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Weather Forecast Office Milwaukee/Sullivan, WI

North Central River Forecast Center

Hydrograph

River at a Glance

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Tabular Data (UTC)

Tabular Data (CDT)

Datum: NAVD88

Metadata

NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Sugar River at Brodhead are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge

Flood Categories (in feet)

Major Flood Stage:	10
Moderate Flood Stage:	8
Flood Stage:	5
Action Stage:	4.5
Low Stage (in feet):	-9999

Historic Crests
(1) 11.40 ft on 09/13/1915
(2) 10.20 ft on 03/15/2019
(3) 10.07 ft on 03/05/1937
(4) 10.00 ft on 03/14/1929
(5) 9.90 ft on 02/06/1938
(6) 9.86 ft on 03/16/1943
(7) 9.80 ft on 02/28/1948
(8) 9.78 ft on 02/23/1922
(9) 9.76 ft on 02/22/2018
(10) 9.76 ft on 03/22/1975
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 6.39 ft on 04/05/2024 (P)
(2) 5.18 ft on 03/02/2023 (P)
(3) 3.89 ft on 09/13/2022
(4) 4.85 ft on 03/12/2021
(5) 7.53 ft on 10/04/2019
(6) 10.20 ft on 03/15/2019
(7) 5.65 ft on 02/07/2019 (P)
(8) 8.63 ft on 10/04/2018 (P)
(9) 6.26 ft on 09/22/2018 (P)
(10) 6.60 ft on 09/06/2018 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -0.16 ft on 09/19/1959
(2) 0.10 ft on 09/09/2003
(3) 0.35 ft on 09/13/2005
(4) 0.46 ft on 09/14/2012
(5) 0.59 ft on 07/10/2012
Show More Low Water Records

For more information on your flood risk go to www.floodsmart.gov.

Show FEMA's National Flood Hazard Layers

Zoom Level:16

	Gauge Location	Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

If you notice any errors in the below information, please contact our Webmaster
13	In Illinois, residences at the west end of Haas Rd northwest of Shirland and structures at Sugar Shores Camping Resort may be threatened. Hwy T, Beloit Newark Rd and Sugar River Park are flooded. Widespread inundation of the floodplain may reach over 1 mile from the river between Durand and Shirland.
12	Hwy T, Beloit Newark Rd and Sugar River Park are flooded. In Illinois, Yale Bridge Rd may be threatened west of the river northwest of Shirland. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland.
9.1	This level is the 20 percent chance flood, meaning a 20 percent chance in any given year of the river reaching this level. There is widespread flooding of lowland in the Brodhead area. In the Avon Bottoms area of Rock County, there is flooding in Sugar River Park and Beloit Newark Rd. Floodwaters are over Highway T in Rock County. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated.
8.8	There is widespread agricultural land flooding in the Brodhead area. Downstream in the Avon Bottoms area of Rock County, there is flooding in Sugar River Park and Beloit Newark Rd. Floodwaters are over Highway T in Rock County. Structures at Sugar Shores Camping Resort may be threatened. Winslow Rd is threatened near the river between Durand and Shirland.
8	Floodwaters are over Highway T in Rock County and Beloit Newark Rd, and there is flooding in Sugar River Park in the Avon Bottoms area of Rock County. There is widespread agricultural and lowland flooding in the Brodhead area. In Illinois, structures at Sugar Shores Camping Resort may be threatened. Winslow Rd is threatened near the river between Durand and Shirland.
7.6	A stage of 7.4 feet can be considered to be about a 50 percent chance flood meaning there is a 50 percent chance in any given year of the river reaching this level. There is widespread agricultural and lowland flooding in the Brodhead area. Downstream in the Avon Bottoms area of Rock County, there is flooding in Sugar River Park and Beloit Newark Rd. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated.
7	Some roads are flooded about 6 miles downstream in Avon Township of Rock County, including Beloit Newark Rd. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated.
6.5	There is widespread flooding of lowland and agricultural land. Downstream in the Avon Bottoms area of Rock County, there is flooding in Sugar River Park. Some roads are flooded in Avon Township,including Beloit Newark Rd, about 6 miles downstream of Brodhead. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated.
6	Some roads are flooded about 6 miles downstream in Avon Township of Rock County, including Beloit Newark Rd. In the Avon Bottoms area of Rock County, flooding is occurring in Sugar River Park. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated.
5.5	Some roads are flooded about 6 miles downstream in Avon Township in Rock County. In the Avon Bottoms area of Rock County, flooding is occurring in Sugar River Park.
5	Some roads become flooded about 6 miles downstream in Avon Township in Rock County. In the Avon Bottoms area of Rock County, some minor flooding develops in Sugar River Park, including the boat ramp.
4.5	In Illinois, low-lying areas in the Sugar River Forest Preserve and Colored Sands Forest Preserve may be inundated.

About This Location

Latitude: 42.612222° N, Longitude: 89.398056° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	5 ft	Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum	Elevation (gauge height = 0)	Elevation (gauge height = flood stage)	Elevation information source
NAVD88	767.88 ft	772.88 ft	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	768.14 ft	773.14 ft	Older USGS topographic maps, NGVD29 benchmarks
MSL	Not Available	Not Available	Older USGS topographic maps, MSL benchmarks
Other	Not Available	Not Available

Current/Historical Observations:

U.S. Geological Survey (USGS) Data and Site Info for Brodhead

Additional Information

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How low could the river get?

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Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

NWS Information

National Weather Service
Milwaukee/Sullivan Weather Forecast Office
N3533 Hardscrabble Road
Dousman, WI 53118
(262) 965-2074
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Page last modified: 2-Nov-2020 7:29 PM

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