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Observations

March 21, 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: Rainy Pass from Lake Wenatchee

Weather: Warm, scattered high clouds with a light breeze.

Snowpack: On a steep southeast aspect at 4,400ft found water had made its way all the way through the snowpack. Could not initiate loose wet slides from the top of a road cut at 15:00, but was unwilling to go onto any steep similar slopes as boot pen was about 60cm. On northwest at 4,400ft, upper 10cm of snowpack was wet, with moist snow down to about 40cm. Boot pen 35cm. Found the 2/8 layer down 80cm with still easily identifiable surface hoar and rounding facets. Something to keep in mind later this spring when water does make it down to this layer. Much of the upper north facing slopes off Rock Mtn, Mastiff, and Howard look clean, though anything steep with an east, south, or west aspect likely has debris in it.

Avalanches: No very recent slides observed, but these likely occurred earlier in the week or last weekend: A handful of large loose wet slides had crossed the Smithbrook rd below Union Peak on South aspects at about 4,200ft. Debris was large and chunky as these slides gouged into older snow. A few large loose wet slides in some southeast slopes above Smithbrook rd just east of Jove Peak. These didn't come down to the road, but they did have some snowmobile tracks near them. Southeast side of Dirtyface had some very large, and fairly long running loose wet debris which gouged to near the ground. Some smaller loose wet off a northeast aspect of Nason Ridge above Lake Wenatchee at about 3,800ft.

March 20, 2019, 1 p.m. PST

Region: Mt Hood
Observation by Ron Martin

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

Area Description: White River Canyons

Weather: Sunny, warm, windy

Avalanches: Loose wet

March 20, 2019, 1 p.m. PST

Region: Mt Hood
Observation by Ron Martin

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

Area Description: White River Canyon

Weather: Warm, sunny, windy

Avalanches: Wet Slab

March 20, 2019, 1 p.m. PST

Region: Mt Hood
Observation by Ron Martin

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

Area Description: White River Canyon

Weather: Warm, sunny, windy

Avalanches: Wet slab

March 20, 2019, 8 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: Saddle Rock - Under Old Butte

Weather: Snny and 60 degrees

Snowpack: Sun baked

March 19, 2019, noon 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: Mt. Baker NRA

Route Description: Railroad Grade/Lower Easton Glacier with an intentional exit from the field by early afternoon.

Weather: Clear skies and sunshine. High temperatures in the mid 60's at the 4000ft level. Moderate NE winds with strong gusts above 6000ft.

Snowpack: The snowpack is thawing and transitional. Overnight refreezes since 3/15 have been weak and superficial below 6000ft. The top 80cm of the snowpack on E-S-W aspects is wet/moist. Meltwater percolating through the snowpack is starting to break down 3/11 (down 30cm) and 3/6 (down 50cm) interfaces (both MFcr transitioning to MFsl). On solar aspects, 3/11 and 3/6 are both slightly wetter than adjacent layers. Above 5500ft, only the top 10cm of the snowpack are moist and dry snow exists below. Steep and shady N and NE slopes still have dry snow surfaces above 4500ft. Below 3/6, the snowpack is strong and consolidated with alternating layers of MFpc, MFcr, and RG. HS 350-400cm above 4000ft.

Avalanches: Portions of almost all slopes 40 degrees and steeper facing E-S-W-NW between 1500-6000ft have produced loose wet slides, primarily to size D1 with several size D2. A handful of snowmobile triggered slides occurred over the weekend. A natural icefall avalanche that looked several days old pulled out shallow wind slabs on a south-facing slope at 6500ft, and several wet loose slides ran naturally off the ice formations more recently (photo). The wet loose cycle has been slow to run its course with ongoing wet activity since 3/13. Wet loose activity may have already peaked but will likely continue. No new avalanches were observed on Tuesday before an early field departure at 1:30pm.

March 18, 2019, 10:30 a.m. PST

Region: Snoqualmie Pass

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

Area Description: Snoqualmie Pass. Commonwealth basin. Picture is looking up west face of red mountain.

Route Description: Morning tour in commonwealth basin. Exited avalanche terrain by noon.

Weather: Sunny clear skies with gentle gusts.

Snowpack: Rapidly warming snowpack with poor overnight freeze.

Avalanches: Numerous loose wet avalanches observed on all aspects at and above treeljne. Picture shows myriad small rollerballs, loose wet avalanche runout, small wet slab.

