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Weather Forecast Office St. Louis, MO North Central River Forecast Center

Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Mississippi River at Saverton Lock and Dam 22 Observed crest: 7.16 ft at 8:00am Feb 05 Observed: 8.39 ft at 8:00am Jan 31 Observed: 8.22 ft at 10:00am Jan 31 Observed: 8.14 ft at 12:00pm Jan 31 Observed: 8.05 ft at 2:00pm Jan 31 Observed: 8 ft at 4:00pm Jan 31 Observed: 7.98 ft at 6:00pm Jan 31 Observed: 7.97 ft at 8:00pm Jan 31 Observed: 7.93 ft at 10:00pm Jan 31 Observed: 7.85 ft at 12:00am Feb 1 Observed: 7.79 ft at 2:00am Feb 1 Observed: 7.75 ft at 4:00am Feb 1 Observed: 7.77 ft at 6:00am Feb 1 Observed: 7.78 ft at 8:00am Feb 1 Observed: 7.77 ft at 10:00am Feb 1 Observed: 7.73 ft at 12:00pm Feb 1 Observed: 7.45 ft at 2:00pm Feb 1 Observed: 7.31 ft at 4:00pm Feb 1 Observed: 7.24 ft at 6:00pm Feb 1 Observed: 7.2 ft at 8:00pm Feb 1 Observed: 7.19 ft at 10:00pm Feb 1 Observed: 7.23 ft at 12:00am Feb 2 Observed: 7.27 ft at 2:00am Feb 2 Observed: 7.27 ft at 4:00am Feb 2 Observed: 7.29 ft at 6:00am Feb 2 Observed: 7.3 ft at 8:00am Feb 2 Observed: 7.33 ft at 10:00am Feb 2 Observed: 7.38 ft at 12:00pm Feb 2 Observed: 7.39 ft at 2:00pm Feb 2 Observed: 7.4 ft at 4:00pm Feb 2 Observed: 7.41 ft at 6:00pm Feb 2 Observed: 7.43 ft at 8:00pm Feb 2 Observed: 7.44 ft at 10:00pm Feb 2 Observed: 7.46 ft at 12:00am Feb 3 Observed: 7.51 ft at 2:00am Feb 3 Observed: 7.51 ft at 4:00am Feb 3 Observed: 7.55 ft at 6:00am Feb 3 Observed: 7.51 ft at 8:00am Feb 3 Observed: 7.52 ft at 10:00am Feb 3 Observed: 7.51 ft at 12:00pm Feb 3 Observed: 7.42 ft at 2:00pm Feb 3 Observed: 7.37 ft at 4:00pm Feb 3 Observed: 7.32 ft at 6:00pm Feb 3 Observed: 7.31 ft at 8:00pm Feb 3 Observed: 7.3 ft at 10:00pm Feb 3 Observed: 7.3 ft at 12:00am Feb 4 Observed: 7.31 ft at 2:00am Feb 4 Observed: 7.31 ft at 4:00am Feb 4 Observed: 7.29 ft at 6:00am Feb 4 Observed: 7.3 ft at 8:00am Feb 4 Observed: 7.29 ft at 10:00am Feb 4 Observed: 7.27 ft at 12:00pm Feb 4 Observed: 7.28 ft at 2:00pm Feb 4 Observed: 7.2 ft at 4:00pm Feb 4 Observed: 7.2 ft at 6:00pm Feb 4 Observed: 7.19 ft at 8:00pm Feb 4 Observed: 7.17 ft at 10:00pm Feb 4 Observed: 7.17 ft at 12:00am Feb 5 Observed: 7.16 ft at 2:00am Feb 5 Observed: 7.16 ft at 4:00am Feb 5 Observed: 7.15 ft at 6:00am Feb 5 Observed: 7.16 ft at 8:00am Feb 5 Observed: 7.15 ft at 10:00am Feb 5 Observed: 7.16 ft at 12:00pm Feb 5 Observed: 7.16 ft at 2:00pm Feb 5 Observed: 7.12 ft at 4:00pm Feb 5 Observed: 7.11 ft at 6:00pm Feb 5 Observed: 7.08 ft at 8:00pm Feb 5 Observed: 7.09 ft at 10:00pm Feb 5 Observed: 7.09 ft at 12:00am Feb 6 Observed: 7.11 ft at 2:00am Feb 6 Observed: 7.11 ft at 4:00am Feb 6 Observed: 7.1 ft at 6:00am Feb 6 Observed: 7.1 ft at 8:00am Feb 6 Observed: 7.11 ft at 10:00am Feb 6 Observed: 7.11 ft at 12:00pm Feb 6 Observed: 7.1 ft at 2:00pm Feb 6 Observed: 7.1 ft at 4:00pm Feb 6 Observed: 7.1 ft at 6:00pm Feb 6 Observed: 7.11 ft at 8:00pm Feb 6 Observed: 7.11 ft at 10:00pm Feb 6 Observed: 7.1 ft at 12:00am Feb 7 Observed: 7.11 ft at 2:00am Feb 7 Observed: 7.11 ft at 4:00am Feb 7 Observed: 7.11 ft at 6:00am Feb 7 Observed: 7.12 ft at 8:00am Feb 7 Observed: 7.12 ft at 10:00am Feb 7 Observed: 7.12 ft at 12:00pm Feb 7 Observed: 7.11 ft at 2:00pm Feb 7 Observed: 7.07 ft at 4:00pm Feb 7 Observed: 7.06 ft at 6:00pm Feb 7 Observed: 7.08 ft at 8:00pm Feb 7 Observed: 7.07 ft