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Hydrograph River at a Glance Download
Nassau River near Tisonia (in MHHW) Stage (ft)Observed: 0.79 ft at 12:00PM Nov 26, 2022Highest Observation: 0.8 ft at 12:15PM Nov 26, 2022Observed: 0.78 ft at 12:30PM Nov 26, 2022Observed: 0.74 ft at 12:45PM Nov 26, 2022Observed: 0.68 ft at 1:00PM Nov 26, 2022Observed: 0.59 ft at 1:15PM Nov 26, 2022Observed: 0.49 ft at 1:30PM Nov 26, 2022Observed: 0.36 ft at 1:45PM Nov 26, 2022Observed: 0.19 ft at 2:00PM Nov 26, 2022Observed: 0.03 ft at 2:15PM Nov 26, 2022Observed: -0.14 ft at 2:30PM Nov 26, 2022Observed: -0.3 ft at 2:45PM Nov 26, 2022Observed: -0.46 ft at 3:00PM Nov 26, 2022Observed: -0.63 ft at 3:15PM Nov 26, 2022Observed: -0.78 ft at 3:30PM Nov 26, 2022Observed: -0.93 ft at 3:45PM Nov 26, 2022Observed: -1.08 ft at 4:00PM Nov 26, 2022Observed: -1.25 ft at 4:15PM Nov 26, 2022Observed: -1.42 ft at 4:30PM Nov 26, 2022Observed: -1.6 ft at 4:45PM Nov 26, 2022Observed: -1.81 ft at 5:00PM Nov 26, 2022Observed: -2 ft at 5:15PM Nov 26, 2022Observed: -2.19 ft at 5:30PM Nov 26, 2022Observed: -2.39 ft at 5:45PM Nov 26, 2022Observed: -2.58 ft at 6:00PM Nov 26, 2022Observed: -2.77 ft at 6:15PM Nov 26, 2022Observed: -2.94 ft at 6:30PM Nov 26, 2022Observed: -3.07 ft at 6:45PM Nov 26, 2022Observed: -3.17 ft at 7:00PM Nov 26, 2022Observed: -3.17 ft at 7:15PM Nov 26, 2022Observed: -3.09 ft at 7:30PM Nov 26, 2022Observed: -2.91 ft at 7:45PM Nov 26, 2022Observed: -2.6 ft at 8:00PM Nov 26, 2022Observed: -2.28 ft at 8:15PM Nov 26, 2022Observed: -1.98 ft at 8:30PM Nov 26, 2022Observed: -1.69 ft at 8:45PM Nov 26, 2022Observed: -1.44 ft at 9:00PM Nov 26, 2022Observed: -1.22 ft at 9:15PM Nov 26, 2022Observed: -1 ft at 9:30PM Nov 26, 2022Observed: -0.78 ft at 9:45PM Nov 26, 2022Observed: -0.58 ft at 10:00PM Nov 26, 2022Observed: -0.41 ft at 10:15PM Nov 26, 2022Observed: -0.27 ft at 10:30PM Nov 26, 2022Observed: -0.15 ft at 10:45PM Nov 26, 2022Observed: -0.05 ft at 11:00PM Nov 26, 2022Observed: 0.03 ft at 11:15PM Nov 26, 2022Observed: 0.1 ft at 11:30PM Nov 26, 2022Observed: 0.17 ft at 11:45PM Nov 26, 2022Observed: 0.2 ft at 12:00AM Nov 27, 2022Observed: 0.23 ft at 12:15AM Nov 27, 2022Observed: 0.23 ft at 12:30AM Nov 27, 2022Observed: 0.21 ft at 12:45AM Nov 27, 2022Observed: 0.15 ft at 1:00AM Nov 27, 2022Observed: 0.06 ft at 1:15AM Nov 27, 2022Observed: -0.07 ft at 1:30AM Nov 27, 2022Observed: -0.22 ft at 1:45AM Nov 27, 2022Observed: -0.37 ft at 2:00AM Nov 27, 2022Observed: -0.53 ft at 2:15AM Nov 27, 2022Observed: -0.72 ft at 2:30AM Nov 27, 2022Observed: -0.88 ft at 2:45AM Nov 27, 2022Observed: -1.04 ft at 3:00AM Nov 27, 2022Observed: -1.18 ft at 3:15AM Nov 27, 2022Observed: -1.33 ft at 