USGS Streamgage 06903700
South Fork Chariton River near Promise City, IA
South Fork Chariton River near Promise City, IA is USGS streamgage 06903700, monitoring river discharge in hydrologic subbasin 10280201. It drains a watershed of about 168 square miles. Discharge records at this site go back to 1965. Typical flow runs near 6.7 cfs in July and 45 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 168 sq mi
- Gauge elevation
- 937 ft
- Subbasin (HUC-8)
- 10280201
- Coordinates
- 40.80044, -93.19269
- USGS site number
- 06903700
- Records begin
- 1965-09-21 (61 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 59 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 | 0.9 | 8.1 | 69.1 | |
| February | 2.3 | 23.4 | 234.1 | |
| March | 6.6 | 44.2 | 435.4 | |
| April | 8.9 | 45 | 576.9 | |
| May | 5.6 | 37.8 | 548.1 | |
| June | 1.5 | 18.9 | 459.9 | |
| July | 0.6 | 6.7 | 280.4 | |
| August | 0.4 | 2.8 | 85 | |
| September | 0.4 | 2.2 | 117.9 | |
| October | 0.3 | 4.5 | 141.2 | |
| November | 0.9 | 9.5 | 99 | |
| December | 0.6 | 11.2 | 109.3 |
All values in cubic feet per second (cfs).