USGS Streamgage 06605850
Little Sioux River at Linn Grove, IA
Little Sioux River at Linn Grove, IA is USGS streamgage 06605850, monitoring river discharge in hydrologic subbasin 10230003. It drains a watershed of about 1,548 square miles. Discharge records at this site go back to 1953. Typical flow runs near 549.6 cfs in July and 1,239.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 1,548 sq mi
- Gauge elevation
- 1,261 ft
- Subbasin (HUC-8)
- 10230003
- Coordinates
- 42.89631, -95.243
- USGS site number
- 06605850
- Records begin
- 1953-06-10 (73 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 54 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 | 22.1 | 150.6 | 600.7 | |
| February | 24.3 | 196.6 | 969.1 | |
| March | 102.3 | 661.2 | 2,872.9 | |
| April | 171.7 | 1,239.3 | 3,866.3 | |
| May | 207.7 | 1,195.8 | 3,906.1 | |
| June | 250.5 | 1,102 | 4,407.7 | |
| July | 113.3 | 549.6 | 2,753.9 | |
| August | 58.8 | 225.1 | 1,196.4 | |
| September | 42.4 | 146.4 | 1,222.3 | |
| October | 39.5 | 180.1 | 1,746.8 | |
| November | 42.9 | 236.9 | 1,219.7 | |
| December | 29.6 | 190.1 | 853.6 |
All values in cubic feet per second (cfs).