La Crosse River @ Cnty Trunk Highwy Bb near Tomah,Wi
La Crosse River @ Cnty Trunk Highwy Bb · Driftless / Midwest · USGS gage 05382267
Trout (marginal) (summer mean 17.3°C — trout, warm in summer).
Water
56°F
Flow
126 cfs
Air
59°F
Sky
99%
Pressure
29.82 in
Wind
6 mph
Predicted hatches · 2026-09-15
PredictedSpotted / Summer CaddisHydropsyche spp.0.38
Predicted by conditions; no reports yet. water 13.5°C (56°F) is warming toward the prime band (14-19°C); shoulder of the season; 8 days sustained ≥12°C; watch evening, last hour of light.
flies: Elk Hair Caddis #14-16, Iris Caddis, X-Caddis
PredictedMidgeChironomidae0.21
water 13.5°C (56°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.