Snake River At King Hill
Snake River · Rockies · USGS gage 13154500
Trout (marginal) (summer mean 20.1°C — trout, warm in summer).
Water
56°F
Flow
6,510 cfs
Air
57°F
Sky
91%
Pressure
29.81 in
Wind
7 mph
Predicted hatches · 2026-10-30
PredictedMidgeChironomidae0.20
water 13.6°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
PredictedBlue-Winged OliveBaetis spp.0.15
water 13.6°C (56°F) is cooling past the prime band (6-11°C); peak season; 8 days sustained ≥4°C; overcast skies favor it; watch midday, especially overcast afternoons.
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.