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Weather Forecast Office Louisville, KY Ohio River Forecast Center
Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Ohio River at McAlpine Lock and Dam Tailwater (ft)Flow (kcfs)Highest Observation: 18.65 ft at 10:45PM May 18, 2013Observed: 18.63 ft at 11:00PM May 18, 2013Observed: 18.62 ft at 11:15PM May 18, 2013Observed: 18.61 ft at 11:30PM May 18, 2013Observed: 18.6 ft at 11:45PM May 18, 2013Observed: 18.63 ft at 12:00AM May 19, 2013Observed: 18.63 ft at 12:15AM May 19, 2013Observed: 18.61 ft at 12:30AM May 19, 2013Observed: 18.61 ft at 12:45AM May 19, 2013Observed: 18.6 ft at 1:00AM May 19, 2013Observed: 18.59 ft at 1:15AM May 19, 2013Observed: 18.57 ft at 1:30AM May 19, 2013Observed: 18.56 ft at 1:45AM May 19, 2013Observed: 18.56 ft at 2:00AM May 19, 2013Observed: 18.55 ft at 2:15AM May 19, 2013Observed: 18.59 ft at 2:30AM May 19, 2013Observed: 18.59 ft at 2:45AM May 19, 2013Observed: 18.58 ft at 3:00AM May 19, 2013Observed: 18.57 ft at 3:15AM May 19, 2013Observed: 18.57 ft at 3:30AM May 19, 2013Observed: 18.56 ft at 3:45AM May 19, 2013Observed: 18.55 ft at 4:00AM May 19, 2013Observed: 18.54 ft at 4:15AM May 19, 2013Observed: 18.53 ft at 4:30AM May 19, 2013Observed: 18.54 ft at 4:45AM May 19, 2013Observed: 18.54 ft at 5:00AM May 19, 2013Observed: 18.54 ft at 5:15AM May 19, 2013Observed: 18.54 ft at 5:30AM May 19, 2013Observed: 18.53 ft at 5:45AM May 19, 2013Observed: 18.53 ft at 6:00AM May 19, 2013Observed: 18.52 ft at 6:15AM May 19, 2013Observed: 18.53 ft at 6:30AM May 19, 2013Observed: 18.53 ft at 6:45AM May 19, 2013Observed: 18.53 ft at 7:00AM May 19, 2013Observed: 18.52 ft at 7:15AM May 19, 2013Observed: 18.51 ft at 7:30AM May 19, 2013Observed: 18.51 ft at 7:45AM May 19, 2013Observed: 18.51 ft at 8:00AM May 19, 2013Observed: 18.5 ft at 8:15AM May 19, 2013Observed: 18.5 ft at 8:30AM May 19, 2013Observed: 18.49 ft at 8:45AM May 19, 2013Observed: 18.49 ft at 9:00AM May 19, 2013Observed: 18.48 ft at 9:15AM May 19, 2013Observed: 18.47 ft at 9:30AM May 19, 2013Observed: 18.44 ft at 9:45AM May 19, 2013Observed: 18.44 ft at 10:00AM May 19, 2013Observed: 18.44 ft at 10:15AM May 19, 2013Observed: 18.44 ft at 10:30AM May 19, 2013Observed: 18.44 ft at 10:45AM May 19, 2013Observed: 18.44 ft at 11:00AM May 19, 2013Observed: 18.47 ft at 11:15AM May 19, 2013Observed: 18.48 ft at 11:30AM May 19, 2013Observed: 18.46 ft at 11:45AM May 19, 2013Observed: 18.45 ft at 12:00PM May 19, 2013Observed: 18.45 ft at 12:15PM May 19, 2013Observed: 18.46 ft at 12:30PM May 19, 2013Observed: 18.47 ft at 12:45PM May 19, 2013Observed: 18.46 ft at 1:00PM May 19, 2013Observed: 18.45 ft at 1:15PM May 19, 2013Observed: 18.45 ft at 1:30PM May 19, 2013Observed: 18.44 ft at 1:45PM May 19, 2013Observed: 18.43 ft at 2:00PM May 19, 2013Observed: 18.45 ft at 2:15PM May 19, 2013Observed: 18.45 ft at 2:30PM May 19, 2013Observed: 18.45 ft at 2:45PM May 19, 2013Observed: 18.44 ft at 3:00PM May 19, 2013Observed: 18.45 ft at 3:15PM May 19, 2013Observed: 18.45 ft at 3:30PM May 19, 2013Observed: 18.47 ft at 3:45PM May 19, 2013Observed: 18.48 ft at 4:00PM May 19, 2013Observed: 18.46 ft at 4:15PM May 19, 2013Observed: 18.45 ft at 4:30PM May 19, 2013Observed: 