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Hatch predictions for 300+ US rivers — built from live water & weather, then confirmed against real fly-shop reports.

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E Br Neversink River Northeast Of Denning

E Br Neversink River Northeast Of Denning · Northeast · USGS gage 0143400680

Coldwater (summer mean 14.3°C — prime coldwater).

Water
54°F
Flow
8 cfs
Air
47°F
Sky
0%
Pressure
30.22 in
Wind
9 mph
Predicted hatches · 2026-09-15
PredictedBlue-Winged OliveBaetis spp.0.32
water 12.0°C (54°F) is cooling past the prime band (6-11°C); shoulder of the season; 8 days sustained ≥4°C; watch midday, especially overcast afternoons.
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PredictedMidgeChironomidae0.32
water 12.0°C (54°F) is cooling past 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.