Skip Navigation Link  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Navigation Bar End Cap


This probabilistic forecast is issued by the North Central River Forecast Center.
tab left off Hydrograph tab right off tab left off River at a Glance tab right off tab left off Download tab right off tab left on tab right on
About this graph
Forecasts for the Iowa River at Marshalltown are issued routinely during the warm season, and as needed at other times of the year.

More information on datums is available at

Return to Area Map

Downstream Gauge Downstream Gauge - near Tama Hwy E49
Zoom Level:13
Flood Categories (in feet)
Major Flood Stage: 26
Moderate Flood Stage: 23
Flood Stage: 19
Action Stage: 14
Low Stage (in feet): -9999

Historic Crests
(1) 22.25 ft on 07/02/2014
(2) 22.08 ft on 05/30/2013
(3) 21.79 ft on 06/13/2008
(4) 20.77 ft on 08/17/1993
(5) 20.38 ft on 06/18/1990
(6) 20.38 ft on 12/15/2015
(7) 20.32 ft on 03/15/2019
(8) 20.13 ft on 06/24/2007
(9) 19.99 ft on 08/30/2015
(10) 19.97 ft on 06/05/1991
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 13.22 ft on 03/07/2021
(2) 0.00 ft on 03/06/2021
(3) 18.21 ft on 06/23/2020
(4) 20.32 ft on 03/15/2019
(5) 18.25 ft on 09/27/2018
(6) 17.63 ft on 10/01/2016
(7) 20.38 ft on 12/15/2015
(8) 19.99 ft on 08/30/2015
(9) 22.25 ft on 07/02/2014
(10) 22.08 ft on 05/30/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
KML Image
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
26 Water reaches the top of the earthen levee along the river at Iowa 14.
22 Water reaches the low beams of the Iowa 14 bridge.
21.5 Water affects several roads east of Marshalltown...including U.S. 30...East Main Street Road and Zeller Avenue.
21.4 Water covers both lanes of Iowa 14 north of Marshalltown.
21.2 Water covers several gravel roads north and northwest of Marshalltown...including Stanley Mill Road...North Center Street...Oaks Avenue and Prairie Avenue.
21 Iowa 330 south of Albion...near Timmons Grove closed. Most of Timmons Grove County Park floods.
20.5 In of Marsh Avenue...Stanley Mill Road and 160th Street flood. Iowa 330 is threatened near the Linn Creek overpass which is located west of Marshalltown about 2 miles northeast of the US 30 junction.
20 Water approaches the top of the concrete bridge piers of the Iowa 14 bridge.
19.5 The southbound lanes of Iowa 14 flood. Iowa 330 south of Albion floods.
19 Water affects Iowa 14 north of the river as well as Iowa 330 south of Albion.
18 Widespread agricultural and lowland flooding occur along Iowa 330 south of Albion.
17 Roads within Timmons Grove County Park are threatened as is the bicycle path along 18th Avenue in Marshalltown.
16.5 The underside of the primary concrete support span of Iowa 14 is affected.
16 The access road serving north portions of Timmons Grove County Park floods.
15 Water approaches the bridge crossing from the County Three Bridges Road east of Marshalltown. Water affects agricultural land.
14 There is lowland flooding north of town near Iowa 14.

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
  • USGS 7-Day Streamflow Duration Hydrograph for this location:
    Duration Hydrograph

    Duration Hydrograph Legend

  • USGS Cumulative Streamflow Hydrograph for this location:
    Duration Hydrograph of Cumulative Streamflow
Collaborative Agencies Collapse
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
Des Moines Weather Forecast Office
9607 NW Beaver Dr.
Des Moines, IA 50131
(515) 270-2614
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:29 PM
Privacy Policy
About Us
Career Opportunities