March 17, 2019, 2:15 p.m. PST

Region: Snoqualmie Pass

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

Area Description: Alpental Valley

Route Description: Chair Peak/Source Lake Apron. Upper Chair Peak to large bowl uphill/due west of Source Lake.

Weather: Warm and sunny. Light winds. Temp 47 degrees Fahrenheit per Alpental mid mountain at 14:00.

Snowpack: Upper 1-1.5ft of 5 day old storm snow had turned to very wet heavy slush on solar aspects.

Avalanches: D1 loose-wet broke off upper slopes of Chair Peak, off 100ft cliff, and stepped down/gouged apron above upper Source Lake Apron chute. Turned into D 2.5+ wet avalanche which traveled 2/3 the distance to Source Lake and filled the bowl. Debris 4-6ft tall with larger chunks. Ran from ~6000ft to ~4200ft. Narrowly missed 3 snowshoers and dog. Still plenty of similar undisturbed storm-snow turned slush and large cornices in upper slopes of Alpental Valley.

March 17, 2019, 2 p.m. PST

Region: West Slopes Central - Skagit River to South of I-90
Observation by Rusty M

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

Area Description: Mount Pugh off the Mountain Loop Highway

Route Description: White Chuck to the Straight Glacier (Stujack)

Weather: Clear and sunny with a light breeze. Very warm temps that felt uncomfortable in the sun.

Snowpack: Wet snow surface on all elevations and aspects except steep north in the high alpine. Many rollorballs notes from the previous day but we saw limited activity during our travels. Had to bail on our objective in the early afternoon due to the overhead hazard posed by even wet loose avalanches. Likely to see additional activity in the area after we left and later this week with the extended warming cycle.

Avalanches: Several smaller D1-D1.5 wet loose slides and many roller balls had slid into the chute previously, likely on 3/16.

March 17, 2019, 12:30 p.m. PST

Region: East Slopes South - South of I-90 to Columbia River
Observation by Scott Shively

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

Area Description: Divide Ridge, Jumpoff Lookout

Weather: Sunny, warm, clear

Avalanches: Numerous loose wet avalanches on west facing slopes on Divide Ridge, one running 100m+ with large debris pile

March 17, 2019, 12:30 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: ~1 mile east of Worms Flow on Mt St Helens, East facing aspect. Many snowmobile tracks

Route Description: Worms Flow (saw avalanche remains from distance).

Weather: ~60-70F and sunny

Snowpack: Corn cycle

Avalanches: size 3

March 17, 2019, noon PST

Region: Mt Hood
Observation by Sarah Brown

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

Area Description: Pocket Creek/Gunsight ridge area, east of highway 35 and slightly north of Mt Hood Meadows. The avalanche was observed on a steep Northeast facing slope, at approximately 4,700' elevation. Lat/Long coordinates: N45.296345 W121.605802

Route Description: Observed skier appeared to approach on a ridgeline via road NF3550, and descended the slope to an unnamed road below in the pocket creek drainage.

Weather: Winds calm, visibility unlimited, sky clear, temperature approximately 45 degrees Fahrenheit.

Snowpack: Thick ice crust on top of softer snow at our west facing location, approximately 1 mile from the northeast facing avalanche location

Avalanches: Two avalanches observed on the same slope. We did not see the actual slides occur, but we saw the untracked slope during our uphill touring, then saw that the slope had been skied and had slid while we were digging a pit for our own snow tests. Observations of first avalanche: Skier made 3 turns then the slide appeared to originate at the location of the 4th turn. Lower down the slope a track shows the apex of a completed turn, but the rest disappears into the slide path. Runout path was directly into a grove of trees. We saw no human activity or evidence of any other skier and became very concerned, but shortly thereafter observed a solo individual hiking up the bed surface of the avalanche with their skis on their back, apparently unharmed. To our complete surprise, about thirty minutes later we looked at the avalanche slope and saw that the skier had skied it again, and triggered a second avalanche at the same exact elevation where the first one released, only slightly more to the east. Again, we saw the individual boot packing up the hill on the bed of the first avalanche path, and they proceeded to ski the slope a third time, with no further slide activity. At this point we departed the area and could no longer observe the avalanche location.