at 10:00pm Feb 7 Observed: 7.09 ft at 12:00am Feb 8 Observed: 7.1 ft at 2:00am Feb 8 Observed: 7.1 ft at 4:00am Feb 8 Observed: 7.11 ft at 6:00am Feb 8 Observed: 7.12 ft at 8:00am Feb 8 Observed: 7.11 ft at 10:00am Feb 8 Observed: 7.1 ft at 12:00pm Feb 8 Observed: 7.05 ft at 2:00pm Feb 8 Observed: 7.01 ft at 4:00pm Feb 8 Observed: 7 ft at 6:00pm Feb 8 Observed: 7 ft at 8:00pm Feb 8 Observed: 6.99 ft at 10:00pm Feb 8 Observed: 6.96 ft at 12:00am Feb 9 Observed: 6.95 ft at 2:00am Feb 9 Observed: 6.95 ft at 4:00am Feb 9 Observed: 6.94 ft at 6:00am Feb 9 Observed: 6.95 ft at 8:00am Feb 9 Observed: 6.94 ft at 10:00am Feb 9 Observed: 6.91 ft at 12:00pm Feb 9 Observed: 6.79 ft at 2:00pm Feb 9 Observed: 6.75 ft at 4:00pm Feb 9 Observed: 6.75 ft at 6:00pm Feb 9 Observed: 6.75 ft at 8:00pm Feb 9 Observed: 6.74 ft at 10:00pm Feb 9 Observed: 6.75 ft at 12:00am Feb 10 Observed: 6.75 ft at 2:00am Feb 10 Forecast: 6.9 ft at 12:00pm Feb 9 Forecast: 6.9 ft at 6:00pm Feb 9 Forecast: 6.9 ft at 12:00am Feb 10 Forecast: 6.9 ft at 6:00am Feb 10 Forecast: 6.9 ft at 12:00pm Feb 10 Forecast: 6.9 ft at 6:00pm Feb 10 Forecast: 6.9 ft at 12:00am Feb 11 Forecast: 6.9 ft at 6:00am Feb 11 Forecast: 6.9 ft at 12:00pm Feb 11 Forecast: 6.9 ft at 6:00pm Feb 11 Forecast: 6.8 ft at 12:00am Feb 12 Forecast: 6.8 ft at 6:00am Feb 12 Forecast: 6.8 ft at 12:00pm Feb 12 Forecast: 6.7 ft at 6:00pm Feb 12 Forecast: 6.7 ft at 12:00am Feb 13 Forecast: 6.7 ft at 6:00am Feb 13 Forecast: 6.6 ft at 12:00pm Feb 13 Forecast: 6.6 ft at 6:00pm Feb 13 Forecast: 6.6 ft at 12:00am Feb 14 Forecast: 6.5 ft at 6:00am Feb 14 Forecast: 6.5 ft at 12:00pm Feb 14 Forecast: 6.4 ft at 6:00pm Feb 14 Forecast: 6.4 ft at 12:00am Feb 15 Forecast: 6.3 ft at 6:00am Feb 15 Forecast: 6.3 ft at 12:00pm Feb 15 Forecast: 6.2 ft at 6:00pm Feb 15 Forecast: 6.2 ft at 12:00am Feb 16 Forecast: 6.1 ft at 6:00am Feb 16 Forecast: 6.1 ft at 12:00pm Feb 16 Forecast: 6.1 ft at 6:00pm Feb 16 Forecast: 6 ft at 12:00am Feb 17 Forecast: 6 ft at 6:00am Feb 17 Forecast: 5.9 ft at 12:00pm Feb 17 Forecast: 5.9 ft at 6:00pm Feb 17 Forecast: 5.8 ft at 12:00am Feb 18 Forecast: 5.8 ft at 6:00am Feb 18 Forecast: 5.8 ft at 12:00pm Feb 18 Forecast: 5.7 ft at 6:00pm Feb 18 Forecast: 5.7 ft at 12:00am Feb 19 Forecast: 5.7 ft at 6:00am Feb 19 Forecast: 5.6 ft at 12:00pm Feb 19 Forecast: 5.6 ft at 6:00pm Feb 19 Forecast: 5.6 ft at 12:00am Feb 20 Forecast: 5.6 ft at 6:00am Feb 20 Forecast: 5.6 ft at 12:00pm Feb 20 Forecast: 5.6 ft at 6:00pm Feb 20 Forecast: 5.6 ft at 12:00am Feb 21 Forecast: 5.6 ft at 6:00am Feb 21 Forecast: 5.6 ft at 12:00pm Feb 21 Forecast: 5.5 ft at 6:00pm Feb 21 Forecast: 5.5 ft at 12:00am Feb 22 Forecast: 5.5 ft at 6:00am Feb 22 Forecast: 5.5 ft at 12:00pm Feb 22 Forecast: 5.5 ft at 6:00pm Feb 22 Forecast: 5.5 ft at 12:00am Feb 23 Forecast: 5.5 ft at 6:00am Feb 23 Graph Created (6:50am Feb 10, 2010) Observed Forecast (issued 10:00am Feb 9) Observations courtesy of the US Army Corps of Engineers SVRM7 (plotting HTIRZ) Gage 0 Datum: 446.10 Latest observed value: 6.75 ft at 2:00 AM CST 10-Feb-2010. Flood Stage is 16.0 ft. Forecast data shown here are guidance values only. Please refer to your local NWS office for the latest official public river forecasts. Flow (kcfs)
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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 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

