Red Butte Creek At Fort Douglas, Near Slc
Red Butte Creek · Rockies · USGS gage 10172200
Coldwater (summer mean 13.6°C — prime coldwater; very low flow (1.1 cfs) — small/seasonal).
Water
58°F
Flow
0 cfs
Air
71°F
Sky
8%
Pressure
29.84 in
Wind
16 mph
Predicted hatches · 2026-09-17
PredictedSpotted / Summer CaddisHydropsyche spp.0.40
Predicted by conditions; no reports yet. water 14.3°C (58°F) sits in the prime band (14-19°C); shoulder of the season; 1 day sustained ≥12°C (wants 2); watch evening, last hour of light.
flies: Elk Hair Caddis #14-16, Iris Caddis, X-Caddis
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.