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Hydrograph River at a Glance Download
St. Francis River near Saco Stage (ft)Flow (kcfs)USGS--Water Resources of the United StatesSAZM7(plotting HGIRG) Graph Created (7:09AM Jan 23, 2022)Flood Stage is 21 ft
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Datum: NAVD88
NOTE: Forecasts are not available for the St. Francis River near Saco. Only observed stages are available for this point.

Vertical Datum updated from NGVD29 to NAVD88 by gauge owner.

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Upstream Gauge - at Mill Creek Upstream Gauge Downstream Gauge Downstream Gauge - at Patterson
Flood Categories (in feet)
Major Flood Stage: 27
Moderate Flood Stage: 23
Flood Stage: 21
Action Stage: 19
Low Stage (in feet): -9999

Historic Crests
(1) 36.10 ft on 11/14/1993
(2) 33.09 ft on 04/30/2017
(3) 28.93 ft on 03/19/2008
(4) 27.94 ft on 04/26/2011
(5) 27.03 ft on 04/24/2011
(6) 26.50 ft on 12/28/2015
(7) 26.44 ft on 01/04/1993
(8) 25.80 ft on 11/19/1985
(9) 25.00 ft on 10/30/2009
(10) 23.64 ft on 04/22/1996
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(P): Preliminary values subject to further review.

Recent Crests
(1) 33.09 ft on 04/30/2017
(2) 26.50 ft on 12/28/2015
(3) 18.55 ft on 06/20/2015
(4) 18.68 ft on 12/21/2013
(5) 20.14 ft on 01/13/2013
(6) 27.94 ft on 04/26/2011
(7) 27.03 ft on 04/24/2011
(8) 25.00 ft on 10/30/2009
(9) 16.68 ft on 02/11/2009
(10) 28.93 ft on 03/19/2008
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 1.02 ft on 09/01/2007
(2) 1.30 ft on 08/16/2012

For more information on your flood risk go to

Zoom Level:14
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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
34.4 The Highway C bridge roadway surface begins flooding at this height.
26.33 Much of the agricultural field is along the left bank upstream of the Highway C bridge is surrounded by floodwaters at this height.
22.9 Low spot on Highway C. Water begins covering the highway just south of the bridge.
21 Agricultural fields begin flooding along the left bank upstream of the bridge. Height estimated.
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Latitude: 37.384444° N, Longitude: 90.473889° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 21 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 471.91 ft 492.91 ft Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 472 ft 493 ft 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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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
St. Louis Weather Forecast Office
12 Missouri Research Park Drive
St. Charles, MO 63304
(636) 441-8467
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Page last modified: 2-Nov-2020 7:29 PM
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