USGS Streamgage 06600500
Floyd River at James, IA
Floyd River at James, IA is USGS streamgage 06600500, monitoring river discharge in hydrologic subbasin 10230002. It drains a watershed of about 886 square miles. Discharge records at this site go back to 1934. Typical flow runs near 184.3 cfs in July and 209.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 886 sq mi
- Gauge elevation
- 1,126 ft
- Subbasin (HUC-8)
- 10230002
- Coordinates
- 42.57639, -96.31156
- USGS site number
- 06600500
- Records begin
- 1934-12-08 (92 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 91 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 6.6 | 39.4 | 228.2 | |
| February | 8.7 | 81.8 | 522.7 | |
| March | 32.3 | 210.8 | 1,291.9 | |
| April | 50.8 | 209.2 | 1,088.9 | |
| May | 40.3 | 230.2 | 1,121.6 | |
| June | 39.5 | 307.1 | 1,520.7 | |
| July | 30.1 | 184.3 | 894.9 | |
| August | 18.5 | 109.4 | 452 | |
| September | 15.3 | 80 | 369.8 | |
| October | 14.5 | 69.2 | 462 | |
| November | 14.2 | 67.1 | 381 | |
| December | 10.7 | 52.2 | 315 |
All values in cubic feet per second (cfs).