18.45 ft at 4:45PM May 19, 2013Observed: 18.44 ft at 5:00PM May 19, 2013Observed: 18.44 ft at 5:15PM May 19, 2013Observed: 18.43 ft at 5:30PM May 19, 2013Observed: 18.43 ft at 5:45PM May 19, 2013Observed: 18.43 ft at 6:00PM May 19, 2013Observed: 18.42 ft at 6:15PM May 19, 2013Observed: 18.42 ft at 6:30PM May 19, 2013Observed: 18.42 ft at 6:45PM May 19, 2013Observed: 18.42 ft at 7:00PM May 19, 2013Observed: 18.44 ft at 7:15PM May 19, 2013Observed: 18.43 ft at 7:30PM May 19, 2013Observed: 18.43 ft at 7:45PM May 19, 2013Observed: 18.42 ft at 8:00PM May 19, 2013Observed: 18.45 ft at 8:15PM May 19, 2013Observed: 18.44 ft at 8:30PM May 19, 2013Observed: 18.44 ft at 8:45PM May 19, 2013Observed: 18.47 ft at 9:00PM May 19, 2013Observed: 18.48 ft at 9:15PM May 19, 2013Observed: 18.49 ft at 9:30PM May 19, 2013Observed: 18.46 ft at 9:45PM May 19, 2013Observed: 18.45 ft at 10:00PM May 19, 2013Observed: 18.44 ft at 10:15PM May 19, 2013Observed: 18.43 ft at 10:30PM May 19, 2013Observed: 18.42 ft at 10:45PM May 19, 2013Observed: 18.41 ft at 11:00PM May 19, 2013Observed: 18.45 ft at 11:15PM May 19, 2013Observed: 18.46 ft at 11:30PM May 19, 2013Observed: 18.46 ft at 11:45PM May 19, 2013Observed: 18.45 ft at 12:00AM May 20, 2013Observed: 18.45 ft at 12:15AM May 20, 2013Observed: 18.44 ft at 12:30AM May 20, 2013Observed: 18.43 ft at 12:45AM May 20, 2013Observed: 18.42 ft at 1:00AM May 20, 2013Observed: 18.4 ft at 1:15AM May 20, 2013Observed: 18.39 ft at 1:30AM May 20, 2013Observed: 18.39 ft at 1:45AM May 20, 2013Observed: 18.39 ft at 2:00AM May 20, 2013Observed: 18.38 ft at 2:15AM May 20, 2013Observed: 18.38 ft at 2:30AM May 20, 2013Observed: 18.39 ft at 2:45AM May 20, 2013Observed: 18.41 ft at 3:00AM May 20, 2013Observed: 18.4 ft at 3:15AM May 20, 2013Observed: 18.39 ft at 3:30AM May 20, 2013Observed: 18.39 ft at 3:45AM May 20, 2013Observed: 18.37 ft at 4:00AM May 20, 2013Observed: 18.34 ft at 4:15AM May 20, 2013Observed: 18.34 ft at 4:30AM May 20, 2013Observed: 18.35 ft at 4:45AM May 20, 2013Observed: 18.35 ft at 5:00AM May 20, 2013Observed: 18.37 ft at 5:15AM May 20, 2013Observed: 18.31 ft at 5:30AM May 20, 2013Observed: 18.26 ft at 5:45AM May 20, 2013Observed: 18.23 ft at 6:00AM May 20, 2013Observed: 18.15 ft at 6:15AM May 20, 2013Observed: 18.09 ft at 6:30AM May 20, 2013Observed: 18.07 ft at 6:45AM May 20, 2013Observed: 18.06 ft at 7:00AM May 20, 2013Observed: 18 ft at 7:15AM May 20, 2013Observed: 17.96 ft at 7:30AM May 20, 2013Observed: 17.94 ft at 7:45AM May 20, 2013Observed: 17.94 ft at 8:00AM May 20, 2013Observed: 17.93 ft at 8:15AM May 20, 2013Observed: 17.91 ft at 8:30AM May 20, 2013Observed: 17.91 ft at 8:45AM May 20, 2013Observed: 17.89 ft at 9:00AM May 20, 2013Observed: 17.85 ft at 9:15AM May 20, 2013Observed: 17.85 ft at 9:30AM May 20, 2013Observed: 17.85 ft at 9:45AM May 20, 2013Observed: 17.83 ft at 10:00AM May 20, 2013Observed: 17.79 ft at 10:15AM May 20, 2013Observed: 17.77 ft at 10:30AM May 20, 2013Observed: 17.75 ft at 10:45AM May 20, 2013Observed: 17.73 ft at 11:00AM May 20, 2013Observed: 17.72 ft at 11:15AM May 20, 2013Observed: 17.69 ft at 11:30AM May 20, 2013Observed: 17.66 ft at 11:45AM May 20, 2013Observed: 17.6 ft at 12:00PM May 20, 2013Observed: 17.56 ft