Observation: Moab

Observation Date
2/16/2018
Observer Name
Dave Garcia
Region
Moab
Location Name or Route
Julie's, North Woods, Pre Laurel Peak
Weather
Sky
Scattered
Wind Direction
Southwest
Wind Speed
Light
Weather Comments
Cold in the morning to start. Forecasted to be a bluebird day, but the sun didn't really poke out until about 2PM.
Snow Characteristics
New Snow Depth
7"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments

Yesterday's storm dropped a total of 7" bringing totals from the past week to about 20". Surface snow is light density powder and skiing is great. The snow from the previous storms (2/10 and 2/12) is well consolidated and keeping us on top. I measured 65cm (25 in.) of snow in the North Woods today.

Red Flags
Red Flags
Recent Avalanches
Wind Loading
Collapsing
Poor Snowpack Structure
Red Flags Comments
Big red flags today including recent natural avalanches, multiple collapses, and evidence of recent wind loading. And we still have poor snowpack structure. I observed two natural avalanches in Talking Mountain Cirque. One on a steep NE aspect and the other on a steep NW aspect. It is most likely that these slides occured yesterday (2/15). We were on pre laurel peak yesterday, but visiblilty was low and we could not see into Talking Mountain Cirque.
Avalanche Problem #1
Problem
Wind Drifted Snow
Trend
Decreasing Danger
Problem #1 Comments

Monday's strong southerly winds loaded north facing slopes. These are now old and probably hard to trigger. Winds backed off since Monday, but some loading is still occurring on NE slopes. I noticed small cornices forming on the ridge line above the Horse Creek Chutes. It is possible that the natural avalanches I observed today were triggered by wind loading. It is hard to say for sure since I observed them from a far distance. Winds were well behaved today and this problem should be trending down for now.

Avalanche Problem #2
Problem
Persistent Weak Layer
Trend
Same
Problem #2 Comments

We've all known about our persistent slab problem for some time now. We haven't seen any avalanche activity because we haven't had much snowfall to put a heavy load on these weak layers. And skiers have been prudently avoiding avalanche terrain. Now we have three storms in a row and we start to get some natural activity. Looks like we've got enough weight now to overburden our buried weak layers. We experienced multiple collapses yesterday while traveling to the top of the North Woods. Today I traveled the opposite ridge line (west ridge of the North Woods) and experienced five large collapses.

Wind loading on North facing Noriegga's.

Recent natural avalanches in Talking Mountain Cirque. Gotta stick with considerable danger based on recent natural avalanches and widespread collapsing.

Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable