Blackrock Creek below Split Rock Creek, near Moran
Blackrock Creek · Rockies · USGS gage 13011820
Coldwater (summer mean 13.0°C — prime coldwater).
Water
33°F
Flow
19 cfs
Air
36°F
Sky
100%
Pressure
29.95 in
Wind
12 mph
Predicted hatches · 2026-10-30
PredictedMidgeChironomidae0.20
water 0.4°C (33°F) is warming toward 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.