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Observations

April 17, 2018, 2:20 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Jere Burrell

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

Area Description: Artist Point, Table Mountain, Blueberry Cronice and Dog Chute

Route Description: Artist Point, Table Mountain, Blueberry Cronice and Dog Chute

Weather: Overcast skies breaking through out the day along with diminishing precip rates.

Snowpack: Strong solar on steep southerly aspects caused loose wet activity in the upper 20cm. Cornices are very large and abundant growing in some uncommon locations. Many glide cracks on all aspects and observable elevations have been bridged and may be difficult to see while descending from above.

Avalanches: A large D3 avalanche recently released, within the previous 36 hrs, adjacent to the Artist Point parking lot, below the Blueberry Cornice and within Dog Chute. Cornice triggered slab with a crown 5’+ deep running to the valley.

April 15, 2018, 1 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: Timberline area/Salmon River Canyon, SW, 6000', 25 ?

Weather: X, 1.5 C, SN S1, L NE, PF 23

Snowpack: HS 270 cm, HN 5 cm, HST 42 STE, 13 cm down, P (Q2) * STE, 31 cm down, 1F (Q2) * CT 23, Q2RP, 39 cm down, TD 42 * 42 cm of snow from the recent storms sitting atop old snow. 0 C top to bottom. Aside from the CT/ST results, there were several layers between 0 cm and 42 cm down, 1-2mm E, P to 4F, never more than one hardness step between them, that I couldn't get reasonable grain ID on. * ID was difficult but looked somewhat like FCxr but was probably just RR

Avalanches: N/A

April 15, 2018, noon PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Stephen Ettinger

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

Area Description: Skiing in two separate parties near Cutthroat Creak.

Route Description: One group skied up the cutthroat drainage, towards the lake, but decided to turn around because of overhead exposure in basin, other group toured up Shangri La.

Weather: Partly cloudy until 11am, then becoming overcast with snow (s-1) above 5000ft.

Snowpack: Approx 250cm depth at 5700ft on S-SE exposure. Below 5000ft, the upper 100cms was isothermic, above 5000ft, we started to find a buried MF crust 5cm's thick (p hardness) @ 20cms down. Crust was flanked both above and below by 2 cms of loose, rounded melt/freeze forms (~3mm). Planar on handshear @ 15 cm. Ski penetration 5cms. Lots of localized collapses/whumphing up to 3m in diameter on micro-terrain features in these upper layers. Very eerie upper snowpack

Avalanches: Second group reported seeing a large, d2.5-d3 size avalanche on a N-NE aspect above 6000ft in the Cutthroat drainage. approx 1m deep, 100m wide, that ran 150-200m.

April 15, 2018, 10 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Jason Speer

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

Avalanches: There was a large wetslab in Bagley Bowl on the north face of Table Mountain. The low cloud cover made good observations difficult but I estimate the crown to be up to 10ft/3m tall and 200m wide. See attached picture. WS-N-R2D2+-O

April 14, 2018, 1 p.m. 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: Heather Meadows/Bagley Lakes/Austin Pass area.

Snowpack: Hand shears around 4300’ gave planar results on the 4/11 crust, approximately 2’ down. Test profile at 4780’ on a NE facing slope above Austin Pass: CT 22 RP down 19cm, in recent storm layers. Observed a crust at 102-110cm, fragmented and decomposing particles above the crust all the way to surface (4F/1F hardness); melt forms/rounds below the crust to bottom of profile at 140cm.

Avalanches: Saw a large (R3, D3) slab avalanche on the N/NW facing slopes below table mountain (see photo). Crown appeared to be 2-4 feet; possibly deeper in places, it was hard to determine crown height due to poor visibility. The avalanche looked relatively recent (the crown was not particularly buried by the new snow) but at least one wet loose avalanche had run over the avalanche prior to Saturday morning. Also observed numerous D1-D2 wet loose avalanches from prior days. Did not observe any new avalanches today (Saturday 4/14/18).

April 13, 2018, 1:15 p.m. PST

Region: Stevens Pass
Observation by Chris Riedinger

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

Area Description: Skyline Ridge, E & W aspects

Route Description: Toured road to cell tower followed ridge for s bit and first skied short shot on west aspect, toured up and over to east aspect, anything southerly was getting strong radiation & some warming

Weather: S-1 to S1 1000a-1400p obscured

Snowpack: Approx 15-20cm new upside down

Avalanches: Small wet loose point releases started on steeper terrain and kept momentum onto lower angle terrain.

April 13, 2018, 12:30 p.m. PST

Region: Mt Hood
Observation by Heiko Stopsack

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

Area Description: Mt. Hood Vista Ridge

Route Description: Ridgeline above White River Canyon.

Weather: 15 to 20. Gusts 35-40.

Snowpack: 1 meter hasty'ish pit at 6500K S-SE aspect 0-55 cm Fist PP @ 25cm CT10 Q1 55-75 4F PP-DF @55cm CT 12 Q2 75-80 P MF or RC ? 80-90 Fist CL 90-100 1F @90cm CT17 Q2

Avalanches: None

April 12, 2018, 4 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? No
Was anyone caught in an avalanche? No

Area Description: Blewett Pass- East Face area

Route Description: Toured up via Tronsen meadows and wrapped around to the east face of diamond head. Coverage was spotty down low. That being said, I was still able to skin most of the way in and ride most of the way out.

