Dry Marsh Run Near Berryville
Dry Marsh Run · Appalachia · USGS gage 01616100
Coldwater (summer mean 14.3°C — prime coldwater; very low flow (2.9 cfs) — small/seasonal).
Water
57°F
Flow
1 cfs
Air
55°F
Sky
0%
Pressure
30.23 in
Wind
5 mph
Predicted hatches · 2026-09-15
PredictedSpotted / Summer CaddisHydropsyche spp.0.48
Predicted by conditions; no reports yet. water 14.1°C (57°F) sits in the prime band (14-19°C); shoulder of the season; watch evening, last hour of light.
flies: Elk Hair Caddis #14-16, Iris Caddis, X-Caddis
PredictedMidgeChironomidae0.15
water 14.1°C (57°F) is cooling past the prime band (1-10°C); shoulder of the season; 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.