Bighorn River At Bridge, At St. Xavier
Bighorn River · Rockies · USGS gage 06287800
Coldwater (summer mean 14.8°C — prime coldwater).
Water
56°F
Flow
1,670 cfs
Air
69°F
Sky
100%
Pressure
29.83 in
Wind
27 mph
Predicted hatches · 2026-09-14
ConfirmedSpotted / Summer CaddisHydropsyche spp.0.52
Model says likely and 1 recent report confirm it. water 13.4°C (56°F) is warming toward the prime band (14-19°C); shoulder of the season; 2 days sustained ≥12°C; watch evening, last hour of light.
reports: Yellow Dog — Bighorn River Reports
flies: Elk Hair Caddis #14-16, Iris Caddis, X-Caddis
PredictedMidgeChironomidae0.22
water 13.4°C (56°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.