Sugar River at Brodhead, WI

The last 7 days and the forecast

NWS forecast issued Thu, Sep 24, 8:50 AM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

What floods at each level

From the National Weather Service, highest first.

• 13 ftIn 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, S Hopkins 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 ftHwy T, Beloit Newark Rd, S Hopkins 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 ftThere 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 ftThere 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, Beloit Newark Rd, S Nelson Rd, and S Hopkins 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 ftFloodwaters are over Highway T, Beloit Newark Rd, S Nelson Rd, S Hopkins 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.
• 7.5 ftThere 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, Beloit Newark Rd and S Hopkins Rd. Water flows over the road on both sides of the S Nelson Rd bridge. 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 ftSome roads are flooded about 6 miles downstream in Avon Township of Rock County, including Beloit Newark Rd. Water over the road on both sides of the S Nelson Rd bridge. 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 ftThere 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. Water over the road on both sides of the S Nelson Rd bridge. 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 ftSome 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. Water over the road on both sides of the S Nelson Rd bridge. 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 ftSome 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 ftSome 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 ftIn Illinois, low-lying areas in the Sugar River Forest Preserve and Colored Sands Forest Preserve may be inundated.

Highest crests on record

1. 11.4 ft — September 13, 1915
2. 10.2 ft — March 15, 2019
3. 10.07 ft — March 5, 1937
4. 10 ft — March 14, 1929
5. 9.9 ft — February 6, 1938

Recent crests: 8.26 ft (April 18, 2026) · 7.72 ft (July 16, 2024) · 6.39 ft (April 5, 2024) · 5.18 ft (March 2, 2023) · 3.89 ft (September 13, 2022)

Up and down the river, and nearby

• Pecatonica River near Shirland, IL
• Rock River at Afton, WI
• Yahara River at Fulton, WI
• Rock River at Rockton, IL
• Pecatonica River at Martintown, WI
• Rock River at Latham Park, IL
• Pecatonica River at Freeport, IL
• Rock River at Newville, WI