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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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Nf Skokomish River below Staircase Rpds near Hoodsport

Nf Skokomish River · Pacific NW · USGS gage 12056500

Coldwater (summer mean 12.3°C — prime coldwater).

Water
52°F
Flow
115 cfs
Air
58°F
Sky
0%
Pressure
30.00 in
Wind
6 mph
Predicted hatches · 2026-06-18
PredictedGreen DrakeDrunella spp.1.00
Predicted by conditions; no reports yet. water 11.3°C (52°F) sits in the prime band (11-15°C); peak season; 7 days sustained ≥10°C; watch midday, often cloudy.
flies: Green Drake Parachute #10-12, Cripple, Hares Ear #10
PredictedMidgeChironomidae0.39
Predicted by conditions; no reports yet. water 11.3°C (52°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.