Observation: Provo Canyon

Observation Date
1/2/2025
Observer Name
Gagne/Covington
Region
Provo » Provo Canyon
Location Name or Route
Big Springs
Weather
Sky
Overcast
Precipitation
Light Snowfall
Wind Speed
Calm
Weather Comments
Warm and cloudy with greenhousing at low elevations.
Snow Characteristics
New Snow Depth
3"
New Snow Density
High
Snow Surface Conditions
Powder
Damp
Snow Characteristics Comments
The new snow was damp below 7k, with somewhat drier snow above that elevation. 5-10 cms new snow.
Red Flags
Red Flags
Poor Snowpack Structure
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Same
Problem #1 Comments
Persistent weak layer found on mid and upper elevations facing northwest through east. Above 8,000' the snowpack is 100 - 160 cms.
Two pits on northerly aspects had
ECTP29 down 120 cms with PST 45/130 END
ECTX
In the profile shown below, the facets down near the ground are gaining strength as we add more snow.
Snow Profile
Aspect
Northwest
Elevation
8,500'
Comments
Propagation Saw Test on the above pit scoring 45/130 END. Although the ECT score (ECPT29) demonstrates it would be hard to trigger an avalanche, the PST demonstrated it is still possible. At mid elevations, the likely area where you could trigger an avalanche failing on the PWL would be in steeper and thinner snowpack areas, such as around rock outcrops.
Video
Photos of avalanches that ran naturally, likely during the Dec 27 avalanche cycle. These were all on northerly aspects above 8,000'. We are unsure if any ran on faceted layers.
Deeper snowpacks that are showing signs of strengthening - at least through the mid-elevations - are encouraging signs. We would still give the PWL more time before stepping into avalanche terrain on northerly aspects.
Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable
Coordinates