North end clearly melted on Sep 22; south end assumed gone too (small to begin with).
Site shows Gone until Oct 5, although the satellite last saw 0.92 ha on Sep 4.
Upper Spruce Canyon
40.3354, −105.7084 · 3,503 m · N · 18° · 0.92 ha on Sep 4
Gone · ground checkSatellite · Snow · small 0.92 ha
The ground report is shown first until Oct 5, then the satellite status takes over again.
See what we saw
Drag the handle to compare two passes. The blue line is what the scanner counted as snow.
A · JUL 14 · CLEAR · 3.5 HAB · SEP 4 · CLEAR · 0.92 HA
0 200 m
N
Every pass this season · pick A and B
Sentinel-2 L2A true color, read at 20 m. One pixel is 0.04 ha. A strip narrower than about 40 m can hold skiable snow and show nothing. By mid-September, north-facing cirques sit in shadow at the late-morning overpass, so one zero isn't proof of anything.
How we got to this status
- The Sep 24 pass was cloudy over the site (100%), so a cloudy pass counts as no look, not as zero. This uses the Sep 4 pass.
- Sep 4 pass fully covers the site and is clear over it.
- 23 snow pixels in 2 clusters, which is 0.92 ha.
- Not flagged as possible new snow.
- Under 1 ha, so it's marked Small.
- A ground report from Sep 25 is less than 10 days old, so it's shown first until Oct 5.
Scan run 1 · status rules 2026.09-2
NDSI > 0.4 · NIR ≥ 0.6 × green · SCL mask · algorithm 2026.09-2
NDSI > 0.4 · NIR ≥ 0.6 × green · SCL mask · algorithm 2026.09-2
Getting there
- Approach
- ~5 h · 10 km one way
- Route
- Fern Lake TH, via Fern and Spruce lakes; off-trail above Loomis Lake
- Estimate
- Munter rule from straight-line distance and climb. Rough.