface. Little to no sun exposure.

Jan. 13, 2019, 11 a.m. PST

Region: Stevens Pass
Observation by Rio Hoshi

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Skyline Lakeshore E facing slope

Route Description: https://www.wta.org/go-hiking/hikes/skyline-lake-snowshoe

Weather: Sunny

Snowpack: Depth > 220 cm Facet layer around ~ 175 cm. Large hoar froston the surface.

Jan. 12, 2019, 4:45 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Chris H. Heli-free North Cascades

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Powder Cauche

Route Description: Hwy 20 East North Cascades

Weather: Low inversion clouds in valleys on approach roads. Sun at 6900 feet and up with rising and falling fog banks. Light wind on top

Snowpack: Wet snow (snowball)at approx 3100 ft (31 degrees at TH)becoming dryer as the climb progressed up to 6986 feet. Cold powder off the top. NNEfacing aspects. At around 5900 feet we started observing delicate rime in the all the tree branches that resembled Cactus spines. As we gained altitude these grew into larger structures that I would describe as spines with branches.Beautiful, contemplative and spiritual. (Currently no harmful noise intrusions) Nearing the top we observed carpeted soft popcorn riming on the snow surface and soft rime feathers on the ridge trees. At 4:30 pm at the bottom 400 vert, trees were dripping water and the snow had become mankalicious in nature.

Avalanches: We had observed one Avalanche that came off the lower part of the steep, typically wind loaded and corniced, rock band embedded, fall line Ridge that separates the 'bride' from the 'powder cauche', and several small surface sluffs came down sometime after my observation of the same area two days ago. We were unable to observe the exact start Zone due to speed necessity through this area on The Descent. This particular Avalanche seemed larger than just a typical snow Sluff Avalanche, as I skied next to it, and ran through a few trees with enough snow to possibly bury a skier.Ski cuts at three historical Avalanche start zones just below the top descent produced zero results. Looking towards Silver Star north facing aspects as the fog bank allowed, we were thinking we were seeing a debris field from a large Avalanche on the Lookers left side slopes of the Silver Star col above Varden creek that may have come off the rock walls and progressed through the deposition Zone Bowl stopping where this terrain becomes less steep. This sighting would may have to be verified, although our ski tour partner younger eyes could see it more clearly. Fun CH

Jan. 12, 2019, 4:33 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Upper Columbia Powder Cartel Pablo EskiBar and Peter Larsen

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Silver Star Pkng. SR20 NCH land of 60 + rigs full of Rhino hunters .

Route Description: N. aspect old growth ribs , ravines , glades , 3200 to 4500 ft.

Weather: Broken skies , 32 deg no wind .

Snowpack: Warm humid soft snow with tree bombing at T.H. to colder with no bombing at 4500 ' Soft snow 8" down to firmer base . No pit profile, no cracking ,woomphing , or propagation from rollover ski cut attempts on small features. But wide spread roller balls , pinwheels, tree ring bomb cratering in evidence . Clean in openings .

Avalanches: Older point realeases on Delancy Ridge.

Jan. 12, 2019, 4 p.m. PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by Steve Gately

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Crystal Mountain Backcountry

Route Description: Dogleg Area to Pickhandle Point

Weather: Clear skies, 34F in the parking lot at 9:00AM, North faces above 5,500 stayed below freezing all day. Ridge top winds moderate (20MPH) out of the South all day. Winds in the basins were light. Despite moderate ridge top winds no wind transport was observed.

Snowpack: I dug a small test pit at 6,000ft on a 30 degree West facing slope. Compression Test results were CTM15 Q2 RP 30cm down. This result was failing on a density change which occurred from fluctuating freezing levels during the Jan 8 - 10 storm. This is illustrated in the profile photo below. I also dug a quick hand pit at 6,300ft on a 36 degree Northwest facing slope. Those results were Hand-Hard Q3 30cm down on decomposing stellars. Despite the lack of a significant natural wind slab cycle or observations of skier triggered wind slabs we still very much have a strong over weak concern in the upper pack and this is illustrated well in the profile photo below. Luckily for us, 30cm down is a pretty easy depth to dig with a hand and identify if it still exists or not. Don't be shy! The most note worthy observation of the day though was the presence of FCsf (Near Surface Facets) on all West through NNE facing terrain. above 5,500ft. Not a concern at the moment but with cold and clear nights on the docket for the next several days these little guys will continue developing. This is worth monitoring ahead of a strong low pressure system moving in Thursday (Jan 17) forecasted to bring up to an inch of water through the weekend.