3:30AM Nov 27, 2022Observed: -1.5 ft at 3:45AM Nov 27, 2022Observed: -1.69 ft at 4:00AM Nov 27, 2022Observed: -1.89 ft at 4:15AM Nov 27, 2022Observed: -2.09 ft at 4:30AM Nov 27, 2022Observed: -2.28 ft at 4:45AM Nov 27, 2022Observed: -2.49 ft at 5:00AM Nov 27, 2022Observed: -2.69 ft at 5:15AM Nov 27, 2022Observed: -2.9 ft at 5:30AM Nov 27, 2022Observed: -3.1 ft at 5:45AM Nov 27, 2022Observed: -3.31 ft at 6:00AM Nov 27, 2022Observed: -3.46 ft at 6:15AM Nov 27, 2022Observed: -3.6 ft at 6:30AM Nov 27, 2022Observed: -3.71 ft at 6:45AM Nov 27, 2022Observed: -3.7 ft at 7:00AM Nov 27, 2022Observed: -3.56 ft at 7:15AM Nov 27, 2022Observed: -3.35 ft at 7:30AM Nov 27, 2022Observed: -3.04 ft at 7:45AM Nov 27, 2022Observed: -2.7 ft at 8:00AM Nov 27, 2022Observed: -2.37 ft at 8:15AM Nov 27, 2022Observed: -2.09 ft at 8:30AM Nov 27, 2022Observed: -1.83 ft at 8:45AM Nov 27, 2022Observed: -1.55 ft at 9:00AM Nov 27, 2022Observed: -1.31 ft at 9:15AM Nov 27, 2022Observed: -1.05 ft at 9:30AM Nov 27, 2022Observed: -0.8 ft at 9:45AM Nov 27, 2022Observed: -0.55 ft at 10:00AM Nov 27, 2022Observed: -0.33 ft at 10:15AM Nov 27, 2022Observed: -0.18 ft at 10:30AM Nov 27, 2022Observed: -0.01 ft at 10:45AM Nov 27, 2022Observed: 0.13 ft at 11:00AM Nov 27, 2022Observed: 0.22 ft at 11:15AM Nov 27, 2022Observed: 0.32 ft at 11:30AM Nov 27, 2022Observed: 0.42 ft at 11:45AM Nov 27, 2022Observed: 0.48 ft at 12:00PM Nov 27, 2022Observed: 0.55 ft at 12:15PM Nov 27, 2022Observed: 0.6 ft at 12:30PM Nov 27, 2022Observed: 0.61 ft at 12:45PM Nov 27, 2022Observed: 0.63 ft at 1:00PM Nov 27, 2022Observed: 0.62 ft at 1:15PM Nov 27, 2022Observed: 0.58 ft at 1:30PM Nov 27, 2022Observed: 0.53 ft at 1:45PM Nov 27, 2022Observed: 0.44 ft at 2:00PM Nov 27, 2022Observed: 0.34 ft at 2:15PM Nov 27, 2022Observed: 0.18 ft at 2:30PM Nov 27, 2022Observed: -3.95 ft at 6:15AM Nov 28, 2022Observed: -4.17 ft at 6:30AM Nov 28, 2022Observed: -4.3 ft at 8:45AM Nov 29, 2022Observed: -4.38 ft at 9:00AM Nov 29, 2022Observed: -4.38 ft at 9:15AM Nov 29, 2022Observed: -4.22 ft at 9:30AM Nov 29, 2022Observed: -3.96 ft at 9:45AM Nov 29, 2022Observed: -3.64 ft at 10:00AM Nov 29, 2022Observed: -3.34 ft at 10:15AM Nov 29, 2022Observed: -3.04 ft at 10:30AM Nov 29, 2022Observed: -4.22 ft at 11:45AM Nov 29, 2022Observed: -3.96 ft at 12:00PM Nov 29, 2022Observed: -3.64 ft at 12:15PM Nov 29, 2022Observed: -3.34 ft at 12:30PM Nov 29, 2022Observed: -3.04 ft at 12:45PM Nov 29, 2022Observed: -0.13 ft at 1:00PM Nov 29, 2022Observed: 0.01 ft at 1:15PM Nov 29, 2022Observed: 0.09 ft at 1:30PM Nov 29, 2022Observed: 0.19 ft at 1:45PM Nov 29, 2022Observed: 0.26 ft at 2:00PM Nov 29, 2022Observed: 0.31 ft at 2:15PM Nov 29, 2022Observed: 0.35 ft at 2:30PM