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Local weather forecast by
What is AHPS?
Weather Forecast Office St. Louis, MO
North Central River Forecast Center
River at a Glance
Weekly Chance of Exceeding Levels
Chance of Exceeding Levels During Entire Period
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Tabular Data (UTC)
Tabular Data (CDT)
Datum: Not Available
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.
Forecasts for the Mississippi River at Clarksville Lock and Dam 24 are issued routinely year-round.
Scale to Flood Categories
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Flood Categories (in feet)
Major Flood Stage:
Moderate Flood Stage:
(1) 37.73 ft on 07/29/1993
(2) 36.76 ft on 04/24/1973
(3) 36.70 ft on 06/24/2008
(4) 35.30 ft on 04/22/2013
(5) 34.70 ft on 05/16/2001
(6) 33.70 ft on 10/05/1986
(7) 33.24 ft on 04/06/1983
(8) 32.70 ft on 05/30/1996
(9) 32.44 ft on 04/13/1979
(10) 32.40 ft on 04/17/1998
Show More Historical Crests
: Preliminary values subject to further review.
Low Water Records
(1) 9.50 ft on 02/26/1950
(2) 9.95 ft on 01/28/1944
(3) 10.34 ft on 02/25/1965
Show More Low Water Records
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
If you notice any errors in the below information, please contact our
This flow is approximately where CLKM7 goes to "open river" conditions.
Sny Island Cell #4 levee is overtopped.
Sny Island Cell #3 levee is overtopped.
Highway 79 is closed from one mile south of Annada to two miles north of Annada. Route H is closed from Annada to about one mile west of Annada.
Route W (Kentucky Street) is closed for one block between Third Street and Highway 79.
Clarksville city businesses from 1st Street to 3rd Street begin to flood.
IL route 96 from near Mozier to County Road 2 inundated and closed near this height.
Route N is closed between Route D and Highway 79.
Front Street begins to flood.
Burlington Northern SF railroad tracks begin to flood. Also, Highway 79 closes one mile south of Clarksville.
The Clarksville Boat Club, south of Lock & Dam 24, begins to flood. First Street begins flooding. In Hamburg, Illinois, Water Street floods.
East bank (Illinois side) begins to flood. Highway 79 one mile south of Clarksville begins to flood.
Water enters the parking lot entrance at the Clarksville Riverfront Park.
Silo Park just northwest of Clarksville off Highway 79 begins flooding.
State Route P east of Elsberry begins flooding just east of the levee.
The road to Port Marmac, about 15 homes just south of Clarksville, begins flooding.
Flooding begins in unprotected areas.
At this approximate stage, the Corps will take gates out of the river, creating "open river" conditions. This corresponds to an approximate stage of 155,000 cfs.
Lock and Dam tailwater instruments on June 22, 2010 at a stage of 36.5 feet.
Lock and Dam 24 control center on June 22, 2008 at a stage of 36.5 feet.
Clarksville riverfront on 22 June 2008 at 36.5 feet.
Tennessee Street near 3rd Street on 22 June 2008 with a stage of 36.5 feet.
Kentuckty Street near Highway 79 with a stage of 36.5 feet on 22 June 2008.
Tennessee and 3rd Streets on 22 June 2008 with a stage of 36.5 feet.
Clarksville along Highway 79 (2nd Street) on 22 June 2008 with a stage of 36.5 feet.
Along Wilber Street at 3rd Street with a stage of 36.5 feet on 22 June 2008.
Intersection of Highway 79 and W on May 17, 2001 at 34.5 feet.
Along Wilber Street on 22 June 2008 at a stage of 36.5 feet.
Main Street at 1st Street on May 17, 2001 at a stage of 34.4 ft.
Howard Street on May 17, 2001 at a stage of 34.5 feet.
Highway 79 about 1.6 miles south of Clarksville on June 25, 2010 at 31.34 ft.
Clarksville Boat House flooding on June 25, 2010 at a stage of 31.34 feet.
1st Street in Clarksville on June 25, 2010 at a stage of 31.34 feet.
Parking area at the Clarksville Riverfront Park on June 25, 2010 at a stage of 31.34 feet.
Highway P near Elsberry on May 19, 2009 at 29.8 ft.
About This Location
Latitude: 39.373333° N, Longitude: 90.904722° W, Horizontal Datum: NAD83/WGS84
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
Older USGS topographic maps, NGVD29 benchmarks
Older USGS topographic maps, MSL benchmarks
How low could the river get?
River Forecast Centers
River Stage Summary
Inundation Mapping Locations
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USGS Alert Messaging
NWS Precipitation and River Forecasting
AHPS Iframes for Developers
Mobile iNWS for emergency management
AHPS Web Brochure
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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,
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National Weather Service
St. Louis Weather Forecast Office
12 Missouri Research Park Drive
St. Charles, MO 63304
Page last modified: 16-Jul-2014 12:47 AM