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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Hydrograph River at a Glance Download
Manatee River (FL) at Manatee Dam Pool (ft)Observed: 37.55 ft at 7:00PM Dec 05, 2023Highest Observation: 37.58 ft at 7:00AM Dec 06, 2023Observed: 37.52 ft at 7:00AM Dec 07, 2023MTDF1(plotting HPIRZ) Graph Created (12:53PM Dec 7, 2023)ObservedLatest observed value: 37.52 ft at 7:00 AM EST 7-Dec-2023. Flood Stage is 41 ft
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Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
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 Manatee River (FL) at Manatee Dam are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - near Myakka Head at SR 64 Upstream Gauge Downstream Gauge Downstream Gauge - at Rye Bridge
Flood Categories (in feet)
Major Flood Stage: 43
Moderate Flood Stage: 42
Flood Stage: 41
Action Stage: 40.8
Low Stage (in feet): 0

Historic Crests
(1) 42.42 ft on 06/22/2003

(P): Preliminary values subject to further review.

Recent Crests
(1) 42.42 ft on 06/22/2003

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
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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.
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If you notice any errors in the below information, please contact our Webmaster
55 Top of the dam.
44 This is the maximum safe pool elevation and the emergency spillway is used.
43 This is the top of the closed gates.
40 This is the normal pool elevation.
About This Location Collapse

Latitude: 27.483333° N, Longitude: 82.350000° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 41 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
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Hydrologic Resources Additional Resources
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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
National Weather Service
Tampa Bay Area Weather Forecast Office
2525 14th Ave SE
Ruskin, FL 33570
(813) 645-2323
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Page last modified: 2-Nov-2020 7:30 PM
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