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Observation Date
2/4/2019
Observer Name
jg
Region
Uintas » Hoyt Peak
Location Name or Route
Western Uintas - Hoyt area
Weather
Sky
Overcast
Precipitation
Light Snowfall
Wind Direction
South
Wind Speed
Moderate
Weather Comments
Calm winds in the canyon bottoms but as soon as we gained a little elevation the wind was in full affect, even in lower elevation protected terrain. On and off light snow with an inch or so of accumulation. Ambient temps were mild in the mid to upper twenties at 9K but felt much colder in the wind. Windy Peak wind speeds were steady 30 to 40 mile an hour southerlies with gusts in the 50's and 60's.
Snow Characteristics
New Snow Depth
18"
New Snow Density
Medium
Snow Surface Conditions
Powder
Damp
Snow Characteristics Comments
Surfy, dense new storm snow. The upper one to two inches was relatively light. Damp snow surface to about 8K and damp snow under the new snow to about 8K as well.
Red Flags
Red Flags
Heavy Snowfall
Wind Loading
Cracking
Collapsing
Poor Snowpack Structure
Red Flags Comments
Only had one good audible collapse and cracking was fairly minor. The amount of new snow and water weight as well as the wind were the biggest red flags.
Avalanche Problem #1
Problem
New Snow
Trend
Increasing Danger
Problem #1 Comments
I'm not sure whether to call this new snow or persistent weak layer. The new snow/old snow interface is going to be our new problematic persistent weak layer. The old faceted snow surface this storm fell on is weak and produced clean shear with easy to medium effort to fail and a propensity to shear across extended columns. The deeper persistent weak layers didn't react in extended column tests and were stubborn to fail in column tests. Those weaknesses are still there, I just didn't get any major feedback from them today. Increasing danger with more snow and wind expected.
Avalanche Problem #2
Problem
Wind Drifted Snow
Trend
Increasing Danger
Problem #2 Comments
While not a big issue where I was today, the winds have been cranking since the storm started and just before. Winds have been strong from the SSE, S and SW. If you are traveling in the wind zone on the lee of these aspects you are most certainly in the high probability category for avalanches. It's just not even worth being in the wind zone right now, you're asking for nothing but trouble. More snow, more wind, increasing danger.
Snow Profile
Aspect
Northwest
Elevation
8,900'
Slope Angle
32°
Comments
Only traveled to 9K and there was more snow than I had anticipated with around 2 inches of water weight. The surface facets from the end of January were not bonding well with the new storm snow. These grains are well preserved and are 2mm in size in the pit I dug. This layer will take some time to stabilize, which won't be anytime soon. I was curious to find the deeper persistent weaknesses were not reactive in ECT's. This being said, I still would be respectful of these weaknesses; a slide breaking in the January or December snow would be catastrophic. The new snow/old snow interface failed with easy to easy/medium effort with clean, planar shears. I did find one weakness in the new snow about 8" down on a density inversion.
Trailbreaking and snowmobiling were relatively easy and supportable considering the amount of new snow we received. Wintry conditions today.
The strong winds and amount of water weight we've gotten in the last 36 hours are enough to make me step back and take note but with MORE wind and snow expected, it's pretty obvious it's not the time to push it. Tomorrow, considerable danger in steep, mid elevation terrain and high danger at and above treeline, especially in terrain on the north half of the compass. Tread lightly.
Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable