Rock River

Streamflow Hydrology Weather

Rock River Levels

September 21 2023

25,198 ACRE-FT

Discharge Volume Today
+11.8 cfs (+0.09%) since yesterday
41.74% of normal Very Low

Total streamflow across the Rock River was last observed at 12,704 cfs, and is expected to yield approximately 25,198 acre-ft of water today; about 42% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 30,434 cfs, with recent peaks last observed on 2019-03-16 when daily discharge volume was observed at 188,530 cfs.

Maximum discharge along the river is currently at the Rock River Near Joslin reporting a streamflow rate of 3,190 cfs. However, the streamgauge with the highest stage along the river is the Rock River At Robert Street At Fort Atkinson with a gauge stage of 11.09 ft. This river is monitored from 10 different streamgauging stations along the Rock River, the highest being situated at an altitude of 1,316 ft, the Rock River Below Tom Creek At Rock Rapids.

Last Updated 2023-09-21
Streamflow 12,704.1 cfs
Percent of Normal 41.74%
Maximum 188,530.0 cfs

About the rock river

The Rock River is a tributary of the Mississippi River that flows through Wisconsin and Illinois. The river is approximately 299 miles long, originating in Horicon Marsh, Wisconsin, and flowing south into Illinois, where it eventually empties into the Mississippi River near Rock Island. The river has played a significant role in the history of the region, serving as a transportation route for Native American tribes and European settlers. The river is also a popular destination for recreational activities, including fishing, boating, and canoeing. Several reservoirs and dams along the river, including the Lake Koshkonong Dam and the Rockford Dam, provide hydroelectric power and flood control. The river is also used for agricultural purposes, with many farms located along its banks.

Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Rock River Below Tom Creek At Rock Rapids
USGS 06483290
19 cfs 6.55 ft -2.06
Rock River Near Rock Valley
USGS 06483500
32 cfs 4.3 ft 0
Rock River At Horicon
USGS 05424057
36 cfs 6.34 ft -19.47
Rock River At Watertown
USGS 05425500
105 cfs 1.04 ft -1.87
Rock River At Afton
USGS 05430500
846 cfs 3.27 ft -0.47
Rock River At Robert Street At Fort Atkinson
USGS 05427085
336 cfs 11.09 ft 20.43
Rock River At Rockton
USGS 05437500
2380 cfs 3.35 ft -1.24
Rock River At Byron
USGS 05440700
2770 cfs 5.17 ft -2.12
Rock River At Como
USGS 05443500
2990 cfs 3.13 ft 0.67
Rock River Near Joslin
USGS 05446500
3190 cfs 4.6 ft 1.27

Peak Annual Discharge

Rock River Maximum Total Discharge

Seasonal Comparison

Rock River Year Over Year Discharge

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