Sep 22 pixels read as rock/debris (NDSI negative). Sep 4 was cloud over this exact spot.
Site now shows Gone. The satellite agreed on Sep 22.
Sprague Glacier
40.3424, −105.7335 · 3,616 m · NE · 20° · 0 ha on Sep 22
Gone · ground checkSatellite · Gone
The ground report is shown first until Oct 3, 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 · 3.7 HAB · SEP 22 · CLEAR · 0 PX
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 22 pass.
- Sep 22 pass fully covers the site and is clear over it.
- No snow pixels in the window (under 3 px counts as zero).
- Not flagged as possible new snow.
- A second clear zero in a row (after Aug 28), so it reads Gone.
- A ground report from Sep 23 is less than 10 days old, so it's shown first until Oct 3.
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 · 11 km one way
- Route
- Bear Lake TH, off-trail; check the route on CalTopo
- Estimate
- Munter rule from straight-line distance and climb. Rough.