March 17, 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

Area Description: Stetattle Ridge

Route Description: Sourdough Mtn to PT 6728

Weather: Sunny and warm

Avalanches: Several loose wet slides observed on S and E facing slopes on Stetattle Ridge Sunday morning. We could hear them happening once every five minutes or so after 10 AM. Large slides on Luna, Fury, Ruby, and Redoubt (visible from 10+ miles away).

March 17, 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

Area Description: Stetattle Ridge

Route Description: Sourdough Mtn to PT 6728

Weather: Sunny and warm

Avalanches: Several loose wet slides observed on S and E facing slopes on Stetattle Ridge Sunday morning. We could hear them happening once every five minutes or so after 10 AM. Large slides on Luna, Fury, Ruby, and Redoubt (visible from 10+ miles away).

March 17, 2019, 11:30 a.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? Yes

Area Description: Lane Peak in the Tatoosh Range of Mt. Rainier National Park

Route Description: The Zipper on the north face of Lane Peak

Weather: Warm, clear, and sunny though the route was shaded throughout our climb and the day.

Snowpack: Consolidated base with loose snow on top and a thin crust early in the day. Older pinwheels and rollers where seen on sunny slopes.

Avalanches: A moderately sized loose wet avalanche caught my party of two and another pair near the top of the route. It appeared to have traveled down a side gully before entering the main chute. One person was able to hold one, a second was swept about 20 feet and two others were carried a few hundred feet down. All parties were uninjured. My partner and I finished the climb as the quickest way to get out of the chute. The southern facing descent route was a complete debris field, which we crossed as safely as quickly as possible. After we crossed we witnessed another moderately sized loose wet avalanche within the debris field. On the rest of our descent we saw active rollers and pinwheels.

March 17, 2019, 11 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Christian Clerc

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

Area Description: Baker Ski Area

Weather: Sunny, clear skies, no wind, 50 degrees near Austin Pass

Snowpack: Soft water logged including shady aspects

Avalanches: Roller balls and frequent loose-wet avalanches on all aspects throughout the day.

March 16, 2019, 6:39 p.m. PST

Region: Snoqualmie Pass
Observation by Patrick Mauro

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

Area Description: Pineapple Basin

Route Description: Established skin track to Source Lake. Toured up directly from Lake to Pineapple Basin and up to Pineapple Pass.

Weather: sunny with very thin clouds

Snowpack: 6-12" of powder in the shaded regions, but 2-3" of sometimes punchy sun crust over powder anywhere that gets decent solar input, i.e., all but N aspects

Avalanches: Small to medium-sized snow clumps - not quite cornices per se - dropping from ridgeline to looker's right of Pineapple Basin. Activity started immediately after the morning sun hit the top of the ridge W/NW of The Tooth and continued throughout the day. Evidence of larger instability in the days since the mid-week storm, including numerous areas where small wet-loose slides have been kicked off by snow sliding of ridge-tops. IMO, it would be wise to avoid travel right underneath such features.

March 16, 2019, 4 p.m. PST

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

Route Description: Chiwaukum Traverse

Weather: Warm with high clouds, no wind. Weak overnight freeze.

Snowpack: On north at 6800ft: Found a layer of buried surface hoar (5-8mm) and facets (1.5mm) down 15-25cm. CTE SP in two different spots on a slope. Found this same layer down 20cm on east at 6700ft. Bailed on Chiwaukum Traverse due to this and wet loose concerns. Cornices looking large and ready to go in this area as well. Below 4800ft on South and east the snowpack was full isothermal and “trap door” conditions easy to find, sinking through to the ground.

Avalanches: Wet loose cycle on Friday observed on E-S-W aspects at all elevations to D2. Some of these gouged into old snow or even on the ground in places. Would suspect this continued today but we were outta there. One recent D1.5 likely on the surface hoar layer on East at 6800ft below Grindstone Mtn by small cornice fall. Appx 20cm x 10m wide. A couple of large (D2) slides likely from last wind event off east facing slopes of Cape Horn. Crowns blown in and hard to see well.

March 16, 2019, 2 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: Stemilt and around Wenatchee Mountain

Route Description: Mission Ridge to 6700', N/NW

Weather: Clear, calm, cool in the AM to balmy PM. Above freezing on ridgelines

Snowpack: Cold pow, hot pow, sastrugi, corn, breakable, supporting. Appears we're entering the transitional period from winter to spring.

