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Observations

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.

May 10, 2019, 5 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Robert Hahn

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

Area Description: Hidden Lakes Peaks area.

Route Description: We departed the trailhead at 04:45, hit snow at 4200 ft, and skied NE off the Hidden Lakes Peak Ridgeline by 08:30. We returned to the ridgline and skied NW by 11 AM.

Weather: Sunny and clear. Warm air mixing with cool surface outflow before sunrise. Becoming very warm after sunrise. Very light winds.

Snowpack: We found no refreeze below 5500 ft (pole penetration up to 1 ft at 5:30 AM), very minimal refreeze 5500-6000 ft, and weakly supportable refreeze above which broke down rapidly with direct sunlight and very warm daytime temperatures.

Avalanches: We observed 3 or 4 small to large wet slab avalanches and some small loose wet activity that released naturally within the last week on NE, E and SE aspects in the 5800-6400 ft elevation range (photo to illustrate activity on an E aspect). We were also able to trigger several small loose wet avalanches within the surface snow on N and E aspects and would have expected deeper entrainment later in the day.

May 7, 2019, 6 p.m. PST

Region: East Slopes Central - Lake Chelan to South of I-90
Observation by Jerome Drescher

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

Area Description: Longs pass descending towards Stuart

Snowpack: Spring snowpack - hard crust, corn, isothermal depending on aspect, angle, and elevation

Avalanches: Saw a large wet slab that released from the east face of Long's Pass on a steep slope towards the south of the pass. This avalanche occured during the day as it was not there when we descended in the morning.

May 6, 2019, 2:25 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River

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

Area Description: Exposed convex slope just south of Point 5930.

Route Description: Approach was along the summer trail towards Hannegan Pass. Trail was 50% snow-covered. Descended to Hannegan camp and proceeded to ascend towards Ruth to traverse under ridge south of Point 5930. Traverse is exposed. Descent off of Ruth at ~13:30. We traversed again on exposed slope back towards Hannegan Camp, and triggered 6 wet loose slides.

Weather: Clear skies until noon. Temperature rose to around 50 degrees. High stratus clouds came in with low cumulus clouds to the west, came in around noon. 10 mph wind gusts around then. Otherwise, the rest of the day had a light breeze (5 mph). Intermittent sun through clouds past noon. Temperature rose slightly higher than 50, noticeably warming up the snowpack.

Snowpack: Hard, firm snow (not icy) along trail. Snow that was exposed to sun was sugary. Snow was firm on ascent until noon. Snow began to soften up around noon, and became heavy and wet.

Avalanches: 6 wet loose slides triggered by skier traversing along exposed convex slope just south of Point 5930. Aspect of slope: SW. Crowns were each about 2 feet wide. 1 point release (natural) above us during this time, triggering wet loose slide down the same slope.

May 5, 2019, 1:50 p.m. PST

Region: West Slopes North - Canadian Border to Skagit River
Observation by Lowell Skoog

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

Area Description: Hidden Lake Peak, east flank, about 6300ft

Route Description: Approached from Sibley Creek road

Weather: Sunny and warm, light wind

Snowpack: Warming spring snowpack

Avalanches: Size 1.5 wet slab (two slabs actually) apparently triggered remotely. Slabs pulled out in a steep concavity while our party was skiing a more gentle convex shoulder about 100 yards to the north. Crown appeared to be between 30 and 60cm. Remarkable that we could have triggered something remotely from that distance. But if it wasn't a remote trigger it was the one of the most remarkable coincidences I can recall.