Salmon Trout River Near Big Bay
Salmon Trout River · Driftless / Midwest · USGS gage 04043238
Coldwater (summer mean 14.8°C — prime coldwater).
Water
45°F
Flow
5 cfs
Air
38°F
Sky
70%
Pressure
30.27 in
Wind
7 mph
Predicted hatches · 2026-10-30
PredictedBlue-Winged OliveBaetis spp.1.00
Predicted by conditions; no reports yet. water 7.1°C (45°F) sits in the prime band (6-11°C); peak season; 8 days sustained ≥4°C; overcast skies favor it; watch midday, especially overcast afternoons.
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PredictedMidgeChironomidae0.48
Predicted by conditions; no reports yet. water 7.1°C (45°F) sits in the prime band (1-10°C); shoulder of the season; 8 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.