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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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Snake River At Moose

Snake River · Rockies · USGS gage 13013650

Trout (marginal) (summer mean 16.3°C — trout, warm in summer; very large river (7,100 cfs)).

Water
n/a
Flow
880 cfs
Air
33°F
Sky
4%
Pressure
29.93 in
Wind
2 mph
Predicted hatches · 2026-10-30

No bugs scoring above the noise floor right now.

PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.