M Fork Tumalo Creek below Prowell Springs, near Bend
M Fork Tumalo Creek · Pacific NW · USGS gage 14070624
Coldwater (summer mean 7.5°C — prime coldwater).
Water
46°F
Flow
18 cfs
Air
67°F
Sky
71%
Predicted hatches · 2026-06-15
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; 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.