New Fork River Near Big Piney
New Fork River · Rockies · USGS gage 09205000
Trout (marginal) (summer mean 18.0°C — trout, warm in summer).
Water
46°F
Flow
290 cfs
Air
41°F
Sky
0%
Pressure
29.99 in
Wind
4 mph
Predicted hatches · 2026-09-15
PredictedBlue-Winged OliveBaetis spp.0.50
Predicted by conditions; no reports yet. water 7.5°C (46°F) sits in the prime band (6-11°C); shoulder of the season; watch midday, especially overcast afternoons.
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PredictedMidgeChironomidae0.50
Predicted by conditions; no reports yet. water 7.5°C (46°F) sits in 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.