Avalanches: D1-D1.5 wet point releases on solar aspects.

March 16, 2019, noon PST

Region: West Slopes Central - Skagit River 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: East facing slope, steep and open, very sun exposed.

Route Description: Final switchbacks up to the lake where the trail starts to opens up.

Weather: Clear and sunny.

Snowpack: NA

Avalanches: An avalanche (likely loose wet) released from above and ran onto the trail switchbacks at 3 different locations at roughly 2200 ft. Lake Twenty-two level is 2400 ft. Luckily no one was caught. The debris piles were up to waist deep on the trail.

March 16, 2019, 9:30 a.m. PST

Region: Mt Hood
Observation by Travis White

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

Area Description: Newton drainage, west facing slope.

Route Description: Skinned up west ridge above Newton drainage. Laps on east facing slope just above tree line. Back to HRM via meadows resort.

Weather: Mostly sunny, warm 40+ degrees.

Avalanches: Saw evidence of natural loose wet D1+ avalanche on west facing slope. Possible it slid on 3/15 or before.

March 15, 2019, 8 p.m. PST


Observation by Jeremy Allyn

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

Area Description: Crystal backcountry

Route Description: Bullion Basin - East Peak - Lake Basin

Weather: Rapid warming low-mid elevations. Highs of 37F above 6500ft by late morning...highest ridgetop temps since Feb 1st. Increasing cumulus buildup through day. Intense solar affect at surface on sunny slopes. Light variable winds

Snowpack: Recent storm layers continue to slowly settle and become more cohesive on shady aspect slopes near treeline, though remained dry through day. All other aspects and elevations moist by mid morning with any diurnal surface crusts breaking down quickly. NOTE: snowpack test results in both Lake Basin and Cement Basin highlight the 3/6 interface weakness is persisting and capable of propagating a fracture on North aspects. 6470 ft, N, 35 deg planar slope above Lake Basin, CTM 19, sudden planar, down 32cm. ECTP 13 same layer. 6380 ft, ENE, 32 deg mid slope trees off East Peak in Cement Basin, CTH, sudden planar, down 37cm. ECTP 21 same layer.

Avalanches: 3 small natural D1 slabs observed on SW, ~6500ft, failing on steep features above small cliffs across valley from East Peak. A few Loose Wet D1 slides on ESE, 6600, Norse Peak/Scout Pass zone.

March 15, 2019, 11:15 a.m. PST

Region: Mt Hood

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

Area Description: Polallie canyon NE face Mt. Hood- observed that 3 loose wet slides occurred on Thursday afternoon. Slides were not in the path of travel, but rather in the adjacent terrain trap leading into Polallie Creek.

Route Description: Tilly Jane North via trail to Cooper Spur Stone shelter.

March 15, 2019, 10:45 a.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: South Frog Lake Butte

Route Description: Sno-park to the saddle (4750'), onward to the top of the south butte (5300'), through mature forest. This observation was taken at a flat spot at 5300'.

Weather: C winds with L gusts from ESE, -FEW clouds, 5 deg C temp, NO precip, NONE blowing snow

Snowpack: HS 245cm, PS 5cm, PF 25cm. Highly variable snow surface conditions below treeline. The majority of terrain under tree cover consisted of tree bomb, icy, irregular lumps. Spots that had yet to be tree bombed held decent soft snow. Areas with larger openings in the canopy had a 2cm thick breakable sun crust with what appeared to be 1.5-3mm facets on top (see photo + video). The biggest hazards were skiing the abhorrent snow conditions, and moving beneath the hundreds of trees each holding a giant Sword of Damocles (huge balls of heavy snow that haven't yet fallen off).

Avalanches: None observed.

March 14, 2019, 5 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Gregg Oliveri

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

Area Description: Grouse Creek approach to the "rod" at the top of Heliotrope Ridge.

Route Description: Snowmobile approach from Glacier to 3,500 ft. parking lot. Direct approach up Grouse Creek to west end of Heliotrope Ridge.

Weather: Cold (mid 20's) with strong SW winds 15-25 mph through morning and early afternoon. Winds dropped later in afternoon. Partly cloudy. Temperatures increased markedly by mid afternoon.

