Rock River at Fort Atkinson, WI
USGS Site No: 05427085 • Rock River • Jefferson County, WI
Rock River at Fort Atkinson, WI on the Rock River is currently at 1,710 cfs (Normal — 69th percentile for this date) . Gage height: 11.82 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 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 | 298 | |
| 25th | Low threshold | 537 | |
| 50th (Median) | Normal (median) | 759 | |
| 75th | High threshold | 2,000 | Today: 1,710 cfs |
| 95th | Very High threshold | 4,660 |
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 | 1,950 | — |
| May 27, 2026 | 2,050 | — |
| May 26, 2026 | 2,120 | — |
| May 25, 2026 | 2,210 | — |
| May 24, 2026 | 2,290 | — |
| May 23, 2026 | 2,330 | — |
| May 22, 2026 | 2,420 | — |
| May 21, 2026 | 2,470 | — |
| May 20, 2026 | 2,550 | — |
| May 19, 2026 | 2,530 | — |
| May 18, 2026 | 2,560 | — |
| May 17, 2026 | 2,660 | — |
| May 16, 2026 | 2,710 | — |
| May 15, 2026 | 2,730 | — |
| Apr 20, 2026 | 9,760 | — |
| Apr 19, 2026 | 10,100 | — |
| Apr 18, 2026 | 9,620 | — |
| Apr 17, 2026 | 8,870 | — |
| Apr 16, 2026 | 8,130 | — |
| Apr 15, 2026 | 6,310 | — |
| Apr 14, 2026 | 4,930 | — |
| Apr 13, 2026 | 4,470 | — |
| Apr 12, 2026 | 4,140 | — |
| Apr 11, 2026 | 4,050 | — |
| Apr 10, 2026 | 4,000 | — |
| Apr 9, 2026 | 3,940 | — |
| Apr 8, 2026 | 3,930 | — |
| Apr 7, 2026 | 4,130 | — |
| Apr 6, 2026 | 4,080 | — |
| Apr 5, 2026 | 3,810 | — |
Station Information
- USGS Site No
- 05427085
- State
- WI
- County
- Jefferson County
- Coordinates
- 42.9290, -88.8395
- Drainage Area
- 2,240 mi²
- Datum (ft)
- 765.2
- HUC Code
- 07090002
Flood Stage Thresholds
- Action Stage
- 14.5 ft
- Flood Stage
- 16.0 ft
- Moderate Flood
- 17.0 ft
- Major Flood
- 18.0 ft
Currently 4.18 ft below flood stage.
Recent Extremes
- Max discharge
-
10,100 cfsApr 19, 2026
- Min discharge
-
476 cfsNov 11, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Rock River at Jefferson, WILow4.9 mi · 373 cfs
-
Crawfish River at Milford, WIHigh11.8 mi · 468 cfs
-
Rock River at Watertown, WIHigh18.8 mi · 734 cfs
-
Rock River Near Lebanon, WIVery High26.6 mi · 520 cfs
-
Rock River at Rockton, ILNormal35.1 mi · 4,690 cfs