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FloodSmart
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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.



Hydrograph River at a Glance Download
Missouri River near Chamois Stage (ft)Flow (kcfs)Observed: -0.7 ft at 7:00AM Sep 19, 2023Observed: -0.7 ft at 7:00AM Sep 20, 2023Observed: -0.7 ft at 7:00AM Sep 21, 2023Observed: -0.7 ft at 7:00AM Sep 22, 2023Observed: -0.5 ft at 7:00AM Sep 23, 2023Forecast: -0.5 ft 1:00PM Sep 23, 2023Forecast: -0.6 ft 7:00PM Sep 23, 2023Forecast: -0.6 ft 1:00AM Sep 24, 2023Forecast: -0.6 ft 7:00AM Sep 24, 2023Forecast: -0.6 ft 1:00PM Sep 24, 2023Forecast: -0.6 ft 7:00PM Sep 24, 2023Forecast: -0.7 ft 1:00AM Sep 25, 2023Forecast: -0.7 ft 7:00AM Sep 25, 2023Forecast: -0.7 ft 1:00PM Sep 25, 2023Forecast: -0.6 ft 7:00PM Sep 25, 2023Forecast: -0.6 ft 1:00AM Sep 26, 2023Forecast: -0.5 ft 7:00AM Sep 26, 2023Forecast: -0.4 ft 1:00PM Sep 26, 2023Forecast: -0.3 ft 7:00PM Sep 26, 2023Forecast: -0.3 ft 1:00AM Sep 27, 2023Forecast: -0.2 ft 7:00AM Sep 27, 2023Forecast: -0.2 ft 1:00PM Sep 27, 2023Forecast: -0.2 ft 7:00PM Sep 27, 2023Forecast: -0.2 ft 1:00AM Sep 28, 2023Forecast: -0.3 ft 7:00AM Sep 28, 2023CMSM7(plotting HGIRZ) Graph Created (11:41AM Sep 23, 2023)ObservedForecast (issued 9:30AM Sep 23)Latest observed value: -0.5 ft at 7:00 AM CDT 23-Sep-2023. Flood Stage is 17 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Missouri River near Chamois are issued routinely year-round.

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Upstream Gauge - at Jefferson City Upstream Gauge Downstream Gauge Downstream Gauge - at Hermann
Flood Categories (in feet)
Major Flood Stage: 31
Moderate Flood Stage: 28
Flood Stage: 17
Action Stage: 15
Low Stage (in feet): -9999

Historic Crests
(1) 33.30 ft on 07/31/1993
(2) 29.60 ft on 06/07/2019
(3) 28.70 ft on 04/24/1973
(4) 28.30 ft on 05/04/2017
(5) 28.00 ft on 12/29/2015
(6) 27.92 ft on 06/02/2013
(7) 27.17 ft on 09/16/2008
(8) 26.70 ft on 05/18/1990
(9) 26.30 ft on 02/25/1985
(10) 26.30 ft on 04/13/1994
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 18.50 ft on 06/03/2023
(2) 18.50 ft on 05/06/2022
(3) 23.70 ft on 06/28/2021
(4) 19.90 ft on 04/12/2021
(5) 23.30 ft on 03/19/2021
(6) 17.70 ft on 08/02/2020
(7) 22.00 ft on 05/30/2020
(8) 20.90 ft on 03/20/2020
(9) 17.00 ft on 03/12/2020
(10) 20.10 ft on 01/11/2020
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -5.75 ft on 12/31/2022
(2) -5.70 ft on 12/22/1963
(3) -4.40 ft on 12/29/2000
(4) -4.30 ft on 12/21/1989
(5) -4.20 ft on 01/17/1967
Show More Low Water Records

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
35.3 The Chamois sewage treatment pond levee is overtopped at this height.
34.4 The main floor of the Chamois Community Center begins to flood near this height. Near this height, a barn and farmhouse along City Park Road also begin to flood.
32.3 At this height, a farmhouse along City Park Road begins flooding.
31.3 Near this height, backwater along Dooling Creek will begin flooding homes, garages, and sheds along Main Street north of Hwy 100.
30.8 At this height, the outfield of the Chamois city park ballfield and a utility shed near the left field fence begins flooding.
30.6 The gazebo at the Chamois city park begins flooding near this height.
30.4 Near this height, Route Z west of Morrison will be closed in both directions.
30.2 The playground area of the city park and covered 3rd base line bleachers begin to flood.
30 The Chamois city park begins to flood.
29.9 The utility road behind the outfield fence at Chamois city park begins flooding.
28.5 Highway 100 closed between Chamois and Morrison.
28 Highway 100 near the power plant begins to flood. Also, the Mokane levee just east of Mokane overtops near this height.
27.7 The A-1 levee between Chamois and Morrison is overtopped near this height.
27.2 Near this height, Missouri Route C at Missouri Highway 94 near Mokane will be closed in both directions.
26.5 The Steedman levee northwest of Chamois is overtopped near this level.
26 Highway 100 between St. Aubert and Chamois begins flooding due to creek backwater. Near this height, Missouri Highway 94 will be closed from Route PP to Bluffton. The Jacobs and Tebbetts East levees near Tebbetts are overtopped near this level.
25.7 The Chamois levee just west of Chamois is overtopped near this height.
25.6 Highway 100 just west of Chamois begins flooding near this level.
25.5 Levee A-1 just east of Chamois is overtopped near this level.
25.4 Highway 100 between Morrison and State Route Z begins flooding near this level.
25 Both sections of the Chamois levee system just upstream of Chamois are overtopped near this level.
24.3 Highway 94 near Portland begins flooding near this height.
24.2 The upstream campsite at the Chamois river access campgrounds begins flooding near this height.
17 Flood Stage: Lower lying bottom land begins to flood.
Photos
(1) Cropland east of Chamois on September 17, 2008 at a stage of 25.4 ft.
(2) Highway 100 just west of Chamois on September 17, 2008 at a stage of 25.4 feet.
(3) Looking upstream from the Chamois power plant gaging station at a stage of 19.2 feet.
(4) Looking downstream from the Chamois power plant gaging station at a stage of 19.2 feet.
(5) Pressure gauge height readout at the Chamois plant indicating a stage of 19.2 feet on July 21, 2011.
(6) Pressure readouts at the Chamois power plant on July 21, 2011.
(7) Pressure line and orifice feeding into the Missouri River at the Chamois plant on July 21, 2011.
(8) Slope gage along boat ramp upstream from the power plant.
About This Location Collapse

Latitude: 38.680861° N, Longitude: 91.773222° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 17 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 502.757 ft 519.757 ft 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 502.5 ft 519.5 ft  
Additional Information Collapse
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
St. Louis Weather Forecast Office
12 Missouri Research Park Drive
St. Charles, MO 63304
(636) 441-8467
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