Weather: Clear with increasing clouds throughout the day. Calm wind. Temperature around 40 degrees.

Snowpack: The snowpack seemed to be in a good melt/freeze cycle. I dug adjacent to one of the slopes and found the height of snow being approximately 112 cm (to the ground). I observed one layer 30 cm down that appeared to be rounded. I didn't have any results on this layer in test.

April 12, 2018, 12:30 p.m. PST

Region: Snoqualmie Pass
Observation by Kameron Harris

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

Area Description: Slot Couloir

Route Description: Climbed phantom, skied slot, exited via thunder divide to snow lake.

Weather: Sun breaks becomin overcast with light to moderate snow. Temps close to freezing

Snowpack: Evidence of spotty windslab in upper phantom becoming more widespread near top. About 4-6" of new snow on wet older snow at all elevations. New snow was well bonded to the crust near and below tree line but becoming wet at all elevations by afternoon.

Avalanches: First skier entered slot couloir on belay and triggered 4-10" deep windslab which propagated quickly to the full width of the couloir and ran its full length. R3-D2. Evidence of widespread wet slab rain on snow cycle recently. Skiing out to Source lake, we triggered a size 1 wet slide which ran 200'.

April 10, 2018, 7 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: Granite Mountain

Route Description: Hiking trail to first avalanche chute, ~3300ft, then up the outskirts of the chute and onto the SW shoulder.

Weather: Precip window of about 4 hours. Mostly cloudy with breaks of sun. Occasional snow and rain depending on elevation.

Snowpack: Unconsolidated wet below 4000 feet. More stable at 4000. Very stable and supportably fun skiing above 4500.

Avalanches: None observed. We kept our approach and descent conservative and stayed out of the big terrain choosing trees and ridge lines for route preference. Snow below 4000 feet wants to wet slide but I'm not calling it out above. It is very manageable and and predictable. Just pay attention. You could easily move the top 6-8 inches of wet unconsolidated snow with each turn. Pay attention to terrain choices and don't ski on top of your partners.

April 9, 2018, 1 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Drewsky P

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

Area Description: Above Entiat river valley

Route Description: Traveled up forest service/logging road to unnamed 7100ft peak and skied NE, E, SE and S aspects.

Weather: Partly cloudy and very warm with occasional full sun breaks: high of 45F at 5000ft.

Snowpack: S, SE and E aspects held well consolidated spring snow, quickly thinning at lower elevations. NE aspect snowpack is still layered/cold beneath top wet 40cm. At 6800ft: HS: 330cm. Two rain crusts exist in upper 40cm. Well-preserved layer of 4-6mm surface hoar at ~60cm yielded ECTP15 and PST30/END with very clean Q1 shears. Deteriorating 2/8 crust appears to be down ~100cm in this location amongst rounding facets.

Avalanches: Debris from numerous small to medium (D1.5) wet loose and cornice falls visible on steep sun-exposed slopes.

April 9, 2018, 9:45 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: Barlow Pass, south of Mt Hood

Route Description: Brief tour to check out the mid-April snowpack at low elevation after the past weekend’s storm. Skinned to a glade at 3850’ from Barlow Pass SP.

Weather: 2 C, FEW, C wind, NO precip

Snowpack: 12 cm new snow (fist) on 60 cm of old stuff (several layers from 4F to P, never more than 1 hardness step between them). Isothermal; -0.1 from top to bottom. HST 72 cm. Boot pen 30 cm, ski pen 20 cm. Thin breakable crust atop dense snow made for challenging travel conditions early (08:45, 1.5 C), but the crust was softening up and becoming sporadic by the time that I left (10:30, 3 C) as the sun beat down.

Avalanches: N/A

April 9, 2018, 9 a.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: Highway 2 corridor

Avalanches: Numerous large wet loose and wet slab avalanches over the weekend off Lichtenberg's South side (D2's) and Nason Ridge west of Rock Mountain (known as the West Camp Paths (D3's)). Many of the West Camp Paths went full track (which is +3,000 vertical feet) and stopped in the middle of the runout zones. Crowns of the wet slabs appear roughly 2ft deep. Photo 1: Wet Slab off Lichtenberg. Southeast at ~5200ft. Photo 2: One of the starting zones in West Camp. Southeast at ~5600ft.

April 8, 2018, 1 p.m. PST

Region: Mt Hood
Observation by Patrick Fink

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

Area Description: Bennet Pass

Route Description: Mature timber at 4600', and clear cut down to 3500'

Weather: Light precipitation with moderate winds out of the southwest with occasional stronger gusts. Little accumulation during 3 hr tour.

Snowpack: 9-18" of dense storm snow, wet at its base above the old snow. Right-side-up storm snow structure. Greatest moisture at new-old interface. Small sluffs possible on steep (>40) degree rolls sliding on new/old interface. No cracking, collapsing, or other evidence of instability. Wind-transport was not a factor during this tour, as both the weight of the new snow and the terrain seemed to limit transport only to the edges of road cuts. Riding quality was marginal, and best in areas of shallower snow. Observed danger was considerable on account of new load and should fall quickly to moderate with one cool night.