Skip Navigation Link weather.gov  
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
Bookmark and Share Navigation Bar End Cap

  
 
Hydrograph River at a Glance Download
Little Sioux River near Montgomery Stage (ft)Observed: 1386.25 ft at 6:00PM Jan 17, 2021Observed: 1386.27 ft at 7:00PM Jan 17, 2021Observed: 1386.26 ft at 8:00PM Jan 17, 2021Observed: 1386.26 ft at 9:00PM Jan 17, 2021Observed: 1386.24 ft at 10:00PM Jan 17, 2021Observed: 1386.23 ft at 11:00PM Jan 17, 2021Observed: 1386.24 ft at 12:00AM Jan 18, 2021Observed: 1386.27 ft at 1:00AM Jan 18, 2021Observed: 1386.25 ft at 2:00AM Jan 18, 2021Observed: 1386.23 ft at 3:00AM Jan 18, 2021Observed: 1386.22 ft at 4:00AM Jan 18, 2021Observed: 1386.24 ft at 5:00AM Jan 18, 2021Observed: 1386.24 ft at 6:00AM Jan 18, 2021Observed: 1386.23 ft at 7:00AM Jan 18, 2021Observed: 1386.23 ft at 8:00AM Jan 18, 2021Observed: 1386.26 ft at 9:00AM Jan 18, 2021Observed: 1386.1 ft at 10:00AM Jan 18, 2021Observed: 1386.08 ft at 11:00AM Jan 18, 2021Observed: 1386.04 ft at 12:00PM Jan 18, 2021Observed: 1386.06 ft at 1:00PM Jan 18, 2021Observed: 1386.1 ft at 2:00PM Jan 18, 2021Observed: 1385.99 ft at 3:00PM Jan 18, 2021Observed: 1386.03 ft at 4:00PM Jan 18, 2021Observed: 1386.15 ft at 5:00PM Jan 18, 2021Observed: 1386.2 ft at 6:00PM Jan 18, 2021Observed: 1386.23 ft at 7:00PM Jan 18, 2021Observed: 1386.24 ft at 8:00PM Jan 18, 2021Observed: 1386.27 ft at 9:00PM Jan 18, 2021Observed: 1386.28 ft at 10:00PM Jan 18, 2021Observed: 1386.28 ft at 11:00PM Jan 18, 2021Observed: 1386.28 ft at 12:00AM Jan 19, 2021Highest Observation: 1386.29 ft at 1:00AM Jan 19, 2021Observed: 1386.24 ft at 2:00AM Jan 19, 2021Observed: 1386.25 ft at 3:00AM Jan 19, 2021Observed: 1386.25 ft at 4:00AM Jan 19, 2021Observed: 1386.26 ft at 5:00AM Jan 19, 2021Observed: 1386.27 ft at 6:00AM Jan 19, 2021Observed: 1386.27 ft at 7:00AM Jan 19, 2021Observed: 1386.27 ft at 8:00AM Jan 19, 2021Observed: 1386.2 ft at 9:00AM Jan 19, 2021Observed: 1386.22 ft at 10:00AM Jan 19, 2021Observed: 1386.16 ft at 11:00AM Jan 19, 2021Observed: 1386.13 ft at 12:00PM Jan 19, 2021Observed: 1386.08 ft at 1:00PM Jan 19, 2021Observed: 1386.07 ft at 2:00PM Jan 19, 2021Observed: 1386.1 ft at 3:00PM Jan 19, 2021Observed: 1386.08 ft at 4:00PM Jan 19, 2021Observed: 1386.12 ft at 5:00PM Jan 19, 2021Observed: 1386.1 ft at 6:00PM Jan 19, 2021Observed: 1386.14 ft at 7:00PM Jan 19, 2021Observed: 1386.18 ft at 8:00PM Jan 19, 2021Observed: 1386.18 ft at 9:00PM Jan 19, 2021Observed: 1386.14 ft at 10:00PM Jan 19, 2021Observed: 1386.15 ft at 11:00PM Jan 19, 2021Observed: 1386.19 ft at 12:00AM Jan 20, 2021Observed: 1386.17 ft at 1:00AM Jan 20, 2021Observed: 1386.18 ft at 2:00AM Jan 20, 2021Observed: 1386.19 ft at 3:00AM Jan 20, 2021Observed: 1386.2 ft at 4:00AM Jan 20, 2021Observed: 1386.21 ft at 5:00AM Jan 20, 2021Observed: 1386.21 ft at 6:00AM Jan 20, 2021Observed: 1386.21 ft at 7:00AM Jan 20, 2021Observed: 1386.21 ft at 8:00AM Jan 20, 2021Observed: 1386.18 ft at 9:00AM Jan 20, 2021Observed: 1386.14 ft at 10:00AM Jan 20, 2021Observed: 1386.12 ft at 11:00AM Jan 20, 2021Observed: 1386.08 ft at 12:00PM Jan 20, 2021Observed: 1386.05 ft at 1:00PM Jan 20, 2021Observed: 1386 ft at 2:00PM Jan 20, 2021Observed: 1385.94 ft at 3:00PM Jan 20, 2021Observed: 1386.07 ft at 4:00PM Jan 20, 2021Observed: 1386.16 ft at 5:00PM Jan 20, 2021Observed: 1386.15 ft at 6:00PM Jan 20, 2021Observed: 1386.17 ft at 