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Observation: Turnagain
Location: Seattle Ridge
Rode up the Seattle uptrack and into Main Bowl. 1″ breakable crust on E and S solar aspects. Softer wind affected snow, anti-tracks, wind slab, and sastrugi near top of Repeat Offender, along ridgeline, and in Main Bowl.
Observer Comments
Weather
Clear skies at 1400, progressing to few clouds by 1500 and overcast with some mountains obscured by 1600. Light winds noted at 1600. No precipitation. Upper 20s F at ridgetops, above freezing at moto lot. Temperatures cooled down a bit when the clouds rolled in.
Snow surface
A 1" breakable melt freeze crust can be found on solar aspects. The crust melted a lot in the sunshine below 2000' but was still a thin crust by afternoon. Soft wind affected snow, wind slab, anti-tracks, and sastrugi could be found anywhere without a sun crust.
Snowpack
Pit 1: Main Bowl, 1990', NE, HS=185 cm. TD = 120 cm. HS > 300 cm in this wind loaded area. We dug in a thinner spot in a wind loaded area. CT21 SC down 105 cm on facets between melt freeze crusts. The facets sat on a stout melt freeze crust. ECTX.
Pit 2: Repeat Offender, 2684', E, HS=165 cm. TD=115 cm. CT20 SP down 100 cm on 1-2 mm dry facets between melt freeze crusts. CTN. ECTX.
Anti-tracks in Main Bowl
Sastrugi, wind slab, and anti-tracks on the ridge above Main Bowl
Crusty conditions on the flats. Melt freeze crusts ~1" thick warmed and softened in the sunshine by afternoon, but the crust did not disappear by the end of our ride.
1" breakable melt freeze crust on Repeat Offender at 2684'. This crust was present on S and E aspects at all elevations, and more pronounced at lower elevations.
Wind affected surfaces looking down into Main Bowl
Seattle Ridge uptrack