Iowa River at Marshalltown, IA
USGS Site No: 05451500 • Iowa River • Marshall County, IA
Iowa River at Marshalltown, IA on the Iowa River is currently at 1,110 cfs (Normal — 46th percentile for this date) . Gage height: 11.49 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 246 | |
| 25th | Low threshold | 576 | |
| 50th (Median) | Normal (median) | 1,220 | Today: 1,110 cfs |
| 75th | High threshold | 2,090 | |
| 95th | Very High threshold | 7,480 |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 1,200 | — |
| May 27, 2026 | 1,290 | — |
| May 26, 2026 | 1,390 | — |
| May 25, 2026 | 1,490 | — |
| May 24, 2026 | 1,680 | — |
| May 23, 2026 | 1,870 | — |
| May 22, 2026 | 2,030 | — |
| May 21, 2026 | 2,300 | — |
| May 20, 2026 | 2,550 | — |
| May 19, 2026 | 2,070 | — |
| May 18, 2026 | 1,290 | — |
| May 17, 2026 | 1,130 | — |
| May 16, 2026 | 914 | — |
| May 15, 2026 | 908 | — |
| Apr 20, 2026 | 2,580 | — |
| Apr 19, 2026 | 3,060 | — |
| Apr 18, 2026 | 3,850 | — |
| Apr 17, 2026 | 5,030 | — |
| Apr 16, 2026 | 4,960 | — |
| Apr 15, 2026 | 2,730 | — |
| Apr 14, 2026 | 2,530 | — |
| Apr 13, 2026 | 2,840 | — |
| Apr 12, 2026 | 3,180 | — |
| Apr 11, 2026 | 3,560 | — |
| Apr 10, 2026 | 4,030 | — |
| Apr 9, 2026 | 4,300 | — |
| Apr 8, 2026 | 4,850 | — |
| Apr 7, 2026 | 5,860 | — |
| Apr 6, 2026 | 7,460 | — |
| Apr 5, 2026 | 8,720 | — |
Station Information
- USGS Site No
- 05451500
- State
- IA
- County
- Marshall County
- Coordinates
- 42.0658, -92.9077
- Drainage Area
- 1,532 mi²
- Datum (ft)
- 852.9
- HUC Code
- 07080208
Flood Stage Thresholds
- Action Stage
- 14.0 ft
- Flood Stage
- 19.0 ft
- Moderate Flood
- 23.0 ft
- Major Flood
- 26.0 ft
Currently 7.51 ft below flood stage.
Recent Extremes
- Max discharge
-
9,470 cfsJul 31, 2025
- Min discharge
-
289 cfsDec 1, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Timber Creek Near Marshalltown, IANormal4.9 mi · 110 cfs
-
Iowa River at County Highway E49 Near Tama, IANormal15.6 mi · 1,470 cfs
-
South Fork Iowa River NE Of New Providence, IANormal21.3 mi · 180 cfs
-
Richland Creek Near Haven, IANormal25.1 mi · 36 cfs
-
Indian Creek Near Mingo, IANormal27.3 mi · 256 cfs