Snowpack: Overnight winds transported snow from ridge top to North Facing slopes (7,000 ft). Ridgetop north slopes had a 4-5 inch wind slab that was well bonded to underlying snowpack. Ski cuts and hand shears were not reacting. Got one shooting crack on a north facing slab on a 20 meter 35* plus slope. Ski quality was good in sheltered bowls 1,000 ft below ridge. Lower elevation snow in Grouse Creek was more wind affected from the overnight and morning winds. Snowpack in lower Grouse Creek was dry powder in the AM and wet and warm in the afternoon. Spring is coming.

Avalanches: None observed. A few pin wheels on south facing slopes from the day before.

March 14, 2019, 5 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

Avalanches: Triggered a small loose wet slide at 4pm on a 3400 feet on a NNE aspect, sparsely treed. Consolidated powder from 4700-3500 ft. Mild to moderate wind effect at ridgelines. Heavier, manky snow from 3500-2600 ft.

March 14, 2019, noon PST

Region: Snoqualmie Pass
Observation by Dallas Glass

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

Area Description: Alpental Valley: Great Scott Bowl

Route Description: Alpental ski area, to Source Lake via the S. Fork of the Snoqualmie route. Source Lake up Big Trees, to Great Scott bowl and Pineapple Pass. Return via Big Trees.

Weather: Overcast skies with mainly thin clouds. Filtered sunshine was strong enough to affect the snow surface. Temperatures were cold in the morning and quickly warmed up around 11. Winds were light and variable. No precipitation.

Snowpack: Recent storm: 25-30cm on new snow. Generally light and unconsolidated (fist +). New snow over 3/11 interface, 2mm needle-like facets over firmer settled snow. Tilt tests in profiles easily highlighted this layer. Wind affect: some wind effects in exposed areas and near Pineapple Pass. Subtle wind drifting of snow into 4F- 4F+ slabs. Sun affect: 2-4cm breakable melt freeze crust on mainly SW-W facing slopes. This matches the morning clouds at Snoqualmie Wednesday which limited the sun effect on the snow surface.

Avalanches: Slab avalanches: 8 natural slab avalanches, likely from Tuesday night/Wednesday morning. W-N-E aspects, 4400-5400', 25-30cm deep, 40+ degree planar slopes. SS-N-D1.5-R1-I. Three skier triggered slabs from Wednesday. W-NW aspects 4600-4900' 25-30cm deep. 40 degree convex and planar slopes. SS-AS-D1-R1-I. Crown profiles and nearby snow profiles indicate these slabs failed on a layer of 2mm facets at the base the storm snow. Loose: 10 loose wet avalanches to D1.5 were seen on mainly S-W aspects. 4000-5000' >40 degree slopes. Likely from yesterday. L-N-D1-R1-N

March 14, 2019, 11:30 a.m. PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by Kat Parks

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

Area Description: Bowl east of Mazama Ridge

Route Description: Toured Golden Gate trail, dropped down to Paradise River, up to Mazama ridge and skied the east aspect of the bowl.

Weather: Low 30s, partly cloudy, partly cloudy in morning, flat light around noon and brightened up in the afternoon

Snowpack: dry in the morning, got heavier throughout day. Felt/saw some wind affected areas.

Avalanches: Noticed a crown on the far east side of the bowl, SSE aspect. Saw single point, probably from tree/cornice, that released a slab. The light was terrible so I outlined the crown and flanks in red and the debris field in blue. Probably from previous day.

March 14, 2019, 10:30 a.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Zack Jessel

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

Area Description: North aspect Fernow

Route Description: Big Creek to Fernow

Weather: Sunny 25F

Snowpack: Weak layer about 18" down. Failed consistently about CTS 23-25 at the 18" layer. Forecast was for moderate at all elevations, we felt that was about right but we're wary of the pwl.

Avalanches: Remote triggered a 150' wide about 3' crown from above and couple hundred feet away on a convex rollover. A large whoomp triggered it. Ran with energy. We had a few more whoomp events in more conservative locations the following days but no avalanches. Solar aspects shedding like crazy as expected throughout warming cycle.

March 14, 2019, 9:30 a.m. PST

Region: Snoqualmie Pass
Observation by Kurt Mehrer

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

Area Description: Stanpede Pass, power lines

Route Description: Snowbike

Weather: Cloudy 28 degrees

Snowpack: 1” crust over 70cm of 4 finger hard snow. Total snow pack 120cm. Surprise to see that much crust after snow 2 days ago.

