Rock River

Streamflow Hydrology Weather


Rock River Levels

June 22 2024

115,042 ACRE-FT

Discharge Volume Today
-5660.0 cfs (-8.89%) since yesterday
118.05% of Normal 10 Streamgauges

Total streamflow across the Rock River was last observed at 58,000 cfs, and is expected to yield approximately 115,042 acre-ft of water today; about 118% of normal. Average streamflow for this time of year is 49,134 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 Rock Valley reporting a streamflow rate of 58,000 cfs. However, the streamgauge with the highest stage along the river is the Rock River Below Tom Creek At Rock Rapids with a gauge stage of 28.51 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 2024-06-22
Streamflow 58,000.0 cfs
Percent of Normal 118.05%
Maximum 188,530.0 cfs
2019-03-16

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
4740 cfs 28.51 ft 94.26
Rock River Near Rock Valley
USGS 06483500
58000 cfs 25.83 ft 701.1
Rock River At Horicon
USGS 05424057
961 cfs 6.94 ft 14
Rock River At Watertown
USGS 05425500
2180 cfs 4.04 ft 6.34
Rock River At Afton
USGS 05430500
6860 cfs 8.89 ft -5.77
Rock River At Robert Street At Fort Atkinson
USGS 05427085
4520 cfs 14.76 ft -0.44
Rock River At Rockton
USGS 05437500
10400 cfs 8.1 ft 1.96
Rock River At Byron
USGS 05440700
10800 cfs 8.99 ft 1.89
Rock River At Como
USGS 05443500
11300 cfs 7.18 ft 4.63
Rock River Near Joslin
USGS 05446500
12300 cfs 9.4 ft -3.91

Peak Annual Discharge

Rock River Maximum Total Discharge

Seasonal Comparison

Rock River Year Over Year Discharge


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