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Observation: Cutler Ridge

Observation Date
1/18/2020
Observer Name
Derek DeBruin
Region
Ogden » Ben Lomond » Cutler Ridge
Location Name or Route
Ben Lomond, Cutler Ridge
Weather
Sky
Broken
Wind Direction
West
Wind Speed
Moderate
Weather Comments
Partly to mostly cloudy skies this morning. Trailhead temp of 13F around 0715 had warm to about 19 or 20F around 1000am back at the trailhead. Low elevation wind was quite calm, but around 7000ft winds were light, increasing to consistent moderate between 7500 and 8000ft. Surface snow transport was occurring above 7000ft or so, and sizable plumes were visible from a distance on the shoulder of Ben Lomond (SE ridge of summit pyramid).
Snow Characteristics
New Snow Depth
6"
New Snow Density
Medium
Snow Surface Conditions
Powder
Dense Loose
Wind Crust
Snow Characteristics Comments
Ski pen was consistently ankle to boot top with 6-10" of new snow; boot pen was upwards of a meter. Despite wind effects in the middle elevations, surface snow was still very enjoyable dense powder, though occasiaonlly one found the wind packed snow layer beneath in the most exposed locations. In the low elevations I found the sparkle of small and inconsistent surface hoar.
Red Flags
Red Flags
Recent Avalanches
Wind Loading
Red Flags Comments
Natural D1-2 avalanches yesterday (17 January) all along the headwall between Ben Lomond and Willard Peak. Also wet activity on the steep southerlies of Island Peak above Cutler Creek. See avalanche obs for full descriptions and photos.
Snow Profile
Aspect
North
Elevation
7,800'
Slope Angle
28°
Comments
Had a conversation with my friend Ben last night who reported an avalanche just above his house due to cross loading from wind in a small gully.
In 10 years he's never seen one there. It was a good reminder that intuition and experience are only aids to judgment when the context is consistent. When novel or unusual situations present themselves, it's important to recognize them and leave wide margin. It was quite warm and sunny in the valley yesterday afternoon but cool and clear enough overnight that there was frost on the windshield.
With this all in mind, I headed up this morning expected evidence of wet snow from yesterday afternoon, a bit of surface hoar somewhere, and wind effects all over the place. This all verified to one degree or another (details above), but I generally found great riding conditions in dense powder. Cornicing on Chilly Peak ridgeline was surprisingly little (pictured below). Winds were sufficient, however, to begin cornice development on the Hogsback Ridge on the way to the Ben Lomond saddle.
Dug a pit in what is normally sheltered terrain (a bit of surface wind effect was evident as light scalloping on the snow surface) near the weather station on a N facing 28 degree slope at 7800ft. Snow depth was 225cm, with ECTN28 cracking on a graupel layer 60cm down from the snow surface. No other results of note. Snow structure in the top 1.5m looks pretty good, generally right side up with only minor hardness inversions of about a half a step between 4F and 1F layers.
Today's Observed Danger Rating
None
Tomorrows Estimated Danger Rating
None