at 12:15PM May 20, 2013Observed: 17.52 ft at 12:30PM May 20, 2013Observed: 17.48 ft at 12:45PM May 20, 2013Observed: 17.45 ft at 1:00PM May 20, 2013Observed: 17.42 ft at 1:15PM May 20, 2013Observed: 17.39 ft at 1:30PM May 20, 2013Observed: 17.37 ft at 1:45PM May 20, 2013Observed: 17.35 ft at 2:00PM May 20, 2013Observed: 17.34 ft at 2:15PM May 20, 2013Observed: 17.32 ft at 2:30PM May 20, 2013Observed: 17.31 ft at 2:45PM May 20, 2013Observed: 17.31 ft at 3:00PM May 20, 2013Observed: 17.32 ft at 3:15PM May 20, 2013Observed: 17.29 ft at 3:30PM May 20, 2013Observed: 17.27 ft at 3:45PM May 20, 2013Observed: 17.26 ft at 4:00PM May 20, 2013Observed: 17.32 ft at 4:15PM May 20, 2013Observed: 17.31 ft at 4:30PM May 20, 2013Observed: 17.29 ft at 4:45PM May 20, 2013Observed: 17.26 ft at 5:00PM May 20, 2013Observed: 17.23 ft at 5:15PM May 20, 2013Observed: 17.19 ft at 5:30PM May 20, 2013Observed: 17.14 ft at 5:45PM May 20, 2013Observed: 17.1 ft at 6:00PM May 20, 2013Observed: 17.06 ft at 6:15PM May 20, 2013Observed: 17.03 ft at 6:30PM May 20, 2013Observed: 17 ft at 6:45PM May 20, 2013Observed: 16.97 ft at 7:00PM May 20, 2013Observed: 16.95 ft at 7:15PM May 20, 2013Observed: 16.94 ft at 7:30PM May 20, 2013Observed: 16.94 ft at 7:45PM May 20, 2013Observed: 16.94 ft at 8:00PM May 20, 2013Observed: 16.93 ft at 8:15PM May 20, 2013Observed: 16.89 ft at 8:30PM May 20, 2013Observed: 16.85 ft at 8:45PM May 20, 2013Observed: 16.82 ft at 9:00PM May 20, 2013Observed: 16.78 ft at 9:15PM May 20, 2013Observed: 16.74 ft at 9:30PM May 20, 2013Observed: 16.7 ft at 9:45PM May 20, 2013Observed: 16.68 ft at 10:00PM May 20, 2013Observed: 16.65 ft at 10:15PM May 20, 2013Observed: 16.64 ft at 10:30PM May 20, 2013Observed: 16.63 ft at 10:45PM May 20, 2013Observed: 16.65 ft at 11:00PM May 20, 2013Observed: 16.63 ft at 11:15PM May 20, 2013Observed: 16.61 ft at 11:30PM May 20, 2013Observed: 16.62 ft at 11:45PM May 20, 2013Observed: 16.6 ft at 12:00AM May 21, 2013Observed: 16.57 ft at 12:15AM May 21, 2013Observed: 16.56 ft at 12:30AM May 21, 2013Observed: 16.53 ft at 12:45AM May 21, 2013Observed: 16.51 ft at 1:00AM May 21, 2013Observed: 16.5 ft at 1:15AM May 21, 2013Observed: 16.49 ft at 1:30AM May 21, 2013Observed: 16.49 ft at 1:45AM May 21, 2013Observed: 16.51 ft at 2:00AM May 21, 2013Observed: 16.51 ft at 2:15AM May 21, 2013Observed: 16.49 ft at 2:30AM May 21, 2013Observed: 16.47 ft at 2:45AM May 21, 2013Observed: 16.46 ft at 3:00AM May 21, 2013Observed: 16.47 ft at 3:15AM May 21, 2013Observed: 16.47 ft at 3:30AM May 21, 2013Observed: 16.46 ft at 3:45AM May 21, 2013Observed: 16.43 ft at 4:00AM May 21, 2013Observed: 16.41 ft at 4:15AM May 21, 2013Observed: 16.4 ft at 4:30AM May 21, 2013Observed: 16.44 ft at 4:45AM May 21, 2013Observed: 16.43 ft at 5:00AM May 21, 2013Observed: 16.42 ft at 5:15AM May 21, 2013Observed: 16.39 ft at 5:30AM May 21, 2013Observed: 16.41 ft at 5:45AM May 21, 2013Observed: 16.38 ft at 6:00AM May 21, 2013Observed: 16.31 ft at 6:15AM May 21, 2013Observed: 16.27 ft at 6:30AM May 21, 2013Observed: 16.24 ft at 6:45AM May 21, 2013Observed: 16.23 ft at 7:00AM May 21, 2013Observed: 16.19 ft at 7:15AM May 21, 2013Observed: 16.17 ft at 7:30AM May 21, 2013Observed: 16.18 ft at 7:45AM May 