Avalanches: Small natural wind slab from Jan 9/10 observed South of Pickhandle Point across Morse Creek on an unamed point. Elevation roughly 5,800ft on a North facing slope.

Jan. 12, 2019, 3:03 p.m. PST

Region: Snoqualmie Pass
Observation by Anthony Leonarduzzi

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Dead end road. Open slope. Logging landing. Next to an avalanche shoot

Route Description: Off shoot of FR4936

Weather: Sunny / fog

Snowpack: 152cm deep

Avalanches: Natural

Jan. 12, 2019, 2 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Roland Emetaz

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Holden Village, elevation 3200

Weather: Overcast, calm

Snowpack: Total snow depth: 152 cm At 107 cm: ice layer, likely developed on 1/3/19 during freezing rain event. Could not cut ice layer with snow saw during extended column test. Had to use wood saw. Another weak layer at 42 cm, likely buried surface hoar. No facets were observed at ground level. 20 extended column tests were performed by students of avalanche awareness class. Failure on both weak layers at ECTN23 to ECTN26. Pictures were taken during class exercise doing extended column tests. Ice layer(s) very vivid in pictures.

Jan. 12, 2019, 1 p.m. PST

Region: Mt Hood
Observation by Mt Hood Backcountry Ski and Avalanche Inst. None

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Weather: Clear and Sunny. Very light winds. No snow transport.

Snowpack: Shooting cracks from ski tips on wind slab that was on non-consequential terrain. 7000K Hasty tests were done at tree line 6500ft. CT12Q2@25cm from the surface CT18Q2@45cm from the surface ECTX

Jan. 12, 2019, 12:30 p.m. PST

Region: Snoqualmie Pass
Observation by Forest McBrian

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Alpental Valley

Route Description: We visited the Thumbtack in Chair Peak basin. We reached Source Lake avoiding the ski area backcountry exit track; we followed an old track right of the waterfalls and avoided most of the crowds. Saw a pine marten!

Weather: Valley fog persisted all day; we climbed out of it around 4,900'. Light winds out of the east once we rose above Snow Lake divide. Inversion and fog kept things cool in the valley, and temps were a little cooler than forecast above.

Snowpack: 1 to 1.5 cm pencil-hard rain crust over the 50-80cm of 4 finger decomposing fragments and rimed particles (the good skiing from earlier this week). Below, a series of strong crusts and layers of rounds. Our crust was very breakable and almost skiable in places, but another guide reported a completely supportive crust in Big Trees and in Pineapple basin. A series of compression tests showed very easy to easy sudden planar fractures on a layer of 1.5mm faceted grains down 30cm–worth watching this layer.

Avalanches: Roller balls and pinwheels during the peak of the day's heat and solar radiation, but only briefly. Debris from D2 avalanches on the upper Source Lake apron suggested a cycle occurred when the rain arrived, or perhaps as recently as yesterday.

Jan. 12, 2019, noon PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by Dallas Glass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Area near White Pass ski resort

Route Description: Gun Sight Peak, with views into surrounding terrain.

Weather: Cool Temps. Winds: East ,Light. Pass Level fog to 4800'. Skies: Clear to few clouds. High level clouds moving in during the day.

Snowpack: 12-24 inches of dry snow over a very firm and thick ice layer formed Dec 28/29. Surface snow , right-side-up, with increasing resistance to ice layer. Wind redistribution of the snow from several strong wind events over the last week. Old wind slabs and drifts could be seen on lee slopes. SE-S slopes produced rollerballs at all elevations around 1200hrs. No loose wet avalanches. But maybe they occurred after i left the field. Photo: Wind textured snow and the exposed ice layer within feet of each other on a ridge line at 6200'.

