Advanced Hydrologic Prediction Service: St. Louis: Big River at Byrnesville

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Observations
courtesy of

Weather Forecast Office St. Louis, MO

North Central River Forecast Center

Hydrograph

River at a Glance

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Weekly Chance of
Exceeding Levels

Chance of Exceeding Levels
During Entire Period

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Tabular Data

Datum: N/A

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 Big River at Byrnesville are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge

Flood Categories (in feet)

Major Flood Stage:	28
Moderate Flood Stage:	20
Flood Stage:	16
Action Stage:	13

Historical Crests
(1) 30.20 ft on 08/21/1915
(2) 29.37 ft on 09/25/1993
(3) 27.61 ft on 11/16/1993
(4) 27.57 ft on 04/12/1994
(5) 27.47 ft on 03/20/2008
Show More Historical Crests

Low Water Records
(1) 1.1 ft on 08/16/2007
(2) 1.4 ft on 10/05/2001
(2) 1.4 ft on 09/13/2005
Show More Low Water Records

Flood Impacts & Photos

30.3	The porch of G H Beachman floods at this level.
30.2	This is the RECORD FLOOD LEVEL that was reached in August 1915.
29.6	The main floor at the mill begins to flood.
29.4	The floor of the gage shed begins to flood.
22.7	Highway W near Hoene Spring is closed as water crosses the pavement.
22.4	At this level, Twin Rivers Bridge Road must be closed.
20.0	South Byrnesville Road goes under water near this level.
19.0	Dutch Creek Road south of Byrnesville and Byrnesville Road near John McKeever Road north of Byrnesville begin to flood.
18.0	Cedar Hill Road at Cedar Hill and Klondike Road south of Cedar Hill begin to flood near this height.
17.0	State Highway BB near Cedar Hill begins flooding at this height.
15.5	Rockford Beach Park at the Highway MM bridge begins flooding.

Photos
(1) Byrnesville looking upstream
(2) Byrnesville looking downstream

About This Location

Latitude: 38.382000° N, Longitude: 90.630000° W, Horizontal Datum: NAD83

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	16 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	N/A	N/A	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	433.69 ft	449.69 ft	Older USGS topographic maps, NGVD29 benchmarks
MSL	N/A	N/A	Older USGS topographic maps, MSL benchmarks
Other	N/A	N/A

Other Data Sources:
U.S. Geological Survey (USGS) Data and Site Info for Byrnesville

Additional Information

How low could the river get?

Resources

Hydrologic Resources

Additional Resources

Collaborative Agencies

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: 15-Apr-2009 6:43 PM

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