7:00PM Jan 20, 2021Observed: 1386.15 ft at 8:00PM Jan 20, 2021Observed: 1386.16 ft at 9:00PM Jan 20, 2021Observed: 1386.16 ft at 10:00PM Jan 20, 2021Observed: 1386.16 ft at 11:00PM Jan 20, 2021Observed: 1386.15 ft at 12:00AM Jan 21, 2021Observed: 1386.17 ft at 1:00AM Jan 21, 2021Observed: 1386.16 ft at 2:00AM Jan 21, 2021Observed: 1386.15 ft at 3:00AM Jan 21, 2021Observed: 1386.17 ft at 4:00AM Jan 21, 2021Observed: 1386.16 ft at 5:00AM Jan 21, 2021Observed: 1386.16 ft at 6:00AM Jan 21, 2021Observed: 1386.16 ft at 7:00AM Jan 21, 2021Observed: 1386.14 ft at 8:00AM Jan 21, 2021Observed: 1386.03 ft at 9:00AM Jan 21, 2021Observed: 1385.96 ft at 10:00AM Jan 21, 2021Observed: 1385.93 ft at 11:00AM Jan 21, 2021Observed: 1385.89 ft at 12:00PM Jan 21, 2021Observed: 1385.91 ft at 1:00PM Jan 21, 2021Observed: 1385.98 ft at 2:00PM Jan 21, 2021Observed: 1386.04 ft at 3:00PM Jan 21, 2021Observed: 1386.02 ft at 4:00PM Jan 21, 2021Observed: 1386.07 ft at 5:00PM Jan 21, 2021Observed: 1386.09 ft at 6:00PM Jan 21, 2021Observed: 1386.08 ft at 7:00PM Jan 21, 2021Observed: 1386.07 ft at 8:00PM Jan 21, 2021Observed: 1386.07 ft at 9:00PM Jan 21, 2021Observed: 1386.06 ft at 10:00PM Jan 21, 2021Observed: 1386.06 ft at 11:00PM Jan 21, 2021Observed: 1386.05 ft at 12:00AM Jan 22, 2021Observed: 1386.05 ft at 1:00AM Jan 22, 2021Observed: 1386.04 ft at 2:00AM Jan 22, 2021Observed: 1386.05 ft at 3:00AM Jan 22, 2021Observed: 1386.04 ft at 4:00AM Jan 22, 2021Observed: 1386.03 ft at 5:00AM Jan 22, 2021Observed: 1386.04 ft at 6:00AM Jan 22, 2021Observed: 1386.02 ft at 7:00AM Jan 22, 2021Observed: 1385.99 ft at 8:00AM Jan 22, 2021Observed: 1385.91 ft at 9:00AM Jan 22, 2021Observed: 1385.86 ft at 10:00AM Jan 22, 2021Observed: 1385.77 ft at 11:00AM Jan 22, 2021Observed: 1385.74 ft at 12:00PM Jan 22, 2021Observed: 1385.71 ft at 1:00PM Jan 22, 2021Observed: 1385.73 ft at 2:00PM Jan 22, 2021Observed: 1385.78 ft at 3:00PM Jan 22, 2021Observed: 1385.82 ft at 4:00PM Jan 22, 2021Observed: 1385.86 ft at 5:00PM Jan 22, 2021Observed: 1385.9 ft at 6:00PM Jan 22, 2021Observed: 1385.97 ft at 7:00PM Jan 22, 2021Observed: 1386.02 ft at 8:00PM Jan 22, 2021Observed: 1386.01 ft at 9:00PM Jan 22, 2021Observed: 1386.02 ft at 10:00PM Jan 22, 2021Observed: 1385.96 ft at 11:00PM Jan 22, 2021Observed: 1385.98 ft at 12:00AM Jan 23, 2021Observed: 1385.98 ft at 1:00AM Jan 23, 2021Observed: 1385.96 ft at 2:00AM Jan 23, 2021Observed: 1385.98 ft at 3:00AM Jan 23, 2021Observed: 1386.01 ft at 4:00AM Jan 23, 2021Observed: 1386 ft at 5:00AM Jan 23, 2021Observed: 1386 ft at 6:00AM Jan 23, 2021Observed: 1386 ft at 7:00AM Jan 23, 2021Observed: 1385.99 ft at 8:00AM Jan 23, 2021Observed: 1385.99 ft at 9:00AM Jan 23, 2021Observed: 1385.98 ft at 10:00AM Jan 23, 2021Observed: 1385.95 ft at 11:00AM Jan 23, 2021Observed: 1385.94 ft at 12:00PM Jan 23, 2021Observed: 1385.98 ft at 1:00PM Jan 23, 2021Observed: 1385.9 ft at 2:00PM Jan 23, 2021Observed: 1385.92 ft at 3:00PM Jan 23, 2021Observed: 1385.94 ft at 4:00PM Jan 23, 2021Observed: 1385.94 ft at 5:00PM Jan 23, 2021Observed: 1385.96 ft at 6:00PM Jan 23, 2021Observed: 1386 ft at 7:00PM Jan 23, 2021Observed: 1385.99 ft at 8:00PM Jan 23, 2021Observed: 1386.03 ft at 9:00PM Jan 23, 2021Observed: 1386.04 ft at 10:00PM Jan 23, 2021Observed: 1386.07 ft at 11:00PM Jan 23, 2021Observed: 1386.08 ft at 12:00AM Jan 24, 2021Observed: 1386.07 ft at 1:00AM Jan 24, 2021Observed: 1386.07 ft