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Observations

Nov. 2, 2019, 2 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Sarah Miles

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

Area Description: North face of Crag View at the Squak Glacier on South Baker.

Route Description: Approach from Park Butte Trailhead

Weather: Sunny, clear, calm.

Snowpack: Low, not measured.

Avalanches: Photo of at least a few days old advance, not observed real time.

Oct. 23, 2019, 11:30 a.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: Heliotrope ridge

Route Description: Heliotrope ridge trail, Thunder knob, Gargoyle camp

Weather: Clear, warm

Snowpack: HS 105cm @ 7k ft just below Gargoyle camp Surface: MF with large rain runnels up to 9000 ft (viewed)

Avalanches: No

Oct. 19, 2019, 3:50 p.m. PST

Region: Snoqualmie Pass
Observation by James Richardson

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

Area Description: The PCT leading up to Kendall Peak around ~5100 ft which is an open area of terrain.

Weather: Heavy snow with mixed graupel, gusting winds from the W, thunder, lightning. Weather data from 'Snoqualmie Pass - Dodge Ridge' (Alpental wind data not available) shows wind gust @ 18mph W/WSW around time of observation.

Snowpack: Loose unconsolidated that did not cover the vegetation/rocks until ~5100ft where the snow became noticeably deeper ~25"directly on bed surface.

Avalanches: Witnessed loose dry snow slides originating above the PCT at around ~5600 which fanned out and resulted ~7-9ft of debris covering the trail which serves as a terrain bench. Party was able to quickly exit to a sheltered area of trees prior to impact. My assessment is (as predicted in the NWAC Special Statement), there was a wind loaded pocket in the SW facing feature of Kendall Peak as sustained westerly winds combined with strong gusts from the NW were depositing snow on the western ridge leading up to Kendall Peak. Slide seemed to be triggered by a particular strong gust of wind around 15:50.

Oct. 12, 2019, 12:07 p.m. PST

Region: West Slopes South - South of I-90 to Columbia River
Observation by Samual Farnham

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

Area Description: Observed from downhill side of Anvil Rock in Muir snowfield, Approximately 9400'

Route Description: Muir Snowfield ski tour

Weather: Heavy overcast, increasing white out conditions, light precipitation in the form of snow, wind ~ 15mph

Snowpack: Firm light snow pack

Avalanches: Witnessed Avalanche coming down from Upper Nisqually glacier to climbers left, of muir snowfield. Unsure of point of release, most likely triggered from ice fall in upper glacier.

May 27, 2019, 9:30 a.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: East facing slope approximately 8000’ elevation.

Route Description: Witnessed multiple wet loose slides while climbing Silverstar mountain via Burgundy Col. and Silver Star Glacier.

Weather: Sunny

Snowpack: Wet and slushy, lots of post holing, weak snow pack

Avalanches: Multiple wet loose slides on snowfield between Burgundy Col. and Silverstar Glacier.

May 26, 2019, 10:30 a.m. PST

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

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

Area Description: Roman Wall of Mt. Baker - Deming side @ ~10,500'.

Route Description: Solo climber working way up the Coleman-Deming route alone nearing the top of the Roman Wall on the Deming side.

Weather: Mostly Cloudy w/ moderate winds from the N/NE drifting snow on S/SW Aspects.

Snowpack: Above 8,000', 3-6" of fresh snow was deposited on top of a thin, breakable refrozen crust. Beneath the crust, 10" of isothermic vomit, still wet from the warmth and rain of previous days. Wind had stripped snow completely on windward aspects to the crust and drifted it on lee aspects in slabs up to 2' in thickness.

Avalanches: Large SS avalanche estimated at D2 triggered by solo climber at top of Roman Wall. Carried solo climber ~500' and also entrained two others in the debris -- carrying them about 100' downhill. Debris continued another 3-400' downhill after the climbers came to a stop -- jumping a few crevasses before stopping on the upper Deming. No injuries reported except for minor chest pain from the party of two who were hit by the debris. Crown estimated ~2' in thickness.

May 26, 2019, 8 a.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? Yes

Area Description: Mt Baker, Roman wall/Deming glacier, likely appx 9,500-10,000. SW aspect

Route Description: Climbing route, climbers ascending Coleman Deming route.

Weather: ~30 degrees F at 9,000 ft level, 7am. Transition from storm period to good weather, moderate to strong wind ENE. Estimated appx 30mph sustained at 9000 ft. Upper 500+ feet of mountain obscured by lenticular cloud.

Snowpack: Consolidated with ~1-1.5ft new storm snow. No apparent weak interface. 1-2in windslab/crust at 9000 ft level on N/NW aspect.

Avalanches: Verbal report from party involved, crossed paths on trail. Party of two traveling on foot triggered and carried by windslab on Roman wall section of Mt Baker. Sounded like a possible third person was carried, but I couldn't say for sure. Reported that no one was injured or buried. Was not able to get exact details as the climber appeared shaken and unwilling or unable to report elevation, aspect, crown depth, length of runout, exact time.

May 25, 2019, 2 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Brook Peterson

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

Area Description: Reynolds Peak, south aspect

Route Description: Stephenson / Bongi scramble route, attempted from the South / SW side

Weather: rain below 7000', snow above 7000'

Snowpack: Felt consolidated and 'summer-ish' down low, with sun cups, made for easy travel. But was quite deep and felt much less considated above ~7500. No runnels, sun-cups, and above 7500 boot steps sank knee-high, except a few places where we sank thigh-high. Additionally, 3+ inches of new snow fell while we were out at elevation, we bailed on our summit attempt rather than crossing an open bowl at 8000 where the snow felt very heavy, deep.

Avalanches: On the way down above 7500, we kicked off a couple loose-wet avalanches, mostly small and surface-only, the top 4-6 inches sliding. But we also heard much larger something on the way down, sounded like rock+snow.

May 12, 2019, 3:33 p.m. PST

Region: East Slopes North - Canadian Border to Lake Chelan
Observation by Huggin , Munnin , SKIER-X , and Peter Larsen

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

Area Description: Blue Pk. N.C.Hwy. 20.

Route Description: N.aspect 100' below cornice .

Weather: Sunny ,60deg. no wind.

Snowpack: 2-4" soft corn over supportable snowpack.

Avalanches: 1/2 way from cornice down to Spire Gulch col. 30' wide start to 75' wide 100' below ,running 100' and settling @ swail , tarn above Spire Gulch . This avy. ran TO THE GROUND ! A natural release . 1st. one observed to the ground in this area. Many other natural releases from sun exposed and hanging snow on steep rock faces etc.

May 11, 2019, 11 a.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Tom Perkow

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

Area Description: Mt. Baker - Lincoln Peak (Black Buttes) Mt. Baker - Boulder Glacier

Route Description: Easton Glacier

Weather: Sunny and warm

Snowpack: Variable

Avalanches: Almost continuous slides coming off of Lincoln Peak (Black Buttes) from about 10:30am to 11:30am on steep east-facing slope in full sun. Huge slide had come off of the crater rim and down the entire length of the Boulder Glacier and beyond fairly recently. See photo - zoom in. This was a debris avalanche.