Quick report
The "Beaver Moon" storm event brought a welcomed higher snow total to Hatcher Pass than originally forecasted. Independence Mine showed up to .4" of Snow Water Equivalent or 5-8" of new storm snow for mid-upper elevations. Today's calm, clear and cold conditions provided excellent visibility and good touring. We were looking to get eyes on the recently observed avalanche activity as well as poke around in some areas that have yet to see much travel this season. Overall the riding conditions are improving as the snowpack is growing.
See 11/17 observations from WSW Marmot for the most recent recorded avalanche in the Pass.Weather
- Air Temp
- 10
- Cloud Cover
- clear
- Wind Loading
- none
- Rain Elevation
- Basal rain crust observed up to 4000'
- Recent Snowfall
- 5-8"
- Snow Avail For Transport
- moderate amounts
With the taper of the weekend storm cycle, we observed calm, cold and clear conditions. Average of 5-8'' of new snow with limited wind affect observed throughout our tour. Temps stayed right around 10° for the duration of our tour and winds remained light (despite the NWS Alert yesterday).
Snowpack
We dug a full pit near the summit on the NE aspect of Peak 4068 where we found about 5'' of new snow that was sitting on a thin crust that was likely formed with some pre-frontal fog to start the recent storm. This layering is likely isolated and anomalous and will probably decompose in the coming days. Below this we found a thicker wind slab remnant from the November 5th wind event sitting on our early season basal ice.
The current main concern with our snowpack structure is dry new storm snow as well as faceted old snow over crusts. Some of these crusts are old, decomposing windslabs and in some areas (see pit profile) look more like a cohesive ice layer. At the bottom of the snowpack, we have seen widespread rain crusts that are up to 10cm in thickness. In areas where rain crusts remain uniform and cohesive, it is possible to see dry loose avalanches run larger (see public observations from Marmot).
Avalanche
- Size
- D1.5
- Count
- 2
- Aspect
- SW
- Elevation
- 3500 ft
Crown was just below the marmot ridge line on the NW aspect and it ran ~1000ft. We did not see the slide happen but ran into a party of two that were below on the skin track during the slide. They were ok and said the slide stopped before it reached them. They also did a beacon search and found no signal. Cause for the slide is unknown. We dug a pit on a similar aspect in a safe zone and found a weak bond between layered wind slabs @45cm deep that failed at ECT12.