21, 2013Observed: 16.18 ft at 8:00AM May 21, 2013Observed: 16.15 ft at 8:15AM May 21, 2013Observed: 16.09 ft at 8:30AM May 21, 2013Observed: 16.03 ft at 8:45AM May 21, 2013Observed: 15.97 ft at 9:00AM May 21, 2013Observed: 15.97 ft at 9:15AM May 21, 2013Observed: 15.96 ft at 9:30AM May 21, 2013Observed: 15.92 ft at 9:45AM May 21, 2013Observed: 15.89 ft at 10:00AM May 21, 2013Observed: 15.85 ft at 10:15AM May 21, 2013Observed: 15.83 ft at 10:30AM May 21, 2013Observed: 15.8 ft at 10:45AM May 21, 2013Observed: 15.78 ft at 11:00AM May 21, 2013Observed: 15.77 ft at 11:15AM May 21, 2013Observed: 15.75 ft at 11:30AM May 21, 2013Observed: 15.73 ft at 11:45AM May 21, 2013Observed: 15.72 ft at 12:00PM May 21, 2013Observed: 15.71 ft at 12:15PM May 21, 2013Observed: 15.69 ft at 12:30PM May 21, 2013Observed: 15.68 ft at 12:45PM May 21, 2013Observed: 15.66 ft at 1:00PM May 21, 2013Observed: 15.66 ft at 1:15PM May 21, 2013Observed: 15.65 ft at 1:30PM May 21, 2013Observed: 15.66 ft at 1:45PM May 21, 2013Observed: 15.65 ft at 2:00PM May 21, 2013Observed: 15.66 ft at 2:15PM May 21, 2013Observed: 15.65 ft at 2:30PM May 21, 2013Observed: 15.64 ft at 2:45PM May 21, 2013Observed: 15.65 ft at 3:00PM May 21, 2013Observed: 15.69 ft at 3:15PM May 21, 2013Observed: 15.68 ft at 3:30PM May 21, 2013Observed: 15.67 ft at 3:45PM May 21, 2013Observed: 15.68 ft at 4:00PM May 21, 2013Observed: 15.75 ft at 4:15PM May 21, 2013Observed: 15.74 ft at 4:30PM May 21, 2013Observed: 15.7 ft at 4:45PM May 21, 2013Observed: 15.64 ft at 5:00PM May 21, 2013Observed: 15.63 ft at 5:15PM May 21, 2013Observed: 15.6 ft at 5:30PM May 21, 2013Observed: 15.58 ft at 5:45PM May 21, 2013Observed: 15.57 ft at 6:00PM May 21, 2013Observed: 15.56 ft at 6:15PM May 21, 2013Observed: 15.58 ft at 6:30PM May 21, 2013Observed: 15.58 ft at 6:45PM May 21, 2013Observed: 15.56 ft at 7:00PM May 21, 2013Observed: 15.54 ft at 7:15PM May 21, 2013Observed: 15.55 ft at 7:30PM May 21, 2013Observed: 15.55 ft at 7:45PM May 21, 2013Observed: 15.49 ft at 8:00PM May 21, 2013Observed: 15.47 ft at 8:15PM May 21, 2013Observed: 15.44 ft at 8:30PM May 21, 2013Observed: 15.42 ft at 8:45PM May 21, 2013Observed: 15.4 ft at 9:00PM May 21, 2013Observed: 15.38 ft at 9:15PM May 21, 2013Observed: 15.38 ft at 9:30PM May 21, 2013Observed: 15.38 ft at 9:45PM May 21, 2013Observed: 15.36 ft at 10:00PM May 21, 2013Highest Forecast: 15.4 ft 2:00AM May 22, 2013Forecast: 15.2 ft 8:00AM May 22, 2013Forecast: 15.1 ft 2:00PM May 22, 2013Forecast: 14.9 ft 8:00PM May 22, 2013Forecast: 14.9 ft 2:00AM May 23, 2013Forecast: 14.8 ft 8:00AM May 23, 2013Forecast: 14.9 ft 2:00PM May 23, 2013Forecast: 15.1 ft 8:00PM May 23, 2013Forecast: 15.2 ft 2:00AM May 24, 2013Forecast: 15.3 ft 8:00AM May 24, 2013Forecast: 15.3 ft 2:00PM May 24, 2013Forecast: 15.2 ft 8:00PM May 24, 2013USACE - US Army Corps of EngineersMLPK2(plotting HTIRG) Graph Created (10:35PM May 21, 2013)ObservedForecast (issued 2:00PM May 21)Latest observed value: 15.36 ft at 10:00 PM EDT 21-May-2013. Flood Stage is 55 ft
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About this graph
Tabular Data
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Ohio River at McAlpine Lock and Dam are issued routinely year-round.

