White River At Calico Rock
White River · Ozarks · USGS gage 07060500
Trout (marginal) (summer mean 16.4°C — trout, warm in summer; very large river (35,800 cfs)).
Water
71°F
Flow
5,050 cfs
Air
80°F
Sky
0%
Pressure
29.96 in
Wind
3 mph
Predicted hatches · 2026-09-15
PredictedSlate Drake / IsonychiaIsonychia spp.0.83
Predicted by conditions; no reports yet. water 21.5°C (71°F) is cooling past the prime band (16-21°C); peak season; 8 days sustained ≥14°C; watch afternoon/evening; nymphs crawl to shore to emerge.
flies: Isonychia #10-12, Slate Drake, Leadwing Coachman
PredictedHopper / TerrestrialsAcrididae (grasshoppers)0.56
Predicted by conditions; no reports yet. water 21.5°C (71°F) sits in the prime band (17-24°C); shoulder of the season; 8 days sustained ≥14°C; warm sun favors it; watch warm, breezy afternoons.
flies: Morrish Hopper #8-12, Chubby Chernobyl, Dave's Hopper
PredictedTricoTricorythodes spp.0.42
Predicted by conditions; no reports yet. water 21.5°C (71°F) is cooling past the prime band (16-21°C); shoulder of the season; 8 days sustained ≥15°C; watch early morning spinner falls.
flies: Trico Spinner #20-24, CDC Trico, Griffith's Gnat
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.