Observation: Silver Creek

Observation Date
4/13/2025
Observer Name
Kelly
Region
Provo » American Fork » Silver Creek
Location Name or Route
Silver Creek-American Fork Twins
Weather
Sky
Broken
Wind Direction
West
Wind Speed
Moderate
Weather Comments
Winds were blowing from the west moderate to strong at the ridgetops and swirly in the drainages. The wind was keeping the snow surface cool above 10,000', but was not strong enough to counteract the strong April sun below that elevation. Skies were overcast to start the day and the clouds slowly cleared out and the sun broke through.
Snow Characteristics
Snow Surface Conditions
Melt-Freeze Crust
Damp
Snow Characteristics Comments
There was a trace of new snow overnight, that was barely noticeable on most surfaces. Before 7am there were some wind plumes noted off the upper ridgelines of White Pine, but these did not form any new wind drifts. Snow surface was frozen solid at all elevations in the early morning hours. By 11AM the east-south-west facing slopes had lost their supportability below 9,500' and out of the wind zone. North followed an hour or so later as the surface melt-freeze crust broke down. There was great skiing to be had at the highest elevations on smooth slopes that hadn't been affected by wet loose avalanches or roller balls.
Photo of new snow.

Photo of smooth west facing surface looking back towards the Provo Area Mountains
Avalanche Problem #1
Problem
Wet Snow
Problem #1 Comments
There was some rollerball activity on steep slopes, mostly underneath cliff bands on all aspects from the last few days. I also noticed some wet loose avalanches that occurred earlier this week on steep northeast and south facing slopes around 10,600' in elevation.

Snow Profile
Aspect
Southwest
Elevation
11,300'
Slope Angle
23°
Comments
This snowpit was on a southwest facing aspect. Total height of snow was around 3' (100cm) and was pretty isothermal (same temperature) with the exception of the surface snow that was below freezing. Isothermal snow is interesting in that it can be frozen solid like what I found today, or west mush, like what I found yesterday. Isothermic snow can exist as either a liquid, solid, or gas. So even though today's snowpit was frozen solid in the morning, I would guess that if someone dug in the same location later this afternoon the upper layers would be complete mush potentially down to the crust 16" (40cm) from the ground.

As we wrap up our forecast season, I would like to say thanks to the community for all the great observations and avalanche write-ups that were submitted.
Today's Observed Danger Rating
None
Tomorrows Estimated Danger Rating
None
Coordinates