Winnebago River at Mason City
Cerro Gordo County, Iowa
The past week
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What floods at each level
- 20.5 ft
Water affects the floodwall at the water treatment plant located at 13th St NE.
- 17.4 ft
Water reaches bottom of railroad bridge east of Kentucky Ave bridge.
- 15 ft
This is the approximate top of levee protection. Levees run from the 12th St NE bridge to 9th St along the east bank and also from 8th St to 6th St and Hampshire St.
- 14 ft
Water may flow over the city dikes.
- 12 ft
Widespread flooding occurs along the river. Some backwater effects are possible along Willow Creek between downtown Mason City and the confluence with the Winnebago river.
- 11 ft
Sandbagging occurs on the dike from 12th St NE to Carolina St.
- 10 ft
Widespread flooding occurs at city parks. Water reaches the underside of the 12th St NE bridge at the piers.
- 8 ft
Water affects east and west city parks in the 12th St NE area.
- 7 ft
Water affects low-lying areas along the river.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Jun 7, 2008 | 18.74 ft | 13,100 cfs |
| Mar 29, 1933 | 15.7 ft | 10,800 cfs |
| Mar 26, 1961 | 14.8 ft | 10,500 cfs |
Flood map
See which streets and areas flood at each water level here. Open the flood map ↗
More on Winnebago River
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