Avalanches: No recent avalanches. We had great visibility into the surrounding terrain and couldn't see any recent slides.

Jan. 12, 2019, 11 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Andrew Kiefer

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Heather Meadows/Bagley Lakes

Route Description: Circumnavigation of Table Mountain

Weather: Sunny and warm. High of 49 degrees F at Heather Meadows. Strong temperature inversion in place. Light southerly winds.

Snowpack: HS ranged 230-300cm between 4200-5400ft. 01/08-10 storm event left deep rain runnels to 4800ft and a smooth refrozen snow surface above. Supportable 5cm rain crust (P hardness) dominated the snow surface at all aspects and elevations observed. This crust caps about 30cm of moist snow from the 1/8-10 storm made up of rounded grains and additional rain crusts (1F to P hardenss). The recent snow is consolidated and well bonded to old snow layers. No fractures in stability tests. Skipen 0cm, Bootpen 20cm. Overall, the snowpack is deep and strong.

Avalanches: Most avalanches observed on Saturday were an est. 72hrs old, but several recent wet loose avalanches occurred in the afternoon on steep E, S, and W aspects. The aftermath of 1/8-10 storm/avalanche cycle was impressive. The largest avalanches failed on northerly wind loaded slopes between 4800-6000ft. Some of these avalanches propagated over 1000ft wide. Many had wet characteristics. Some were triggered by cornice fall. One glide avalanche was observed on the S aspect of Herman.

Jan. 12, 2019, 10:45 a.m. PST

Region: Stevens Pass
Observation by Cody Gillenwater

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Yodlin

Route Description: Starting at the Yodlin lot, up the old road, to the saddle between peaks 5272 and 5023.

Weather: Overcast to partly sunny, temperatures around 30 degrees, minimal wind

Snowpack: Lower elevations on the road up had a slight rain crust, with 6" of moderately dense snow underneath. At upper elevations, on North-facing slopes there was 8-10" of soft, dry snow with no crust. South-facing slopes had a moderate sun crust with evidence of loose-wet ski slough from the prior day or two. No evidence of wind crust or drifts along the saddle.

Avalanches: No avalanches observed.

Jan. 11, 2019, 7:04 p.m. PST

Region: Snoqualmie Pass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Mt. Snoqualmie

Route Description: Skied the Slot via standard route, out Phantom trees

Weather: Gradual clearing throughout the day, moderate and gusty breeze NTL. Warming not a factor.

Snowpack: Heinous trap crust on S aspects, all elevations, producing horrifying skiing. Sheltered N aspects skied much better but wind effect was universal.

Avalanches: None observed besides remnant loose wet debris from previous day. Dropped cornice at Slot exit produced no results. Small sloughs in the slot but zero reactivity even in wind-loaded and convex roll at the top.

Jan. 11, 2019, 2 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Jamie Tackman

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Mission Peak

Weather: Broken to Overcast, with patchy ground fog, calm winds, below freezing.

Snowpack: After seeing M.Primomo’s report yesterday, I was surprised how big the results were in the ski area. My assessment during the storm lead me to believe it was more stable than that, so I wanted to get out and take a look. HS 110, CT 3 Q2, was a real surprise, the Jan.3/4 rain crust (down 20 cm) had a 2.5 cm layer of transformed snow underlying it that was very reactive. The overlying snow is quite durable, but if you did find a weak spot, that transformed layer could fail quite easily.

Jan. 11, 2019, 12:30 p.m. PST

Region: Snoqualmie Pass
Observation by Jeff Tarshis

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Snoqualmie. Pass, South Fork Snoqualmie River, NW of Source Lake Elev: ~3860ft Slope Aspect: SE

Route Description: Winter trail to Source Lake

Weather: Sky: X patchy-dense fog Precip: NO Air T: N/O : ~freezing @0930 : ~ above freezing @1230 Visibility: 40m-70m Wind: L SE

Snowpack: 195cm pit, Probe suggested HS 285cm. Slope angle ~33deg ~1cm Pencil crust on ~50cm 4F to ~5cm Knife+ Jan 5th crust CT21(BRK/Q3) @~47cm in Jan 6th snow.

