Avalanches: WL-N-D2.5 (from March 18th?) on a steep, cliff-laden SE aspect ~12000′, debris confined by gully, ran ~2,500′, gouged out old snow and produced some small crowns on the sides of the gully. I don’t think this was triggered by cornice fall and although I could not make out a crown from my vantage points, this may have been a wet slab rather than wet loose avalanche.
Weather: Hot and sunny with light westerly winds
Snowpack: The transition to a spring snowpack is well on it’s way, but not yet very dependable. The window of good corn skiing was pretty short-lived on sun-exposed slopes before the crust softened and ski penetration got deep today. Water was running over ice bulges on steep east-facing slopes between 11,500′ and 12,000′ @9:30am. I also noticed a significant crack on a high-elevation SSW-facing slope. I agree that the wet slab concern is growing.

Meanwhile, it’s still dry and “chalky” on high-elevation (>12,000′), shaded northerly slopes.
Stiff, supportable crust lasted until at least 10:30 am on the valley floor of Washington Gulch, but snow in the dense forest barely refroze overnight (moist snow surface at 7:30am @ 10,000′). Stay away clouds!

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Avalanches: Its finally happened! The Purple Palace Guide Cracks released in some form of wet slab/guide crack collaboration, today.
Weather: Blue bird with a few puffy or high then clouds. Light winds at ridgeline. 2017 Hot. Another bug landed on my goggles at 11,000ft.
Snowpack: Northerly slopes above treeline had a snow surface mix of soft and faceted, to various forms of wind-board or wind sculpted. The combination of these firmer surfaces and the march sun not being high enough yet, are combining to keep the snow surface cool. Tilting more East, from north, the forecasted wet snow travel advice can be followed.

At ridlegline, south slopes where generally firm and supportive before noon. The exception was abnormal shallow slopes that were 50/50 supportive into moist/wet snow below. The next time we were on south slopes proper was around 10,500ft at 2pm and they were generally unsupportive to boots but still supportive to snowmobiles and skis.

Guide Crack release. East Aspect, 10,500ft

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Avalanches: Skied on a few steep southerly aspects mid-afternoon trying to produce signs of instability but got none.
Weather: Hotter than a 2-peckered goat.
Snowpack: Shallow and melting snowpack, generally less than 60 cm below treeline, saw a decent refreeze overnight. Prime corn window on SW’erly aspects was noon, and slopes became unsupportive by 2 p.m. Several hand pits to the ground on S and SW aspects BTL suggest that wet slab concerns are over; the snowpack is homogeneous large weak very wet grains, with drainage well established. It felt like you might be able to trigger a small wet loose in very steep terrain still.
One pit on a NW aspect BTL had moist snow throughout except very wet grains in the top 10 cm, fairly homogeneous snowpack but slightly softer and wetter near the ground.  There were percolation columns piping freewater straight to the ground. There did not appear to be any concerning interfaces/layers for water to pool on in this location, but if there were, free water would have been hitting them.

WNW aspect BTL.  Note the percolation column extending from very wet surface snow strait to the ground.  No problematic interfaces observed throughout the moist snowpack.

Avalanches: cornice dribble on E slope triggered an impressively wide D2 LW ~40* across from river bend
Weather: Clear sky, light winds at ridgeline @ 12:00 increasing to moderate in the valley floor by 13:00
T: Lo -6C @ TH @ 7:30
0C @ 10,000 @ 11:00
~9:30 On 1st lap noticeably colder as we descended to valley floor
Snowpack: 4-6” re-freeze at all elevations on open slopes.
less so to no refreeze in the dense high N facing pines
appears despite the inversion that radiative & convective cooling did the job on open slopes & the re-freeze was consistent with the previous 2 days in the same zone

Avalanches: Evidence of wet loose activity from the past few days on low elevation northerly aspects, in addition to previously observed wet loose on sunnier aspects.
Weather: Few thin clouds. Hot temps; high of 50F at 10,200 ft. Light winds.
Snowpack: Handpit at 10:30 a.m. on an E aspect NTL had very wet grains in to top 20 cm, and moist snow below that There was an ice lens about 30 cm deep from previous pooling water that had refrozen overnight. Dense, wind affected snow at higher elevations appeared to be handling the warm-up better; remained supportive through mid-day except near rock bands, where skis were punching through. Lower elevation trees were unsupportive in the afternoon.

Avalanches: See photo. Ran between 10:30 and 12:30 today. Point release looks to have been just below the cornice at the top of Gibson Ridge. E aspect at the S end of Gibson Ridge.
Weather: Bluebird
Snowpack:

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