14' - There is widespread flooding of lakeside homes and roads in the Lake Koshkonong area including Vets Lane, Blackhawk Island Road and Oxbow Bend Road.
13' - There is widespread flooding of lakeside homes and roads in the Lake Koshkonong area including Vets Lane, Blackhawk Island Road and Oxbow Bend Road.
12' - There is widespread flooding of lakeside homes and roads in the Lake Koshkonong area including Vets Lane, Blackhawk Island Road and Oxbow Bend Road.
11.3' - There is knee-deep water over Blackhawk Island Road. Lamp Road on west side of river also becomes flooded. Lake Koshkonong merges with Mud Lake to the east of Lake Koshkonong.
11' - In the Town of Lake Koshkonong, floodwaters affect Vets Lane, Blackhawk Island Road, and Oxbow Bend Road. There is widespread flooding of roads and docks in the Town of Koshkonong and Town of Sumner including Vets Lane, Blackhawk Island Road and Oxbow Bend Road.
10.5' - Floodwaters reach Oxbow Bend Road in the area of the gage on the east side of the lake.
10' - Floodwaters affect homes and boat docks in the Blackhawk Island area of Lake Koshkonong on the north side of the lake. Floodwaters spread over low spots on Blackhawk Island Road in the area where the Rock River enters the lake.
9.5' - Water is into low lying areas along Lake Koshkonong.
9' - Water spreads into low lying areas along Lake Koshkonong.