Avalanches: Observed numerous recent WL ranging from D1-D2 seen BTL-ATL on N and S aspects. Potentially occurred during Jan 10th temp spike? Limited visibility and a short day prevented getting eyes on higher elevation snow surfaces.

Jan. 10, 2019, 3:30 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Chris H. Heli-free North Cascades

Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Powder Cauche

Route Description: Off hwy 20 east side NC

Weather: Mixed cloud, sun, low fog Zero to light breeze at top

Snowpack: 6" to 8" new, wind packed at ridge

Avalanches: Saw two fresh surface sluffs in the lower "scared larch grove". one appeared to come off fall line Ridge loaded area that separates the "bride" from the "powder cauche" and occurred skiers left of the previous Avalanche i reported. I have to say the larger of the two surface Sloughs ran a bit under 300 vertical feet in this 35 degree slope and ran through some trees with some piles on the uphill side of the trees so it could have been harmful but I'm not going to give it a D2. Maybe a D1.685527. CT5 new snow. Q2 shear at lower crust, moderate. Ski cut 40 degree roll near top ridge, no results. Watch out for those Montana Trail poachers. :) although they are carrying good beer and peanuts. Fun CH

Jan. 9, 2019, 4:15 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Brandon Bertelsen

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Delancey at about 5600 ft. South southeast aspect. Near tree line. Middle of rib.

Route Description: We skied up to about treeline and back down near the skin track.

Weather: Light to moderate snow throughout the day. For a little bit we could see part of silver star and the liberty bell group. Then the clouds lowered.

Snowpack: We dug a snow profile on a 27 degree slope at 5600 ft SSE aspect near treeline on the middle of the rib. We didn’t see any signs of wind transporting snow. Though the top inch or two of snow was slightly more dense than what was below it, a very soft slab. At about 40 cm there was a 5 cm crust. This was thicker and closer to the surface lower down in elevation. At about 65 cm we found surface hoar which collapsed at 22 and 23 hits in a compression test. In two extended column tests this neither collapsed nor propogated. When pulling with my shovel it roughly broke and slid, in the photo.

Avalanches: No signs of avalanches. No shooting cracks or whoomphing.

Jan. 9, 2019, 1:41 p.m. PST

Region: Snoqualmie Pass

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Snoqualmie summit hyak

Route Description: 60 degree aspect, 3658 ft, 20 degree snow slope

Weather: Overcast, snowing, 30F air temp, 31F snow surface temp. Wind NE 0-5 with gusts 6-8.

Snowpack: 20cm new on top of 20cm slab. Varying levels of new on top of slab during skin up. Pit demonstrated slab approx 20cm down and approx 20cm thick.

Avalanches: n/a

Jan. 9, 2019, 1 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Jamie Tackman

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: Mission Peak

Weather: Sky obscured, snowing, wind WSW ~25 G 30 in exposed areas. Temp. below freezing to around 5000 rain below.

Snowpack: Heavy consolidated snow, some evidence of wind slab, but not reactive. The 1/3-4 rain crust was noticeable in some areas(and supportive) but buried in wind deposit zones. Skied slopes =35 with no sign of weakness , new snow seemed well bonded. Elevation 4570 to 6500.

Jan. 9, 2019, 7 a.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Nate Hough-Snee

Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an avalanche? No

Area Description: E/NE slope, to 38 degrees, <3800', Icicle Creek area

Route Description: Smash and grab

Weather: OVC, NO, Calm, None, -2 and rising.

Snowpack: HS 45-85cm. HST 20cm. MFcr had poor bonds with recent storm snow. Wind slabs formed by east winds on N/NW aspects as deep as 45cm. Slabs were reactive in skin track and skiing. Plenty of cracking, one sudden ~10m collapse. Didn't formally dig/test for any near surface facets from early Jan snow events, so my ob of storm snow on melt-freeze may be a false negative for weak layer presence. Red flags: Cracking and poor structure with recent wind slabs on MFcr could be an issue. Upcoming warming to 7000'+ snow line should naturally sort it out on steep, low elevation slopes. Get the soft goods while they last.

Avalanches: Small wind slabs running locally (picture)