Flood Categories (in feet)
Major Flood Stage:22
Moderate Flood Stage:20
Flood Stage:16
Action Stage:14

Historical Crests
(1) 29.58 ft on 07/25/1993
(2) 28.00 ft on 06/18/2008
(3) 26.80 ft on 04/25/1973
(4) 26.12 ft on 05/16/2001
(5) 24.10 ft on 10/05/1986
Show More Historical Crests

Low Water Records
(1) 3.3 ft on 09/12/2000

 Mississippi River at Saverton Lock and Dam 22 location map

Flood Impacts & Photos Collapse
28.0 In Monkey Run, at least a dozen homes are flooded at this level.
27.8 Saverton homes begin flooding near this level.
27.0 Sny Island Cell #1 levee is overtopped
26.0 In Monkey Run (north of Saverton), houses begin flooding near this level.
25.5 Near this level, Highway E becomes flooded south of the bridge. Also, homes in Riverview Acres (just south of the lock and dam) begin to flood.
25.0 Water enters Lock House.
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.
19.6 The north end of Saverton Road begins to flood.
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.
13.0 This is the lower navigational limit for the pool at Lock & Dam 22.
12.0 Buildings in unprotected areas are damaged.
Photos
(1) Aerial View
(2) Upstream View
(3) Downstream View
(4) Tailwater View
(5) Pool View (US of Dam)
(6) Saverton Lock

About This Location Collapse
Latitude: 39.633472° N, Longitude: 91.247139° 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 N/A N/A Older USGS topographic maps, NGVD29 benchmarks
MSL N/A N/A Older USGS topographic maps, MSL benchmarks
Other 446.1 ft 462.1 ft Datum of 1912.

Additional Information Collapse
How low could the river get?

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Collaborative Agencies Collapse
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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