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This probabilistic forecast is issued by the North Central River Forecast Center.
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About this graph
Forecasts for the Iowa River at Marengo are issued as needed during times of high water, but are not routinely available.
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Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 19
Moderate Flood Stage: 17
Flood Stage: 15
Action Stage: 13
Low Stage (in feet): -9999

Historic Crests
(1) 21.38 ft on 06/12/2008
(2) 20.36 ft on 05/31/2013
(3) 20.31 ft on 07/19/1993
(4) 20.26 ft on 07/12/1993
(5) 19.96 ft on 07/02/2014
(6) 19.79 ft on 07/12/1969
(7) 19.57 ft on 08/19/1993
(8) 19.40 ft on 03/19/1979
(9) 19.21 ft on 03/31/1960
(10) 19.14 ft on 09/06/2018
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 17.93 ft on 06/25/2020
(2) 17.59 ft on 06/11/2020
(3) 18.44 ft on 05/29/2019
(4) 18.83 ft on 03/17/2019
(5) 18.76 ft on 10/10/2018
(6) 19.14 ft on 09/06/2018
(7) 17.95 ft on 01/20/2017
(8) 16.90 ft on 10/04/2016
(9) 18.31 ft on 12/18/2015
(10) 17.09 ft on 06/25/2015
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
24.5 Water reaches the top of the levee at the invert at Highway V66.
23.7 Water reaches the top of the levee invert on the west side of Marengo.
22 Water approaches the top of the levee on the south bank at Marengo.
20.9 Water reaches the bottom of the Highway V66 bridge.
19.5 Water affects the Whirlpool Corporation parking lot and southeast exterior of the plant in Middle Amana.
19 Major Flood Stage. Homes west of Marengo are affected by floodwaters. Significant flooding of agricultural land.
18 Water breaches the mill race dikes near Middle Amana.
17 Moderate Flood Stage. Extensive inundation of agricultural land.
16 Flood Stage. Water affects agricultural land along the river. Water is several feet deep in places.
15 Water reaches the bottom of the levee surrounding Marengo. Water affects low lying agricultural land along the river
14 Low lying agricultural land and pastureland along the river upstream of Marengo is affected.
11 Water affects the lowest agricultural land along the river.

Other Real-time and/or Archive Data Sources:

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How low could the river get?
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Quad Cities Weather Forecast Office
9040 N Harrison Street
Davenport, IA 52806-7326
(563) 386-3976
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Page last modified: 2-Nov-2020 7:29 PM
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