Spout Run At Rt 621 Near Millwood
Spout Run · Appalachia · USGS gage 01636316
Trout (marginal) (summer mean 19.2°C — trout, warm in summer).
Water
60°F
Flow
4 cfs
Air
58°F
Sky
0%
Pressure
30.23 in
Wind
2 mph
Predicted hatches · 2026-09-15
PredictedSlate Drake / IsonychiaIsonychia spp.0.86
Predicted by conditions; no reports yet. water 15.8°C (60°F) is warming toward the prime band (16-21°C); peak season; watch afternoon/evening; nymphs crawl to shore to emerge.
flies: Isonychia #10-12, Slate Drake, Leadwing Coachman
PredictedSpotted / Summer CaddisHydropsyche spp.0.48
Predicted by conditions; no reports yet. water 15.8°C (60°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
PredictedTricoTricorythodes spp.0.38
Predicted by conditions; no reports yet. water 15.8°C (60°F) is warming toward the prime band (16-21°C); shoulder of the season; watch early morning spinner falls.
flies: Trico Spinner #20-24, CDC Trico, Griffith's Gnat
PredictedHopper / TerrestrialsAcrididae (grasshoppers)0.29
water 15.8°C (60°F) is warming toward the prime band (17-24°C); shoulder of the season; watch warm, breezy afternoons.
flies: Morrish Hopper #8-12, Chubby Chernobyl, Dave's Hopper
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.