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Weather Forecast Office St. Louis, MO

North Central River Forecast Center

Hydrograph

River at a Glance

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Tabular Data (UTC)

Tabular Data (CDT)

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 Meramec River near Sullivan are issued as needed during times of high water, but are not routinely available.

Vertical Datum updated from NGVD29 to NAVD88 by gauge owner.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet)

Major Flood Stage:	29
Moderate Flood Stage:	20
Flood Stage:	11
Action Stage:	9
Low Stage (in feet):	-9999

Historic Crests
(1) 36.52 ft on 05/01/2017
(2) 33.50 ft on 08/01/1915
(3) 32.22 ft on 12/04/1982
(4) 32.00 ft on 06/09/1945
(5) 31.69 ft on 03/20/2008
(6) 31.48 ft on 12/29/2015
(7) 29.23 ft on 04/12/1994
(8) 27.95 ft on 11/19/1985
(9) 27.50 ft on 06/19/1985
(10) 27.42 ft on 07/27/1998
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.02 ft on 04/26/2020 (P)
(2) 13.68 ft on 03/25/2020 (P)
(3) 13.19 ft on 03/21/2020 (P)
(4) 12.63 ft on 01/19/2020
(5) 19.14 ft on 01/12/2020
(6) 11.37 ft on 02/08/2019
(7) 12.58 ft on 05/22/2018
(8) 12.63 ft on 03/30/2018
(9) 13.73 ft on 03/28/2018
(10) 20.67 ft on 02/25/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.08 ft on 12/12/2000
(2) 0.10 ft on 11/04/2000
(3) 1.00 ft on 06/12/1977
Show More Low Water Records

For more information on your flood risk go to www.floodsmart.gov.

Show FEMA's National Flood Hazard Layers

Zoom Level:14

	Gauge Location	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

If you notice any errors in the below information, please contact our Webmaster
34	Near the entrance to Meramec State Park off Highway 185 west of the Meramec River bridge, this park access road near the visitor's center will begin flooding near this height.
29	The main office at the Arapaho Campground begins flooding.
28	Springer Road off of Sappington Bridge Road begins flooding near this height.
25	Sappington Bridge boat access parking area and restroom begins flooding near this height.
22	Near this height, Missouri Route W will be closed in both directions beyond Route JJ.
21	Sappington Bridge Road just north of the Meramec River bridge begins flooding near this height.
18.5	Near this height, Missouri Route N will be closed in both directions.
17.3	The Onondaga Cave State Park picnic shelter begins flooding near this height.
17	At this height the entire Arapaho campground will be under water.
15.6	The basic loop of the Onondaga Cave State Park campground begins flooding near this height.
14.5	At this height the Arapaho Campground will evacuate campers. This campground is about 8.5 river miles downstream from the gage. About 14.3 miles upstream of the gage...Cave Road access to Ozark Outdoors begins flooding near this height.
14	The main entrance road to the Meramec State Park campground begins flooding...blocking acess to cabins 1-8...the picnic and playground areas, and the Wilderness Trailhead parking lot. At Onondaga Cave State Park...the primary entrance to the campground is closed and the secondary entrance is used near this height.
13.5	Cave Road begins flooding at Onondaga Cave State Park near this height.
12	The main entrance gate at Onondaga Cave State Park begins flooding near this height. This may eventually force the park to use the rear entrance as the primary entrance to the park.
11.5	A small bridge in the back of Meramec State Park park is flooded, cutting the park in two. If the river continues to rise...park officials will evacuate the campgrounds at this point.
11	Right Bank begins to overflow flooding wooded areas.
6	When the river is rising above this height, canoe outfitters will generally not rent out canoes or rafts.
Photos (1) Meramec Caverns during the record flood of May 2017. (2) Cave Road near the campground entrance at Onondaga Cave State Park on 19 March 2008. (3) Picnic shelter at Onondaga Cave State Park on 19 March 2008 with a stage near 31 feet. (4) Cave Rd just below the visitors center at Onondaga Cave SP on 19 March 2008 with a stage near 31 ft. (5) Playground at Onondaga Cave State Park campgrounds on 19 March 2008 with a stage near 30.6 feet. (6) Springer Road at Sappington Bridge Road on 19 March 2008 at a stage near 30.3 ft. (7) Gaging station at the Sappington Bridge Road bridge on 19 March 2008 with a stage of 30.3 feet. (8) Sappington Bridge Road bridge over the Meramec River on 19 March 2008 at a stage near 30.3 ft. (9) Flooded shelter and park groounds at Meramec State Park on 19 March 2008 at a stage near 30 ft. (10) Park shelter at Meramec State Park just south of Hwy 185 on 19 March 2008 with a stage near 30 ft. (11) Meramec State Park Road looking SW from Hwy 185 on 19 March 2008 with a stage near 30 ft. (12) Camp sites on the northern end of Meramec State Park on 16 March 2012 at a stage near 14.2 feet. (13) Camp sites on the northern end of Meramec State Park on 16 March 2012 at a stage near 14.2 feet. (14) Camp sites on the northern end of Meramec State Park on 16 March 2012 at a stage near 14.2 feet. (15) Flooded campground access road in Meramec State Park on 16 March 2012 at a stage near 14.1 feet. (16) Camp sites adjacent to the Meramec River in Meramec S.P. on 16 March 2012 near a stage of 14.1 feet. (17) Gage shelter on the Meramec River near Sullivan, MO at the Sappington Bridge Road bridge. (18) Sullivan Looking Upstream (19) Sullivan Looking Downstream

About This Location

Latitude: 38.158333° N, Longitude: 91.108333° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	11 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	582.16 ft	593.16 ft	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	581.82 ft	592.82 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:

U.S. Geological Survey (USGS) Data and Site Info for Sullivan

Additional Information

How low could the river get?

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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: 1-Mar-2019 12:34 AM

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