Crazy swings in temperature last few days. 13 below to 40 above in a couple of days with a rain snow mix yesterday in town. Switched to snow to the valley floor sometime last night and woke to two inches on my deck, with warm temperatures again.
Went with my buddy Paulie out to Tele Line where we had skied the last storms’ snow on supportable crust, bypassing anything steep(30+ degrees)and north facing again. The constant weather factor for the last few days has been the jet stream wind, up again and howling on the ridges out of the northwest. Same deal today as the next front intensified around 12:30 and started dumping a heavy wet, Pac-Northwest style snow. Nice storm skin as the only two other travelers were ahead of us and disappeared into the white out above the poma.
Hitting the point, the winds were calm again as on Wednesday, and the east-facing run was slathered in twenty cms of dense new snow up top. Did a quick hasty pit, similar shallow pack as Wednesday with the new snow supported by the crust underneath. I went first, skiied through the initial rock pillows and ditched it the trees early and waited for Paulie. No activity. Paulie dropped and met me in a cluster of dense old growth. The upper section skied well and the dense snow was nice supportive powder turns of the year. Bliss.
As we entered the middle section, things changed dramatically. We leapfrogged down to the traverse out, staying next to the ridgeline. Paulie let me know he was triggering whoomphing and propagating cracks in areas that I had skied. The thirty pound differential between us was enough to make the difference and allow him to punch through the saturated crust and trigger failure. We regrouped and went farther into the old stands. Entering lower elevations and into the rain/snow mix layer from the night before, the dense new snow wasn’t adhering to the increasingly saturated melt freeze crust. Bottom line the lower we got, the higher the avalanche danger became. We were able to traverse out in cracking boot top dense snow to the aspens, but this area will be very suspect if we get the snow predicted on Saturday and the pack on the Benchie traverse out becomes deep enough to slide. The aspens down low were extremely sensitive, and shooting cracks and small slab collapses were all over, even worse than the cracking on Wednesday. Again Paulie, being a beast, was triggering areas I didn’t all the way to the bus.
Snow Pack Discussion.
After Paulie triggered the whoomphing and cracking in the middle elevations of Tele Line, we staged at some trees and I crept out and dug a hasty pit. (Yep it’s a bona fide real pit with no saw, it actually has a place in the world of snow science.) On the go assessment. A lot going on in the 60cm snowpack. Bottom 20 cms, 3 mm loose facets. Next, a five mm melt-freeze crust, pencil hard. Following this, fifteen cms of smaller loose facets, 2 mm. On top of this, another four to five mm melt-freeze crust again, finger hard, increasingly saturated as elevations lowered. Topping the cake was the 20-25 dense wet snow in the spot I was at, a sheltered spot, east facing around the middle of the line. (the depth of new snow varied drastically in different aspects and elevations. We were on a eastern aspect, with a good view of north east.) All propagating fractures were easily Q1 shears, but didn’t run any distance.
Paulie was collapsing the crust from mid elevations down and the storm snow was running on the collapsed crust on loose facets below. Danger was even higher today than it has been in the last few days, especially in lower elevations N-E aspects. Didn’t get to test any W aspects at any elevation recently, but I assume similar types of results. We saw evidence of slab releases in NE aspects at 9500 ft and below. Temps have cooled off since the storm moved through and have skies cleared. Hopefully this will lock up some of the moisture and settle things, but this is just spray(a new phrase I learned today).
Concerned about Saturday, weekend crowds and the lure of pow will have intrepid souls venturing back there in very high danger. Hope all goes well, please let us know if you are out and see anything. Be safe. EVI