at 2:00AM Jan 24, 2021Observed: 1386.06 ft at 3:00AM Jan 24, 2021Observed: 1386.05 ft at 4:00AM Jan 24, 2021Observed: 1386.05 ft at 5:00AM Jan 24, 2021Observed: 1386 ft at 7:00AM Jan 24, 2021Observed: 1386.04 ft at 8:00AM Jan 24, 2021Observed: 1386.04 ft at 9:00AM Jan 24, 2021Observed: 1386.01 ft at 10:00AM Jan 24, 2021Observed: 1385.98 ft at 11:00AM Jan 24, 2021Observed: 1385.95 ft at 12:00PM Jan 24, 2021Observed: 1385.92 ft at 1:00PM Jan 24, 2021Observed: 1385.92 ft at 2:00PM Jan 24, 2021Observed: 1385.92 ft at 3:00PM Jan 24, 2021Observed: 1385.94 ft at 4:00PM Jan 24, 2021Observed: 1385.98 ft at 5:00PM Jan 24, 2021Observed: 1385.94 ft at 6:00PM Jan 24, 2021Observed: 1385.9 ft at 7:00PM Jan 24, 2021Observed: 1385.96 ft at 8:00PM Jan 24, 2021Observed: 1386 ft at 9:00PM Jan 24, 2021Observed: 1385.98 ft at 10:00PM Jan 24, 2021Observed: 1385.96 ft at 11:00PM Jan 24, 2021Observed: 1385.95 ft at 12:00AM Jan 25, 2021Observed: 1385.95 ft at 1:00AM Jan 25, 2021Observed: 1385.98 ft at 2:00AM Jan 25, 2021Observed: 1385.98 ft at 3:00AM Jan 25, 2021Observed: 1385.96 ft at 4:00AM Jan 25, 2021Observed: 1385.96 ft at 5:00AM Jan 25, 2021Observed: 1386 ft at 6:00AM Jan 25, 2021Observed: 1386.03 ft at 7:00AM Jan 25, 2021Observed: 1386 ft at 8:00AM Jan 25, 2021Observed: 1385.98 ft at 9:00AM Jan 25, 2021Observed: 1385.95 ft at 10:00AM Jan 25, 2021Observed: 1385.92 ft at 11:00AM Jan 25, 2021Observed: 1385.92 ft at 12:00PM Jan 25, 2021Observed: 1385.91 ft at 1:00PM Jan 25, 2021Observed: 1385.9 ft at 2:00PM Jan 25, 2021Observed: 1385.89 ft at 3:00PM Jan 25, 2021Observed: 1385.93 ft at 4:00PM Jan 25, 2021Observed: 1385.95 ft at 5:00PM Jan 25, 2021Observed: 1385.96 ft at 6:00PM Jan 25, 2021Observed: 1385.97 ft at 7:00PM Jan 25, 2021Observed: 1385.97 ft at 8:00PM Jan 25, 2021Observed: 1385.98 ft at 9:00PM Jan 25, 2021Observed: 1385.98 ft at 10:00PM Jan 25, 2021Observed: 1385.98 ft at 11:00PM Jan 25, 2021Observed: 1385.97 ft at 12:00AM Jan 26, 2021Observed: 1385.96 ft at 1:00AM Jan 26, 2021Observed: 1385.94 ft at 2:00AM Jan 26, 2021Observed: 1385.95 ft at 3:00AM Jan 26, 2021Observed: 1385.94 ft at 4:00AM Jan 26, 2021Observed: 1385.89 ft at 5:00AM Jan 26, 2021Observed: 1385.92 ft at 6:00AM Jan 26, 2021Observed: 1385.92 ft at 7:00AM Jan 26, 2021Observed: 1385.89 ft at 8:00AM Jan 26, 2021Observed: 1385.89 ft at 9:00AM Jan 26, 2021Observed: 1385.82 ft at 10:00AM Jan 26, 2021Observed: 1385.81 ft at 11:00AM Jan 26, 2021Observed: 1385.77 ft at 12:00PM Jan 26, 2021Observed: 1385.75 ft at 1:00PM Jan 26, 2021Observed: 1385.68 ft at 2:00PM Jan 26, 2021Observed: 1385.64 ft at 3:00PM Jan 26, 2021Observed: 1385.71 ft at 4:00PM Jan 26, 2021Observed: 1385.81 ft at 5:00PM Jan 26, 2021Observed: 1385.81 ft at 6:00PM Jan 26, 2021Observed: 1385.81 ft at 7:00PM Jan 26, 2021Observed: 1385.87 ft at 8:00PM Jan 26, 2021Observed: 1385.85 ft at 9:00PM Jan 26, 2021Observed: 1385.83 ft at 10:00PM Jan 26, 2021Observed: 1385.82 ft at 11:00PM Jan 26, 2021Observed: 1385.88 ft at 12:00AM Jan 27, 2021Observed: 1385.86 ft at 1:00AM Jan 27, 2021Observed: 1385.86 ft at 2:00AM Jan 27, 2021Iowa Flood CenterMLSI4(plotting HGIRP) Graph Created (2:34AM Jan 27, 2021)ObservedLatest observed value: 1385.86 ft at 2:00 AM CST 27-Jan-2021. Flood Stage is 1391 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (CST)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: No forecasts are available for this location