Avalanches: Small wet slides probably from yesterday when it warmed up.

March 13, 2019, 11:15 a.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, below treeline

Route Description: NNW aspect, 4400'

Weather: 0 C temp, BKN sky, S-1 precip, L wind, L blowing snow

Snowpack: HS >270cm, PF 75cm, PS 35cm. Snow appeared lightly wind-effected in open areas and treed terrain alike. At ridgetop there were small cornices that were built from W winds that were not there on Monday. Also despite seeing large surface hoar everywhere in the same area on Monday, I did not investigate whether it was still present beneath the new snow. HST was difficult to gauge in open areas as it appeared to blend seamlessly with the snow from the last storm, but in treed areas was around 60cm on top of tree bomb crusts.

Avalanches: Loose wets aplenty after 10am on steep sunny slopes beneath trees/rocks. No slab avalanches observed.

March 10, 2019, 2:30 p.m. PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by Andrew Goodwin

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

Area Description: Mt St Helens.

Route Description: Steep valleys along the Worm Flows route on the south side of the mountain. Elevation: above tree line. 4500 feet altitude

Weather: Calm clear and upper twenties following a much colder morning with strong winds out of the NE

Snowpack: Shallow fresh wind slabs on steep SE aspects.

Avalanches: Two small skier triggered shallow slab/loose wet avalanches. One carried a skier 30 feet down a steep slope. The skier was able to self-rescue.

March 10, 2019, 10 a.m. PST

Region: Mt Hood
Observation by Jack Dwyer

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

Area Description: This was on the NE aspect of Elk Mountain. Near 5520ft in elevation. The specific area of the incident is treed but they are all dead.

Route Description: Skinned up the northeast ridge of Elk Meadows. Skied down the southest face of Elk Mountain

Weather: To forecast. Sunny. Started cold and warmed up. Windy on ridge.

Snowpack: New snow on settled snow. Southern aspects were starting to feel the effects of two days of sun. Minimal signs of loose wet before noon.

Avalanches: Avalanche started on a rollover that was near 35 degrees. Crown was about 1 foot deep and propagated 90 ft. What is not in the picture, is debris went down about 180ft down the northeast slope of Elk Mountain. From viewing avalanche bed, there looked to be surface hoar on a slight crust. Likely happened on 3/9/19.

March 9, 2019, 5 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: Roaring Ridge

Weather: Sunny

Snowpack: Fast moving sluff / loose slides on non-solar aspects, could be an issue in consequential terrain.

March 9, 2019, 1:30 p.m. PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by Ryan Minton

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

Area Description: Crown Point/Pickhandle Ridge

Route Description: Ascended and skied W aspect off Blue Bell Pass, then over to Pickhandle Ridge N aspect.

Weather: Partly cloudy, light winds, no precip.

Avalanches: Loose dry entraining surface snow on steep terrain. S and W aspects warmed and fresh snow (8-10 inches) became heavy as the day progressed however no slab releases on ski cuts (small roller balls). NE aspect at 6200 foot convex ridgetop produced 40 foot wide wind slab release 12-16 inches deep on ski cut, ran through trees and entrained snow in it’s path, moving approx 300 feet. Lots of other ski cuts at this elevation and aspect produced no other slab results, otherwise minimal loose dry. Did note a wide crown estimated to be 1-2 feet deep on steep W facing convex roller just north off the Crown Point ridge, appeared to be natural release. North facing and non wind affected snow skied very well.

March 9, 2019, 1:30 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: We ascended Arrowhead Mountain safely along the east ridge in the trees. On the ridge at approximately 4800 feet, we observed wild slabs on the southern face of the ridge with shooting cracks on a steep exposed slope. No signs of recent slides.

Weather: Sunny

Snowpack: 1-2 feet of powdery snow with hard icy crust underneath

Avalanches: None

March 9, 2019, 1 p.m. PST

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

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

Area Description: N-nw at 7k on a steep convexity on white salmon glacier on mt shuksan

Weather: Partly sunny

Snowpack: Roughly 1ft of dry low cohesion snow on 4inch thick firm boot pen. crust. Weak snow below crust.

Avalanches: Triggered 6" slab within recent snow that propogated 50ft and ran about 50ft. Slope looked wind loaded at top and was steep and convex. Saw several other natural trigger slab avalanches below ridgelines that looked similar in size and elevation but a bout more N and NE aspects.

