West Branch Delaware River At Stilesville
West Branch Delaware River · Northeast · USGS gage 01425000
Coldwater (summer mean 9.0°C — prime coldwater).
Water
55°F
Flow
743 cfs
Air
53°F
Sky
34%
Pressure
29.99 in
Wind
6 mph
Predicted hatches · 2026-10-30
PredictedBlue-Winged OliveBaetis spp.0.33
water 13.0°C (55°F) is cooling past the prime band (6-11°C); peak season; 8 days sustained ≥4°C; watch midday, especially overcast afternoons.
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PredictedMidgeChironomidae0.25
water 13.0°C (55°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.