Salmon Trout River Near Big Bay
Salmon Trout River · Driftless / Midwest · USGS gage 04043238
Coldwater (summer mean 14.8°C — prime coldwater).
Water
52°F
Flow
5 cfs
Air
56°F
Sky
100%
Pressure
29.82 in
Wind
21 mph
Predicted hatches · 2026-09-15
PredictedBlue-Winged OliveBaetis spp.0.52
Predicted by conditions; no reports yet. water 11.3°C (52°F) is cooling past the prime band (6-11°C); shoulder of the season; 7 days sustained ≥4°C; overcast skies favor it; watch midday, especially overcast afternoons.
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PredictedMidgeChironomidae0.39
Predicted by conditions; no reports yet. water 11.3°C (52°F) is cooling past the prime band (1-10°C); shoulder of the season; 7 days sustained ≥0°C; watch midday, especially cold months.
flies: Zebra Midge #18-22, Griffith's Gnat, Disco Midge
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.