Ski areas are closing and each has a different uphill travel policy. Remember that areas open to uphill travel are no longer doing any avalanche mitigation work and must be treated as backcountry terrain.
Alta Ski Area is closed to uphill travel. They will be operating for the next few weekends.
Following a cold front that arrived on Monday evening, snowfall began during the early hours of Tuesday morning, continuing through the early afternoon.
As of 6 pm Tuesday evening, storm totals include:
> Upper Little Cottonwood Canyon 15" snow with 1" water.
> Brighton (Big Cottonwood Canyon) 9" snow with 0.61" water.
Winds have been out of the west/northwest, gusting in the 20's and 30's mph at the upper elevations, with 11,000' gusts in the 50's mph.
Watch this video about things to watch for in the spring.
The old snow surface froze solidly (as well as forming a dust layer from the strong pre-frontal winds on Monday) prior to the onset of snowfall, and the storm snow did not bond well to this crust. Observers from Tuesday reported sensitive soft slabs and wind drifts at the upper elevations, especially during periods of heavy precipitation intensity.
A wind slab avalanche on an east aspect in Cardiff Fork (Mark White photo) where you can see the storm snow on top of temperature dust/crust.
A soft-slab slide on a northeast aspect in Upper Days Fork:
Cornices that formed from the west/northwest winds were also sensitive along upper elevation ridge lines.
We will continue to post all observations, so please keep sending those in.
Tuesday Night - Clearing skies with temperatures in the teens. West/northwest winds gusting into the 20's and 30's, and decreasing overnight.
Wednesday - Sunshine with temperatures warming into the 30's and low 40's. Westerly winds generally light, switching to the southwest later in the day.
Thursday/Friday - Increasing clouds with winds out of the southwest. Continued mild with temperatures in the 30's and 40's. A chance of light snow possible Friday.
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This information does not apply to developed ski areas or highways where avalanche control is normally done. This advisory is from the U.S.D.A. Forest Service, which is solely responsible for its content. This advisory describes general avalanche conditions and local variations always occur.