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This probabilistic forecast is issued by the North Central River Forecast Center.
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About this graph
Forecasts for the Mississippi River at Saverton Lock and Dam 22 are issued routinely year-round.
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Upstream Gauge - at Hannibal Upstream Gauge Downstream Gauge Downstream Gauge - at Louisiana
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 24
Moderate Flood Stage: 20
Flood Stage: 16
Action Stage: 14
Low Stage (in feet): -9999

Historic Crests
(1) 29.58 ft on 07/25/1993
(2) 28.48 ft on 06/02/2019
(3) 28.47 ft on 06/02/2019
(4) 28.00 ft on 06/18/2008
(5) 26.80 ft on 04/25/1973
(6) 26.42 ft on 04/21/2013
(7) 26.12 ft on 05/16/2001
(8) 25.78 ft on 07/08/2014
(9) 24.62 ft on 06/01/2013
(10) 24.10 ft on 10/05/1986
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 20.38 ft on 05/06/2023
(2) 17.25 ft on 04/12/2021
(3) 16.36 ft on 03/19/2021
(4) 16.65 ft on 07/02/2020
(5) 17.30 ft on 06/12/2020
(6) 18.98 ft on 04/02/2020
(7) 19.32 ft on 10/17/2019
(8) 28.47 ft on 06/02/2019
(9) 28.48 ft on 06/02/2019
(10) 16.35 ft on 11/06/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 3.03 ft on 10/10/2012
(2) 3.29 ft on 09/12/2003
(3) 3.34 ft on 09/12/2000
Show More Low Water Records
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Gauge LocationGauge Map Marker
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
160000 At this approximate discharge, the Corps will raise the gates out of the water, creating "open river" conditions.
28.6 Water enters the elevated flood building north of the lock house.
28 In Monkey Run, at least a dozen homes are flooded at this level.
27.8 Saverton homes begin flooding near this level.
27.3 The work shop building at Lock and Dam #22 begins flooding at this height.
27 Sny Island Cell #1 levee is overtopped
26 In Monkey Run (north of Saverton), houses begin flooding near this level.
25.7 Water enters Lock house north door and the railroad tracks crossing.
25.5 Homes in Riverview Acres (just south of the lock and dam) begin to flood. Also, North Saverton Road floods near this height.
25.2 Missouri Route E becomes impassable and is closed from Saverton Road near the Hascall Creek bridge to Lock and Dam 22.
24.5 Highway 79 is closed at the Continental Cement Plant.
24.2 Missouri Route E begins flooding at the lowest points.
21.8 At this height, the ties of the BNSF railroad tracks begin flooding.
21.4 Near this level, the lock is closed to navigation. This level will vary with circumstance. Also, BNSF railroad tracks just south of Hannibal are flooded.
15.5 An access road to riverside raised homes on the riverward side of the Sny levee begins to flood near this level.
13.5 This is the upper navigational limit for the pool at Lock & Dam 22.
13.4 This is the target pool for navigation at Lock & Dam 22.
13 This is the lower navigational limit for the pool at Lock & Dam 22.
12 Buildings in unprotected areas are damaged. At this approximate stage, the Corps will lift all gates out of the river, creating "open river" conditions. This takes place at a discharge of around 160,000 cfs.
(1) Saverton Road at the north end of Saverton looking north on 19 June 2008 (HT=26.7 ft.)
(2) State Highway E looking south from Malaruni Creek bridge. (HT=26.7 ft.)
(3) Looking east from Hwy 79 with flooded cropland in foreground and tailwater at 21.5 ft.
(4) Aerial View
(5) Upstream View
(6) Pool View from upstream side of dam
(7) Downstream View
(8) Tailwater View from downstream side of the dam
(9) Saverton Lock looking upstream

Other Real-time and/or Archive Data Sources:

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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
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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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