| Trigger | Natural | Remote Trigger | Unknown |
| Avalanche Type | Unknown | Aspect | Southwest |
| Elevation | 3500ft | Slope Angle | unknown |
| Crown Depth | 12in | Width | 100ft |
| Vertical Run | unknown |
Avalanche: Turnagain
Location: Magnum
Toured up to the NW shoulder of Cornbiscuit and dug a pit, then across the creek and up to PMS bowl on Magnum. We should have stayed on a northern aspect, because there was a crust on all the S and W facing terrain and it was too cold, windy, and cloudy for the sun to soften the crust. In one pit we had easy failure and full propagation on the new snow layer about 1′ deep, so we decided to stick to mellower terrain.
Avalanche Details
We saw one or two slab avalanches that released on steep SW facing terrain far back along the Magnum ridge. They looked like they were triggered by a small piece of cornice or a loose snow avalanche falling from above
Weather
Partly sunny with light winds and cool temps in the high teens or 20s F.
Snow surface
A dusting of new dry snow on top of a crust, about 1-2" thick. Below that there was just a few inches of soft snow at the road level and closer to a foot of new snow under the crust by 2000'.
Snowpack
We dug two snowpits, one at 2000' on a N aspect and one at 3100' on a SW aspect. There were no notable results from the upper pit. However, in the lower pit we had full propagation about 1' deep at the interface of the new snow and the old snow surface, which is an icy crust about 2" thick. Based on the hardness of the new snow it seems like it started off low density and then became more dense later in the storm, which formed an upside down layer on the surface. This is a concerning test result and we decided to stick to low angle terrain after seeing this.
Looking up into super bowl, with some loose snow avalanches on the N aspect or Cornibiscuit
Nice light showing the terrain in PMS bowl.
Full propagation in an ECT on tap number 11, showing the new snow is unstable.
The north aspects above treeline were definitely holding better snow today
Massive cornice still lurking above PMS bowl on Magnum
Wet loose avalanches at around 1000' on SE aspect of Seattle Ridge near the weather Station.
Storm snow avalanche on SW aspect of Magnum that looks like it was triggered by a loose snow avalanche from above.