Big Beaver Creek Near Newhalem
Big Beaver Creek · Pacific NW · USGS gage 12172000
Coldwater (summer mean 10.6°C — prime coldwater).
Water
50°F
Flow
557 cfs
Air
76°F
Sky
100%
Predicted hatches · 2026-06-16
PredictedMidgeChironomidae0.48
Predicted by conditions; no reports yet. water 10.2°C (50°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
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.