Flood ImpactsIf you notice any errors in the below information, please contact our Webmaster
13.3
There is widespread flooding in the Afton and Janesville areas. Numerous roads are closed including South River Road on the south side of Janesville, Joseph and Charles Streets and the on-ramp to Memorial Drive. The intersection of Wall Street and Main Street is closed. Traxler Park in Janesville is flooded and closed. This level is the 1 percent chance flood meaning there is a 1 percent chance of the river reaching this level in any given year.
13
This level is the 2 percent chance flood meaning there is a 2 percent chance in any given year of the river reaching this level. There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets are closed including South River Road on the south side of Janesville and several blocks of Joseph and Charles Streets. The intersection of Wall Street and Main Street is closed. Traxler Park in Janesville is flooded and closed.
12.9
There is widespread flooding in the Afton and Janesville areas. Numerous roads are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed. The intersection of Wall Street and Main Street is closed. Traxler Park in Janesville is flooded and closed.
12.4
This level is about a 4 percent chance flood meaning there is a 4 percent chance in any given year of the river reaching this level. There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, a portion of Main Street, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed. Traxler Park in Janesville is flooded and closed.
12.2
There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets adjacent to the river are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, a portion of Main Street, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed as is a portion of Riverside Drive. Traxler Park off of Memorial Drive in Janesville is flooded and closed.
11.5
Water surrounds at least 2 homes near the river in the Afton area. Numerous secondary roads in the Afton area are closed to traffic. Floodwaters affect South River Road on the south side of Janesville. Traxler Park off of Memorial Drive in Janesville is flooded.
11.1
Floodwaters affect Riverside Park and South River Road in Janesville and there is widespread lowland and agricultural land flooding in the Afton and Janesville areas. This level is the 10 percent flood meaning that there is a 10 percent chance of the river reaching this level in any given year.
10.7
Floodwaters affect a road in Riverside Park on the north side of Janesville and South River Road on the south side of Janesville. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas.
10.5
Floodwaters affect Riverside Park on the north side of Janesville and South River Road on the south side of Janesville. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas.
10.4
Floodwaters affect low spots on South River Road on the south side of Janesville. Floodwaters affect a home on South Christian Road on the east side of the river in the Afton area. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas.
10.1
Floodwaters affect the property of a home on South Christian Road on the east side of the river in the Afton area. Minor erosional flood damage occurs to lowland and agricultural land adjacent to the river the Afton and Janesville areas. This level is the 20 percent chance flood meaning that there is a 20 percent chance in any given year of the river reaching this level.
9.1
Floodwaters affect property of a home on South Christian Road on the east side of the river in the Afton area. There is minor erosional flood damage to lowland and agricultural land in the Afton and Janesville areas.
9
Minor erosional flood damge occurs to lowland and agricultural land adjacent to the river in the Afton and Janesville areas.
8.8
Floodwaters affect lowland and agricultural land adjacent to the river in the Afton and Janesville areas. This level is about a 50 percent chance flood meaning that there is a 50 percent chance in any given year of the river reaching this level.
8.5
Floodwaters spread into lowland and agricultural land adjacent to the river in the Afton and Janesville areas.
8
Water overflows the lower river banks in the Afton and Janesville areas. The river width is about 240 feet in the area of the gauge.
Flood Categories (in feet)
| Major Flood Stage: |
12.2 |
| Moderate Flood Stage: |
11.1 |
| Flood Stage: |
9 |
| Action Stage: |
8 |
| Low Stage (in feet): |
-9999 |
Historic Crests
(1) 13.51 ft on 06/21/2008
(2) 13.05 ft on 02/05/1916
(3) 12.21 ft on 01/23/2008
(4) 11.86 ft on 04/05/1979
(5) 11.84 ft on 04/18/2013
(6) 11.84 ft on 10/18/2015
(7) 11.80 ft on 03/23/1929
(8) 11.77 ft on 04/10/1959
(9) 11.50 ft on 03/25/1918
(10) 11.41 ft on 04/23/1993
Show More Historic Crests
(P): Preliminary values subject to further review.
Recent Crests
(1) 9.10 ft on 04/10/2024
(P)
(2) 7.27 ft on 04/13/2022
(3) 7.43 ft on 03/18/2021
(4) 9.36 ft on 03/29/2020
(5) 10.48 ft on 10/15/2019
(6) 11.07 ft on 03/25/2019
(7) 9.86 ft on 01/26/2019
(8) 11.20 ft on 09/12/2018
(9) 9.79 ft on 05/21/2018
(10) 9.29 ft on 03/01/2018
Show More Recent Crests
(P): Preliminary values subject to further review.
Low Water Records (1) 0.09 ft on 08/26/1934
(2) 1.89 ft on 09/20/2012
(3) 2.02 ft on 07/15/2012
(4) 2.28 ft on 09/07/2003
(5) 2.44 ft on 09/20/2005
Show More Low Water Records 
weather.gov 