NOTE: Gauge reading may be affected by ice.

NOTE: Graphical forecasts are not available for the Little Sioux River near Montgomery. During times of high water, forecast crest information can be found in the text products.

Return to Area Map
Downstream Gauge Downstream Gauge - near Milford
Flood Categories (in feet)
Major Flood Stage: 1394.5
Moderate Flood Stage: 1393
Flood Stage: 1391
Action Stage: 1390
Low Stage (in feet): -9999

Historic Crests
(1) 1,394.90 ft on 06/24/2018
(2) 1,394.32 ft on 03/16/2019
(3) 1,390.13 ft on 04/15/2018

(P): Preliminary values subject to further review.

Recent Crests
(1) 1,394.32 ft on 03/16/2019
(2) 1,394.90 ft on 06/24/2018
(3) 1,390.13 ft on 04/15/2018

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
Disclaimer
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
1397 the bridge on 140th Street west of Montgomery is overtopped.
1396.5 140th Street west of Montgomery begins to flood.
1395 190th Avenue south of the MN/IA State Line begins to flood, and the bridge on 170th Avenue north of Highway 9 is overtopped. Water also reaches the bottom of the bridge on 140th Street west of Montgomery.
1394.5 Highway 9 east of the Little Sioux River bridge is flooded in two lower spots.
1393 water begins to flood 190th Avenue north of Montgomery.
1391.5 170th Avenue north of Highway 9 begins to flood.
1391 crop and pasture land begin to flood.
Photos
(1) upstream view
(2) at gage
(3) downstream view
About This Location Collapse

Latitude: 43.459518° N, Longitude: 95.230817° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 1391 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
Elevation
(gauge height = flood stage)
Elevation information source
NAVD88 0.00 1391.00 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
Resources Collapse
Hydrologic Resources Additional Resources
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
Sioux Falls Weather Forecast Office
26 Weather Lane
Sioux Falls, SD 57104-0198
(605) 330-4247
Ask Questions/Webmaster
Page last modified: 30-Oct-2020 4:09 PM
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities