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Hydrograph River at a Glance Download
Big Sioux River near Florence Stage (ft)Flow (cfs)Observed: 2.15 ft at 12:01PM Oct 27, 2020Observed: 2.15 ft at 12:15PM Oct 27, 2020Observed: 2.15 ft at 12:16PM Oct 27, 2020Observed: 2.15 ft at 12:30PM Oct 27, 2020Observed: 2.15 ft at 12:45PM Oct 27, 2020Observed: 2.16 ft at 1:00PM Oct 27, 2020Observed: 2.16 ft at 1:15PM Oct 27, 2020Observed: 2.16 ft at 1:30PM Oct 27, 2020Observed: 2.16 ft at 1:45PM Oct 27, 2020Observed: 2.16 ft at 2:00PM Oct 27, 2020Observed: 2.16 ft at 2:15PM Oct 27, 2020Observed: 2.16 ft at 2:30PM Oct 27, 2020Observed: 2.16 ft at 2:45PM Oct 27, 2020Observed: 2.17 ft at 3:00PM Oct 27, 2020Observed: 2.16 ft at 3:15PM Oct 27, 2020Observed: 2.17 ft at 3:30PM Oct 27, 2020Observed: 2.17 ft at 3:45PM Oct 27, 2020Observed: 2.17 ft at 4:00PM Oct 27, 2020Observed: 2.17 ft at 4:15PM Oct 27, 2020Observed: 2.17 ft at 4:30PM Oct 27, 2020Observed: 2.17 ft at 4:45PM Oct 27, 2020Observed: 2.17 ft at 5:00PM Oct 27, 2020Observed: 2.17 ft at 5:15PM Oct 27, 2020Observed: 2.17 ft at 5:30PM Oct 27, 2020Observed: 2.17 ft at 5:45PM Oct 27, 2020Observed: 2.17 ft at 6:00PM Oct 27, 2020Observed: 2.17 ft at 6:15PM Oct 27, 2020Observed: 2.17 ft at 6:30PM Oct 27, 2020Observed: 2.17 ft at 6:45PM Oct 27, 2020Observed: 2.17 ft at 7:00PM Oct 27, 2020Observed: 2.17 ft at 7:15PM Oct 27, 2020Observed: 2.17 ft at 7:30PM Oct 27, 2020Observed: 2.16 ft at 7:45PM Oct 27, 2020Observed: 2.17 ft at 8:00PM Oct 27, 2020Observed: 2.16 ft at 8:15PM Oct 27, 2020Observed: 2.16 ft at 8:30PM Oct 27, 2020Observed: 2.17 ft at 8:45PM Oct 27, 2020Observed: 2.16 ft at 9:00PM Oct 27, 2020Observed: 2.17 ft at 9:15PM Oct 27, 2020Observed: 2.16 ft at 9:30PM Oct 27, 2020Observed: 2.17 ft at 9:45PM Oct 27, 2020Observed: 2.16 ft at 10:00PM Oct 27, 2020Observed: 2.16 ft at 10:15PM Oct 27, 2020Observed: 2.16 ft at 10:30PM Oct 27, 2020Observed: 2.16 ft at 10:45PM Oct 27, 2020Observed: 2.16 ft at 11:00PM Oct 27, 2020Observed: 2.16 ft at 11:15PM Oct 27, 2020Observed: 2.16 ft at 11:30PM Oct 27, 2020Observed: 2.16 ft at 11:45PM Oct 27, 2020Observed: 2.16 ft at 12:00AM Oct 28, 2020Observed: 2.16 ft at 12:15AM Oct 28, 2020Observed: 2.16 ft at 12:30AM Oct 28, 2020Observed: 2.16 ft at 12:45AM Oct 28, 2020Observed: 2.16 ft at 1:00AM Oct 28, 2020Observed: 2.16 ft at 1:15AM Oct 28, 2020Observed: 2.16 ft at 1:30AM Oct 28, 2020Observed: 2.16 ft at 1:45AM Oct 28, 2020Observed: 2.16 ft at 2:00AM Oct 28, 2020Observed: 2.16 ft at 2:15AM Oct 28, 2020Observed: 2.16 ft at 2:30AM Oct 28, 2020Observed: 2.16 ft at 2:45AM Oct 28, 2020Observed: 2.16 ft at 3:00AM Oct 28, 2020Observed: 2.16 ft at 3:15AM Oct 28, 2020Observed: 2.16 ft at 3:30AM Oct 28, 2020Observed: 2.16 ft at 3:45AM Oct 28, 2020Observed: 2.16 ft at 3:46AM Oct 28, 2020Observed: 2.16 ft at 4:00AM Oct 28, 2020Observed: 2.16 ft at 4:01AM Oct 28, 2020Observed: 2.16 ft at 4:15AM Oct 28, 2020Observed: 2.16 ft at 4:16AM Oct 28, 2020Observed: 2.16 ft at 4:30AM Oct 28, 2020Observed: 2.16 ft at 4:45AM Oct 28, 2020Observed: 2.16 ft at 5:00AM Oct 28, 2020Observed: 2.16 ft at 5:15AM Oct 28, 2020Observed: 2.16 ft at 5:30AM Oct 28, 2020Observed: 2.16 ft at 5:45AM Oct 28, 2020Observed: 2.17 ft at 6:00AM Oct 28, 2020Observed: 2.16 ft at 6:15AM Oct 28, 2020Observed: 2.17 ft at 6:30AM Oct 28, 2020Observed: 2.17 ft at 6:45AM Oct 28, 2020Observed: 2.16 ft at 7:00AM Oct 28, 2020Observed: 2.17 ft at 7:15AM Oct 28, 2020Observed: 2.17 ft at 7:30AM Oct 28, 2020Observed: 2.17 ft at 7:45AM Oct 28, 2020Observed: 2.17 ft at 8:00AM Oct 28, 2020Observed: 2.17 ft at 8:15AM Oct 28, 2020Observed: 2.17 ft at 8:30AM Oct 28, 2020Observed: 2.17 ft at 8:45AM Oct 28, 2020Observed: 2.17 ft at 9:00AM Oct 28, 2020Observed: 2.17 ft at 9:15AM Oct 28, 2020Observed: 2.17 ft at 9:30AM Oct 28, 2020Observed: 2.16 ft at 9:45AM Oct 28, 2020Observed: 2.16 ft at 10:00AM Oct 28, 2020Observed: 2.17 ft at 10:15AM Oct 28, 2020Observed: 2.17 ft at 10:30AM Oct 28, 2020Observed: 2.16 ft at 10:45AM Oct 28, 2020Observed: 2.17 ft at 11:00AM Oct 28, 2020Observed: 2.17 ft at 11:15AM Oct 28, 2020Observed: 2.17 ft at 11:30AM Oct 28, 2020Observed: 2.17 ft at 11:45AM Oct 28, 2020Observed: 2.17 ft at 12:00PM Oct 28, 2020Observed: 2.17 ft at 12:15PM Oct 28, 2020Observed: 2.17 ft at 12:30PM Oct 28, 2020Observed: 2.17 ft at 12:45PM Oct 28, 2020Observed: 2.18 ft at 1:00PM Oct 28, 2020Observed: 2.18 ft at 1:15PM Oct 28, 2020Observed: 2.18 ft at 1:30PM Oct 28, 2020Observed: 2.18 ft at 1:45PM Oct 28, 2020Observed: 2.18 ft at 2:00PM Oct 28, 2020Observed: 2.19 ft at 2:15PM Oct 28, 2020Observed: 2.19 ft at 2:30PM Oct 28, 2020Observed: 2.2 ft at 2:45PM Oct 28, 2020Observed: 2.2 ft at 3:00PM Oct 28, 2020Observed: 2.2 ft at 3:15PM Oct 28, 2020Observed: 2.21 ft at 3:30PM Oct 28, 2020Observed: 2.21 ft at 3:45PM Oct 28, 2020Observed: 2.21 ft at 4:00PM Oct 28, 2020Observed: 2.22 ft at 4:15PM Oct 28, 2020Observed: 2.22 ft at 4:30PM Oct 28, 2020Observed: 2.22 ft at 4:45PM Oct 28, 2020Highest Observation: 2.23 ft at 5:00PM Oct 28, 2020Observed: 2.22 ft at 5:15PM Oct 28, 2020Highest Observation: 2.23 ft at 5:30PM Oct 28, 2020Highest Observation: 2.23 ft at 5:45PM Oct 28, 2020Highest Observation: 2.23 ft at 6:00PM Oct 28, 2020Observed: 2.22 ft at 6:15PM Oct 28, 2020Observed: 2.22 ft at 6:30PM Oct 28, 2020Observed: 2.22 ft at 6:45PM Oct 28, 2020Observed: 2.22 ft at 7:00PM Oct 28, 2020Observed: 2.22 ft at 7:15PM Oct 28, 2020Observed: 2.22 ft at 7:30PM Oct 28, 2020Observed: 2.22 ft at 7:45PM Oct 28, 2020Observed: 2.22 ft at 7:46PM Oct 28, 2020Observed: 2.22 ft at 8:00PM Oct 28, 2020Observed: 2.22 ft at 8:01PM Oct 28, 2020Observed: 2.21 ft at 8:15PM Oct 28, 2020Observed: 2.21 ft at 8:16PM Oct 28, 2020Observed: 2.22 ft at 8:30PM Oct 28, 2020Observed: 2.22 ft at 8:45PM Oct 28, 2020Observed: 2.21 ft at 9:00PM Oct 28, 2020Observed: 2.21 ft at 9:15PM Oct 28, 2020Observed: 2.21 ft at 9:30PM Oct 28, 2020Observed: 2.21 ft at 9:45PM Oct 28, 2020Observed: 2.21 ft at 10:00PM Oct 28, 2020Observed: 2.21 ft at 10:15PM Oct 28, 2020Observed: 2.21 ft at 10:30PM Oct 28, 2020Observed: 2.21 ft at 10:45PM Oct 28, 2020Observed: 2.2 ft at 11:00PM Oct 28, 2020Observed: 2.2 ft at 11:15PM Oct 28, 2020Observed: 2.2 ft at 11:30PM Oct 28, 2020Observed: 2.2 ft at 11:45PM Oct 28, 2020Observed: 2.2 ft at 12:00AM Oct 29, 2020Observed: 2.2 ft at 12:15AM Oct 29, 2020Observed: 2.2 ft at 12:30AM Oct 29, 2020Observed: 2.2 ft at 12:45AM Oct 29, 2020Observed: 2.19 ft at 1:00AM Oct 29, 2020Observed: 2.19 ft at 1:15AM Oct 29, 2020Observed: 2.19 ft at 1:30AM Oct 29, 2020Observed: 2.2 ft at 1:45AM Oct 29, 2020Observed: 2.2 ft at 2:00AM Oct 29, 2020Observed: 2.19 ft at 2:15AM Oct 29, 2020Observed: 2.2 ft at 2:30AM Oct 29, 2020Observed: 2.19 ft at 2:45AM Oct 29, 2020Observed: 2.2 ft at 3:00AM Oct 29, 2020Observed: 2.19 ft at 3:15AM Oct 29, 2020Observed: 2.2 ft at 3:30AM Oct 29, 2020Observed: 2.19 ft at 3:45AM Oct 29, 2020Observed: 2.19 ft at 3:46AM Oct 29, 2020Observed: 2.19 ft at 4:00AM Oct 29, 2020Observed: 2.19 ft at 4:01AM Oct 29, 2020Observed: 2.2 ft at 4:15AM Oct 29, 2020Observed: 2.2 ft at 4:16AM Oct 29, 2020Observed: 2.2 ft at 4:30AM Oct 29, 2020Observed: 2.2 ft at 4:45AM Oct 29, 2020Observed: 2.19 ft at 5:00AM Oct 29, 2020Observed: 2.19 ft at 5:15AM Oct 29, 2020Observed: 2.19 ft at 5:30AM Oct 29, 2020Observed: 2.19 ft at 5:45AM Oct 29, 2020Observed: 2.19 ft at 6:00AM Oct 29, 2020Observed: 2.18 ft at 6:15AM Oct 29, 2020Observed: 2.18 ft at 6:30AM Oct 29, 2020Observed: 2.19 ft at 6:45AM Oct 29, 2020Observed: 2.19 ft at 7:00AM Oct 29, 2020Observed: 2.19 ft at 7:15AM Oct 29, 2020Observed: 2.18 ft at 7:30AM Oct 29, 2020Observed: 2.18 ft at 7:45AM Oct 29, 2020Observed: 2.18 ft at 8:00AM Oct 29, 2020Observed: 2.18 ft at 8:15AM Oct 29, 2020Observed: 2.18 ft at 8:30AM Oct 29, 2020Observed: 2.18 ft at 8:45AM Oct 29, 2020Observed: 2.18 ft at 9:00AM Oct 29, 2020Observed: 2.17 ft at 9:15AM Oct 29, 2020Observed: 2.17 ft at 9:30AM Oct 29, 2020Observed: 2.17 ft at 9:45AM Oct 29, 2020Observed: 2.18 ft at 10:00AM Oct 29, 2020Observed: 2.17 ft at 10:15AM Oct 29, 2020Observed: 2.18 ft at 10:30AM Oct 29, 2020Observed: 2.18 ft at 10:45AM Oct 29, 2020Observed: 2.18 ft at 11:00AM Oct 29, 2020Observed: 2.18 ft at 11:15AM Oct 29, 2020Observed: 2.17 ft at 11:30AM Oct 29, 2020Observed: 2.18 ft at 11:45AM Oct 29, 2020Observed: 2.18 ft at 11:46AM Oct 29, 2020Observed: 2.17 ft at 12:00PM Oct 29, 2020Observed: 2.17 ft at 12:01PM Oct 29, 2020Observed: 2.18 ft at 12:15PM Oct 29, 2020Observed: 2.18 ft at 12:16PM Oct 29, 2020Observed: 2.19 ft at 12:30PM Oct 29, 2020Observed: 2.18 ft at 12:45PM Oct 29, 2020Observed: 2.18 ft at 1:00PM Oct 29, 2020Observed: 2.19 ft at 1:15PM Oct 29, 2020Observed: 2.18 ft at 1:30PM Oct 29, 2020Observed: 2.2 ft at 1:45PM Oct 29, 2020Observed: 2.19 ft at 2:00PM Oct 29, 2020Observed: 2.2 ft at 2:15PM Oct 29, 2020Observed: 2.2 ft at 2:30PM Oct 29, 2020Observed: 2.19 ft at 2:45PM Oct 29, 2020Observed: 2.2 ft at 3:00PM Oct 29, 2020Observed: 2.2 ft at 3:15PM Oct 29, 2020Observed: 2.2 ft at 3:30PM Oct 29, 2020Observed: 2.2 ft at 3:45PM Oct 29, 2020Observed: 2.2 ft at 4:00PM Oct 29, 2020Observed: 2.2 ft at 4:15PM Oct 29, 2020Observed: 2.2 ft at 4:30PM Oct 29, 2020Observed: 2.19 ft at 4:45PM Oct 29, 2020Observed: 2.21 ft at 5:00PM Oct 29, 2020Observed: 2.2 ft at 5:15PM Oct 29, 2020Observed: 2.2 ft at 5:30PM Oct 29, 2020Observed: 2.21 ft at 5:45PM Oct 29, 2020Observed: 2.2 ft at 6:00PM Oct 29, 2020Observed: 2.2 ft at 6:15PM Oct 29, 2020Observed: 2.2 ft at 6:30PM Oct 29, 2020Observed: 2.2 ft at 6:45PM Oct 29, 2020Observed: 2.2 ft at 7:00PM Oct 29, 2020Observed: 2.2 ft at 7:15PM Oct 29, 2020Observed: 2.2 ft at 7:30PM Oct 29, 2020Observed: 2.21 ft at 7:45PM Oct 29, 2020Observed: 2.21 ft at 8:00PM Oct 29, 2020Observed: 2.2 ft at 8:15PM Oct 29, 2020Observed: 2.21 ft at 8:30PM Oct 29, 2020Observed: 2.19 ft at 8:45PM Oct 29, 2020Observed: 2.2 ft at 9:00PM Oct 29, 2020Observed: 2.19 ft at 9:15PM Oct 29, 2020Observed: 2.2 ft at 9:30PM Oct 29, 2020Observed: 2.2 ft at 9:45PM Oct 29, 2020Observed: 2.2 ft at 10:00PM Oct 29, 2020Observed: 2.2 ft at 10:15PM Oct 29, 2020Observed: 2.2 ft at 10:30PM Oct 29, 2020Observed: 2.2 ft at 10:45PM Oct 29, 2020Observed: 2.2 ft at 11:00PM Oct 29, 2020Observed: 2.2 ft at 11:15PM Oct 29, 2020Observed: 2.2 ft at 11:30PM Oct 29, 2020Observed: 2.2 ft at 11:45PM Oct 29, 2020Observed: 2.2 ft at 12:00AM Oct 30, 2020Observed: 2.2 ft at 12:15AM Oct 30, 2020Observed: 2.2 ft at 12:30AM Oct 30, 2020Observed: 2.2 ft at 12:45AM Oct 30, 2020Observed: 2.2 ft at 1:00AM Oct 30, 2020Observed: 2.2 ft at 1:15AM Oct 30, 2020Observed: 2.19 ft at 1:30AM Oct 30, 2020Observed: 2.19 ft at 1:45AM Oct 30, 2020Observed: 2.2 ft at 2:00AM Oct 30, 2020Observed: 2.19 ft at 2:15AM Oct 30, 2020Observed: 2.19 ft at 2:30AM Oct 30, 2020Observed: 2.19 ft at 2:45AM Oct 30, 2020Observed: 2.19 ft at 3:00AM Oct 30, 2020Observed: 2.2 ft at 3:15AM Oct 30, 2020Observed: 2.19 ft at 3:30AM Oct 30, 2020Observed: 2.2 ft at 3:45AM Oct 30, 2020Observed: 2.2 ft at 4:00AM Oct 30, 2020Observed: 2.19 ft at 4:15AM Oct 30, 2020Observed: 2.19 ft at 4:30AM Oct 30, 2020Observed: 2.2 ft at 4:45AM Oct 30, 2020Observed: 2.2 ft at 5:00AM Oct 30, 2020Observed: 2.18 ft at 5:15AM Oct 30, 2020Observed: 2.19 ft at 5:30AM Oct 30, 2020Observed: 2.19 ft at 5:45AM Oct 30, 2020Observed: 2.19 ft at 6:00AM Oct 30, 2020Observed: 2.18 ft at 6:15AM Oct 30, 2020Observed: 2.19 ft at 6:30AM Oct 30, 2020Observed: 2.19 ft at 6:45AM Oct 30, 2020Observed: 2.19 ft at 7:00AM Oct 30, 2020Observed: 2.18 ft at 7:15AM Oct 30, 2020Observed: 2.18 ft at 7:30AM Oct 30, 2020Observed: 2.18 ft at 7:45AM Oct 30, 2020Observed: 2.18 ft at 8:00AM Oct 30, 2020Observed: 2.18 ft at 8:15AM Oct 30, 2020Observed: 2.18 ft at 8:30AM Oct 30, 2020Observed: 2.18 ft at 8:45AM Oct 30, 2020Observed: 2.18 ft at 9:00AM Oct 30, 2020Observed: 2.18 ft at 9:15AM Oct 30, 2020Observed: 2.18 ft at 9:30AM Oct 30, 2020Observed: 2.18 ft at 9:45AM Oct 30, 2020Observed: 2.18 ft at 10:00AM Oct 30, 2020Observed: 2.18 ft at 10:15AM Oct 30, 2020Observed: 2.18 ft at 10:30AM Oct 30, 2020Observed: 2.19 ft at 10:45AM Oct 30, 2020Observed: 2.19 ft at 11:00AM Oct 30, 2020USGS--Water Resources of the United StatesFLOS2(plotting HGIRG) Graph Created (12:00PM Oct 30, 2020)ObservedLatest observed value: 2.19 ft at 11:00 AM CDT 30-Oct-2020. Flood Stage is 8 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts are not available for the Big Sioux River near Florence. Only observed stages are available for this point.

Vertical Datum updated from NGVD29 to NAVD88 by gauge owner.

Return to Area Map
Downstream Gauge Downstream Gauge - near Watertown
Flood Categories (in feet)
Major Flood Stage: 9
Moderate Flood Stage: 8.5
Flood Stage: 8
Action Stage: 7
Low Stage (in feet): -9999

Historic Crests
(1) 9.52 ft on 04/02/1997
(2) 9.18 ft on 07/25/1993
(3) 9.08 ft on 03/29/1986
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.95 ft on 03/27/2019
(2) 6.37 ft on 02/22/2017
(3) 4.09 ft on 04/26/2016
Show More Recent Crests

(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:14
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
12 The bridge at the gauge and the bridge 2 miles south of the gauge are both overtopped
10.5 The bridge 1 mile north of the gauge is overtopped
10 The water reaches the bottom of the bridge at the gauge and the bridge 2 miles south of the gauge the bridge 1 mile east and 1 1/2 mile north of the gauge is overtopped
9 The water reaches the bottom of the bridge 1 mile north of the gauge
8.5 The water reaches the bottom of the bridge 1 mile east and 1 1/2 mile north of the gauge
About This Location Collapse

Latitude: 45.180833° N, Longitude: 97.185833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 8 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 1781.54 1789.54 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  

Current/Historical Observations:

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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
Aberdeen Weather Forecast Office
824 Brown County 14 South
Aberdeen, SD 57401
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Page last modified: 1-Mar-2019 12:34 AM
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