Nov 29, 2022Observed: 0.38 ft at 2:45PM Nov 29, 2022Observed: 0.37 ft at 3:00PM Nov 29, 2022Observed: 0.34 ft at 3:15PM Nov 29, 2022Observed: 0.29 ft at 3:30PM Nov 29, 2022Observed: 0.21 ft at 3:45PM Nov 29, 2022Observed: 0.09 ft at 4:00PM Nov 29, 2022Observed: -0.04 ft at 4:15PM Nov 29, 2022Observed: -0.2 ft at 4:30PM Nov 29, 2022Observed: -0.37 ft at 4:45PM Nov 29, 2022Observed: -0.54 ft at 5:00PM Nov 29, 2022Observed: -0.72 ft at 5:15PM Nov 29, 2022Observed: -0.89 ft at 5:30PM Nov 29, 2022Observed: -1.04 ft at 5:45PM Nov 29, 2022Observed: -1.2 ft at 6:00PM Nov 29, 2022Observed: -1.34 ft at 6:15PM Nov 29, 2022Observed: -1.51 ft at 6:30PM Nov 29, 2022Observed: -1.69 ft at 6:45PM Nov 29, 2022Observed: -1.9 ft at 7:00PM Nov 29, 2022Observed: -2.09 ft at 7:15PM Nov 29, 2022Observed: -2.31 ft at 7:30PM Nov 29, 2022Observed: -2.51 ft at 7:45PM Nov 29, 2022Observed: -2.72 ft at 8:00PM Nov 29, 2022Observed: -2.92 ft at 8:15PM Nov 29, 2022Observed: -3.12 ft at 8:30PM Nov 29, 2022Observed: -3.3 ft at 8:45PM Nov 29, 2022Observed: -3.46 ft at 9:00PM Nov 29, 2022Observed: -3.6 ft at 9:15PM Nov 29, 2022Observed: -3.69 ft at 9:30PM Nov 29, 2022Observed: -3.72 ft at 9:45PM Nov 29, 2022Observed: -3.68 ft at 10:00PM Nov 29, 2022Observed: -3.49 ft at 10:15PM Nov 29, 2022Observed: -3.21 ft at 10:30PM Nov 29, 2022Observed: -2.93 ft at 10:45PM Nov 29, 2022Observed: -2.66 ft at 11:00PM Nov 29, 2022Observed: -2.36 ft at 11:15PM Nov 29, 2022Observed: -2.12 ft at 11:30PM Nov 29, 2022Observed: -1.89 ft at 11:45PM Nov 29, 2022Observed: -1.67 ft at 12:00AM Nov 30, 2022Observed: -1.44 ft at 12:15AM Nov 30, 2022Observed: -1.21 ft at 12:30AM Nov 30, 2022Observed: -0.99 ft at 12:45AM Nov 30, 2022Observed: -0.78 ft at 1:00AM Nov 30, 2022Observed: -0.58 ft at 1:15AM Nov 30, 2022Observed: -0.42 ft at 1:30AM Nov 30, 2022Observed: -0.3 ft at 1:45AM Nov 30, 2022Observed: -0.18 ft at 2:00AM Nov 30, 2022Observed: -0.09 ft at 2:15AM Nov 30, 2022Observed: -0.02 ft at 2:30AM Nov 30, 2022Observed: 0.01 ft at 2:45AM Nov 30, 2022Observed: 0.03 ft at 3:00AM Nov 30, 2022Observed: 0.04 ft at 3:15AM Nov 30, 2022Observed: 0.01 ft at 3:30AM Nov 30, 2022Observed: -0.05 ft at 3:45AM Nov 30, 2022Observed: -0.14 ft at 4:00AM Nov 30, 2022Observed: -0.24 ft at 4:15AM Nov 30, 2022Observed: -0.37 ft at 4:30AM Nov 30, 2022Observed: -0.52 ft at 4:45AM Nov 30, 2022Observed: -0.68 ft at 5:00AM Nov 30, 2022Observed: -0.84 ft at 5:15AM Nov 30, 2022Observed: -1.01 ft at 5:30AM Nov 30, 2022Observed: -1.17 ft at 5:45AM Nov 30, 2022Observed: -1.32 ft at 6:00AM Nov 30, 2022Observed: -1.47 ft at 6:15AM Nov 30, 2022Observed: -1.64 ft at 6:30AM Nov 30, 2022Observed: -1.84 ft at 6:45AM Nov 30, 2022Observed: -2.02 ft at 