Snake River near Blackfoot
Snake River · Rockies · USGS gage 13069500
Trout (marginal) (summer mean 18.7°C — trout, warm in summer).
Water
56°F
Flow
3,200 cfs
Air
66°F
Sky
0%
Pressure
29.98 in
Wind
13 mph
Predicted hatches · 2026-09-14
PredictedSpotted / Summer CaddisHydropsyche spp.0.38
Predicted by conditions; no reports yet. water 13.5°C (56°F) is warming toward the prime band (14-19°C); shoulder of the season; watch evening, last hour of light.
flies: Elk Hair Caddis #14-16, Iris Caddis, X-Caddis
PredictedMidgeChironomidae0.21
water 13.5°C (56°F) is cooling past the prime band (1-10°C); shoulder of the season; 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.