March 9, 2019, 1 p.m. PST

Region: Mt Hood
Observation by Josh Green

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

Area Description: Mount Hood - East

Route Description: Traveled up ridge between 3500 and 5500 feet. Ascended SE aspect wrapping around to North. Descended NE. Slope angles up to 45 degrees.

Weather: High overcast / partly cloudy. Calm wind.

Snowpack: Mostly stable - see images. No whumphing. Shooting cracks limited to less than 30cm from skis, mostly occurring when stepping above skintrack.

Avalanches: None observed.

March 9, 2019, 12:53 p.m. PST

Region: Mt Hood
Observation by Kyle Wyatt

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

Area Description: SSW aspect, near treeline, slope angle 30-35 degrees

Route Description: In our way back to the car we tested a few convex rollers on Clark canyon’s ridge and had a 8 in slab That propagated 8 feet, was not hard to trigger. So we opted for supported terrain in the trees to get Down to the cat track.

Weather: 17°F at 6 AM with temperatures rising to 28°F by noon. Early morning sun, Then overcast skies by 10 AM.

Snowpack: We dug a pit 50 cm down on a NW aspect to Perform some column tests. CT13 @30 cm (RP) & ECT22 @30cm (RP) this all failed on a crust with rounding facets underneath.

Avalanches: When ascending back to the cat track There was an opening in the tree run near the bottom of the run. When crossing the slope I triggered a R1 D1 slab. Surface snow was fairly dry and lose, Slab propagated 10 feet and ran like a big pile of sluf.

March 9, 2019, 12:30 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? Yes
Was anyone caught in an avalanche? No

Area Description: South face of Lichtenberg Mtn West

Route Description: Skinned up the main route on the south side, keeping left of the ravine and the upper slopes that run into the ravine. Ascended the saddle and then up the ridge to the west. Descended the open rocky slots from the central west top. Skied down and then to skiers left to avoid small rock bands below and allow the slough to run out.

Weather: Sunny and warming with storm clouds in the distance

Snowpack: Between 2 and 5” on top of crust. Good bonding layers below.

Avalanches: To be expected top layer sloughing. What was unexpected was its delay reaction slowly behind. Then would continue to run long, spread, and pick up more as it traveled. Easy to manage, as long as you knew to keep away from terrain traps and keep distance between group members with good communication. We verbally talked to skiers, from safe space, to describe location of slough relative to skier. This helped the skiers route while managing slough.

March 9, 2019, 11:30 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Adam U

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

Area Description: I saw many human-triggered avalanches in the backcountry on Mt. Shuksan (White Salmon Glacier and above Northwest Couloir), Shuksan Arm, and Mt. Ann.

Weather: Sunny w/ patchy clouds. Sun was strong!

Avalanches: All looked to be the latest foot or so of snow sliding on the firm layer of the first week of March.

March 9, 2019, 9:30 a.m. PST

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

Route Description: Swift Glacier

Weather: Clear and cold, light breeze. No snow transport but light previous drifting had occurred.

Snowpack: 20-40cm HST with deeper drifts since 3/6, cold and uncohesive except above about 6k where the slab underneath the low density surface snow was 4f+. Ski pen was 10-25cm, effortless trailbreaking and skiing. Setting the skinner up the Swift Glacier in the morning, felt a small collapse underfoot. Continuing on we had two collapses, each one larger with the last about 40ft section around us. We dug down to see what the failure layer was: At 7600ft on a Southeast aspect found 1.5-2mm facets over a thin sun crust buried around the 6th. Sudden Planer Compression Test failures with 3 and 4 (easy) on this layer down 40cm. We made a point to avoid steep pockets on similar slopes, and continued up. After we skiied down some nicely supported and lower angle slopes, we watched another party ski through one of the most suspect zones, with no results.

Avalanches: Some small wet loose on steep southeast aspects down at 5k.

March 9, 2019, 8 a.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? Yes
Was anyone caught in an avalanche? No

Area Description: Tumwater Canyon - Swift Creek

Route Description: North/Northeast couloir 1500' to 4500' to 50-degrees. Large unfrozen water zone crossed.

Weather: Sunny, cold (-5C), and clear, light east winds, no transport, no precip.

