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
2,000 cfs
Air
38°F
Sky
14%
Pressure
29.87 in
Wind
6 mph
Predicted hatches · 2026-10-30
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
PredictedBlue-Winged OliveBaetis spp.0.17
water 13.5°C (56°F) is cooling past the prime band (6-11°C); peak season; 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.