21' - The levees protecting Sioux Falls are overtopped resulting in significant to catastrophic flooding.
19.5' - Levees downstream on diversion channel will be overtopped if all flow of around 37000 cfs is being diverted, potentially resulting in flooding in and around the airport in Sioux Falls.
18.5' - 60th Street north of the Sioux Falls airport begins to flood.
17' - Flooding begins to affect roads, homes, and businesses in Renner.
15' - Some farm buildings between Renner and Sioux Falls are threatened by high water.
13' - Ditch Rd at the gauge location is flooded.
12' - Some agricultural land between 60th Street North and Interstate 90 begins to flood.
11' - Minor flooding of some ditches upstream of Sioux Falls begins.