Black Earth Creek near Treatment Plnt @ Cross Plains,Wi
Black Earth Creek · Driftless / Midwest · USGS gage 05406479
Trout (marginal) (summer mean 16.8°C — trout, warm in summer).
Water
57°F
Flow
22 cfs
Air
63°F
Sky
0%
Pressure
29.93 in
Wind
6 mph
Predicted hatches · 2026-08-04
PredictedSpotted / Summer CaddisHydropsyche spp.0.90
Predicted by conditions; no reports yet. water 13.8°C (57°F) is warming toward the prime band (14-19°C); peak season; 8 days sustained ≥12°C; watch evening, last hour of light.
flies: Elk Hair Caddis #14-16, Iris Caddis, X-Caddis
PredictedPale Morning DunEphemerella spp.0.50
Predicted by conditions; no reports yet. water 13.8°C (57°F) sits in the prime band (13-18°C); shoulder of the season; 8 days sustained ≥12°C; watch late morning to early afternoon.
flies: PMD Comparadun #16-18, Sparkle Dun, Pheasant Tail #16
PredictedMidgeChironomidae0.18
water 13.8°C (57°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.