Return to Area Map
Upstream Gauge - at McAlpine Upper Upstream Gauge Downstream Gauge Downstream Gauge - at Kosmosdale
Flood Categories (in feet)
Major Flood Stage:73
Moderate Flood Stage:65
Flood Stage:55
Action Stage:53

Historical Crests
(1) 85.44 ft on 01/27/1937
(2) 74.40 ft on 03/07/1945
(3) 74.40 ft on 02/16/1884
(4) 73.46 ft on 03/13/1964
(5) 72.70 ft on 04/02/1913
(6) 72.20 ft on 02/16/1883
(7) 70.47 ft on 03/07/1997
(8) 69.60 ft on 02/21/1832
(9) 69.10 ft on 01/22/1907
(10) 68.80 ft on 12/17/1847
Show More Historical Crests

Low Water Records
(1) 0.80 ft on 07/30/1925
(2) 1.60 ft on 10/17/1872
(3) 2.00 ft on 10/19/1895
Show More Low Water Records
Legend
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 Collapse
88.5 The flood will reach the top of the floodwall. A large part of downtown Louisville floods. Parts of I-64 and I-65 flood. Homes along 31W (Dixie Highway) are destroyed. New Albany and Clarksville will suffer major damage.
76 US 31W (Dixie Highway) closed at floodgate.
74 Houk Lane is closed at floodgate.
71 KY 44 is closed.
66 Lock is closed. Floodgates at Riverport are closed.
65 Parts of US 31W (Dixie Highway) flood from I-265 (Gene Synder Freeway) interchange to West Point KY. Riverfront parks in Clarksville and New Albany flood.
59 Overbrook Rd. floods south of Lake Dreamland Rd.
58 IN 111 is floods upstream of Bridgeport.
55 Parks and riverfront areas in Clarksville and New Albany flood. Some yards along US 31W (Dixie Highway) from Pleasure Ridge Park to West Point KY flood.
Photos
(1) Gage House
(2) Lower Pool Staff Gage on South Lock Wall
(3) Upper Section of Staff Gage on Gage House
(4) Lower Section of Staff Gage on Gage House
(5) North Lock Chamber
(6) South Lock Chamber
(7) Another View of South Lock Chamber
(8) South Lock Upper Gate
(9) Looking Upstream at Lock Chambers from Gage House
(10) Bridge Over Lock
(11) Old Lock Office
(12) Public Overlook Area
(13) Repair Station Area
(14) Looking Downstream From Gage House
(15) Hydro Outlet
(16) Another View of Hydro Outlet
(17) Falls of the Ohio from Fossil Bed
(18) Falls of the Ohio from Parking Lot Hill
(19) Falls of the Ohio Upstream from Overlook
(20) Falls of the Ohio Downstream from Overlook
(21) Falls of the Ohio Outlet
About This Location Collapse

Latitude: 38.280278° N, Longitude: 85.799167° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 55 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 373.18 428.18 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 374 ft 429 ft Ohio River Datum 1913

Other Data Sources:
Additional Information Collapse
USGS Streamflow Duration Hydrograph
USGS Long-term Flow Diagram
Short Range (1-3 Day) Ensemble River Forecasts
Medium Range (3-7 Day) Ensemble River Forecasts
Resources Collapse
Hydrologic Resources Additional Resources
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
Louisville Weather Forecast Office
6201 Theiler Lane
Louisville, KY 40229
(502) 969-8842
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Page last modified: 13-Mar-2013 6:34 PM 		Disclaimer
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