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Hydrograph River at a Glance Download
Tolomato River above St. Augustine Airport (in MHHW) Stage (ft)Observed: -1.97 ft at 12:00AM May 17, 2022Observed: -1.97 ft at 12:00AM May 18, 2022Observed: -1.97 ft at 12:00AM May 19, 2022Observed: -1.97 ft at 12:00AM May 20, 2022Observed: -1.97 ft at 12:00AM May 21, 2022Florida DEPTOLF1(plotting HGIRG) Graph Created (7:54AM May 21, 2022)ObservedLatest observed value: -1.97 ft at 12:00 AM EDT 21-May-2022. Flood Stage is 1.2 ft
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Tabular Data (UTC)
Tabular Data (EDT)
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Datum: Not Available
NOTE: Water levels are referenced to the Mean Higher High Water (MHHW) Datum. This datum can be used to approximate sea water inundation of normally dry ground near the coast. For specific impacts, please refer to the statements on this page.

NOTE: Forecasts are not available for the Tolomato River above St. Augustine Airport (in MHHW). Only observed stages are available for this point.

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Flood Categories (in feet)
Major Flood Stage: 2.7
Moderate Flood Stage: 1.7
Flood Stage: 1.2
Action Stage: 0.7
Low Stage (in feet): -9999

Historic Crests
(1) 3.61 ft on 09/11/2017
(2) 3.58 ft on 10/07/2016
(3) 2.52 ft on 09/04/2019
(4) 2.06 ft on 09/10/2017
(5) 1.89 ft on 12/08/2014
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(P): Preliminary values subject to further review.

Recent Crests
(1) 1.62 ft on 02/21/2020
(2) 1.28 ft on 01/23/2020
(3) 1.31 ft on 01/22/2020
(4) 1.49 ft on 12/25/2019
(5) 1.48 ft on 11/14/2019
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(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to

Zoom Level:14
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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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Latitude: 29.994722° N, Longitude: 81.329444° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 1.2 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 1.97 3 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
Other Not Available Not Available  
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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
Jacksonville Weather Forecast Office
13701 Fang Drive
Jacksonville, FL 32218
(904) 741-4370
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Page last modified: 2-Nov-2020 7:30 PM
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