Chestnut Creek At Mouth At Grahamsville
Chestnut Creek · Northeast · USGS gage 01365550
Coldwater (summer mean 15.7°C — prime coldwater).
Water
53°F
Flow
44 cfs
Air
50°F
Sky
61%
Pressure
29.97 in
Wind
5 mph
Predicted hatches · 2026-10-30
PredictedBlue-Winged OliveBaetis spp.0.84
Predicted by conditions; no reports yet. water 11.8°C (53°F) is cooling past 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
PredictedMidgeChironomidae0.35
water 11.8°C (53°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.