Manistee River Near Grayling
Manistee River · Driftless / Midwest · USGS gage 04123500
Trout (marginal) (summer mean 16.5°C — trout, warm in summer).
Water
46°F
Flow
180 cfs
Air
30°F
Sky
36%
Pressure
30.43 in
Wind
2 mph
Predicted hatches · 2026-10-31
PredictedBlue-Winged OliveBaetis spp.0.90
Predicted by conditions; no reports yet. water 7.6°C (46°F) sits in the prime band (6-11°C); peak season; 8 days sustained ≥4°C; bright high pressure — tougher; watch midday, especially overcast afternoons.
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PredictedMidgeChironomidae0.45
Predicted by conditions; no reports yet. water 7.6°C (46°F) sits in the prime band (1-10°C); shoulder of the season; 8 days sustained ≥0°C; bright high pressure — tougher; 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.