Snowpack: Persistent cool temps have reduced the strength of the overlying slab on sheltered aspects. Recently faceted surface snow was present from 1600' up. In some locations, the entire 'pack has faceted to the 8 FEB crust/facets (~100cm down), with very large facets (2-3mm) below the crust. Current snowpack structure is skiing nicely, but may not bond well should an actual storm arrive with some water. Forecasted lower elevation warming should favor wet loose in the roadside zones and eventually consolidate the pack.

Avalanches: Point releases on solar rocks were common on east and south. Sluffs were running 50-100 m on north when skied and further in gully features, D1.5-D2 depending on terrain. No slab avalanches, all wet/dry loose slides.

March 8, 2019, 5:50 p.m. PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by Shane Robinson

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

Area Description: Backcountry near Crystal Resort.

Route Description: We skied into Crystal Lake Basin via the King. Then skied the north facing bowl southeast of Crystal Peak. The. Skied the east facing slope south of 3-way, then skied Joes Badass Shoulder. Touched almost every aspect on the compass at most elevations.

Weather: Day started with only few clouds and strong solar input. By midday, it was thin overcast and S -1. By 4pm if was S5! Winds were mostly calm or light out of the west. Didn’t take temps but felt colder in the pm.

Snowpack: Did not dig, but 30-40 HST in most places until the end of the day when we found 50+ HST. HST is not well bonded to old snow surface but also very unconsolidated (dry loose - little to no slab). Made skinning difficult on steeper terrain.

Avalanches: No new avalanches observed.

March 8, 2019, 4:40 p.m. PST

Region: Snoqualmie Pass
Observation by Jeremy Allyn

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: Source Lake - Big Trees - Pineapple Pass - upper Denny Creek SW aspects - return same

Weather: Mainly cloudy, calm winds, good low-mid elevation vis into surrounding terrain, temps 18-34F

Snowpack: Spotty 3-4mm surface hoar up to treeline. 20-25cm of uncohesive recent storm snow sits on a variety of older surfaces ranging from wind affected layers (1F hard), to thin wind slab (1F-P hard, ~15cm thick), to well-settled storm snow, to a melt-freeze crust on solar aspects (2cm thick). Very little wind affect in most recent snow, but a high degree of variability in upper snowpack structure is still evident from recent winds. Snow profile in Great Scott Bowl, 4840ft, NE, HS 290cm, 2/3 MFcr down 145cm. Recent storm snow vary well bonded to the old/new interface. Mainly hard, resistant planar, results in small column tests on various older interfaces in the upper meter, most notable down 65cm on a slight density break (no facets or SH observed here). Denny Crk, SW, 4400-5200ft, 20-25cm of recent snow unreactive to ski tests (not enough slab structure or depth) but failed easily, sudden planar, in shovel tilt tests on preserved large stellars crystals.

Avalanches: A few very small Loose Dry in steep terrain along Alpental road, otherwise, no notable new avalanches.

March 8, 2019, 2 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Gregg Oliveri

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

Area Description: Artist Point. Guido's Trees area. Crust layer made travel difficult on any angle over 30 degrees. New snow poorly bonded to crust.

Route Description: Toured up solo from parking lot to Artist Point area to check snowpack

Weather: Snowing throughout the day

Snowpack: 8" over night. 5" through the day

Avalanches: Remotely triggered several pockets of wind slab at the 5,000 ft. level on southern aspects. Wind slabs are touchy and easy to trigger.

March 8, 2019, 1 p.m. PST

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

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

Area Description: Hidden Bowl - Shuksan Arm

Route Description: We skied on a ridge to the east of an area called the Hour Glass on the Shuksan Arm. The sun affected slopes were easily rigged with ski cuts. They were propigating quite large and running a long way. Definitely life threatening slides. Many other slides also occurred on the arm but I thought people would like to see these. Stay safe this weekend and avoid rapidly warming slopes!

Weather: Fair

Snowpack: 14”+ new on wind slabs and facets from two weeks of high pressure. A variety of densities exist within the new storm snow. Mid storm warming created a slab above light snow on top of facets.

Avalanches: Two slides both skier triggered with ski cuts. First slide was top skiers left side of Hidden Bowl. 6”-12” depth, 200 ft wide and ran for 1000 ft. Second slide was lower on skier left side of Hidden Bowl. 12”- 18”, propagated 200 ft and ran for 500 ft