Mckenzie River Above South Fork, Near Rainbow
Mckenzie River · Pacific NW · USGS gage 14159110
Coldwater (summer mean 11.2°C — prime coldwater).
Water
57°F
Flow
1,440 cfs
Air
73°F
Sky
1%
Pressure
30.03 in
Wind
9 mph
Predicted hatches · 2026-08-03
PredictedSpotted / Summer CaddisHydropsyche spp.0.60
Predicted by conditions; no reports yet. water 14.1°C (57°F) sits in the prime band (14-19°C); peak season; watch evening, last hour of light.
flies: Elk Hair Caddis #14-16, Iris Caddis, X-Caddis
PredictedPale Morning DunEphemerella spp.0.30
water 14.1°C (57°F) sits in the prime band (13-18°C); shoulder of the season; watch late morning to early afternoon.
flies: PMD Comparadun #16-18, Sparkle Dun, Pheasant Tail #16
PredictedMidgeChironomidae0.16
water 14.1°C (57°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.