7:00AM Nov 30, 2022Observed: -2.23 ft at 7:15AM Nov 30, 2022Observed: -2.45 ft at 7:30AM Nov 30, 2022Observed: -2.65 ft at 7:45AM Nov 30, 2022Observed: -2.86 ft at 8:00AM Nov 30, 2022Observed: -3.05 ft at 8:15AM Nov 30, 2022Observed: -3.24 ft at 8:30AM Nov 30, 2022Observed: -3.45 ft at 8:45AM Nov 30, 2022Observed: -3.61 ft at 9:00AM Nov 30, 2022Observed: -3.76 ft at 9:15AM Nov 30, 2022Observed: -3.85 ft at 9:30AM Nov 30, 2022Observed: -3.88 ft at 9:45AM Nov 30, 2022Observed: -3.83 ft at 10:00AM Nov 30, 2022Observed: -3.67 ft at 10:15AM Nov 30, 2022Observed: -3.42 ft at 10:30AM Nov 30, 2022Observed: -3.15 ft at 10:45AM Nov 30, 2022Observed: -2.85 ft at 11:00AM Nov 30, 2022Observed: -2.59 ft at 11:15AM Nov 30, 2022Observed: -2.38 ft at 11:30AM Nov 30, 2022Observed: -2.14 ft at 11:45AM Nov 30, 2022Observed: -1.9 ft at 12:00PM Nov 30, 2022Observed: -1.66 ft at 12:15PM Nov 30, 2022Observed: -1.43 ft at 12:30PM Nov 30, 2022Observed: -1.18 ft at 12:45PM Nov 30, 2022Observed: -0.9 ft at 1:00PM Nov 30, 2022Observed: -0.73 ft at 1:15PM Nov 30, 2022Observed: -0.47 ft at 1:30PM Nov 30, 2022Observed: -0.3 ft at 1:45PM Nov 30, 2022Observed: -0.14 ft at 2:00PM Nov 30, 2022Observed: 0 ft at 2:15PM Nov 30, 2022Observed: 0.08 ft at 2:30PM Nov 30, 2022Observed: 0.2 ft at 2:45PM Nov 30, 2022Observed: 0.26 ft at 3:00PM Nov 30, 2022Observed: 0.29 ft at 3:15PM Nov 30, 2022Observed: 0.31 ft at 3:30PM Nov 30, 2022Observed: 0.31 ft at 3:45PM Nov 30, 2022Observed: 0.27 ft at 4:00PM Nov 30, 2022Observed: 0.19 ft at 4:15PM Nov 30, 2022Observed: 0.1 ft at 4:30PM Nov 30, 2022Observed: -0.05 ft at 4:45PM Nov 30, 2022Observed: -0.17 ft at 5:00PM Nov 30, 2022Observed: -0.34 ft at 5:15PM Nov 30, 2022Observed: -0.51 ft at 5:30PM Nov 30, 2022Observed: -0.67 ft at 5:45PM Nov 30, 2022Observed: -0.84 ft at 6:00PM Nov 30, 2022Observed: -1 ft at 6:15PM Nov 30, 2022Observed: -1.15 ft at 6:30PM Nov 30, 2022Observed: -1.29 ft at 6:45PM Nov 30, 2022Observed: -1.47 ft at 7:00PM Nov 30, 2022Observed: -1.64 ft at 7:15PM Nov 30, 2022Observed: -1.79 ft at 7:30PM Nov 30, 2022Observed: -1.93 ft at 7:45PM Nov 30, 2022Observed: -2.11 ft at 8:00PM Nov 30, 2022Observed: -2.32 ft at 8:15PM Nov 30, 2022Observed: -2.54 ft at 8:30PM Nov 30, 2022Observed: -2.73 ft at 8:45PM Nov 30, 2022Observed: -2.92 ft at 9:00PM Nov 30, 2022Observed: -3.12 ft at 9:15PM Nov 30, 2022Observed: -3.31 ft at 9:30PM Nov 30, 2022Observed: -3.49 ft at 9:45PM Nov 30, 2022Observed: -3.67 ft at 10:00PM Nov 30, 2022Observed: -3.84 ft at 10:15PM Nov 30, 2022Observed: -3.95 ft at 10:30PM Nov 30, 2022Observed: -3.97 ft at 10:45PM Nov 30, 2022Observed: -4.01 ft at 11:00PM Nov 30, 2022Observed: -3.94 ft at 11:15PM Nov 30, 2022Observed: -3.92 ft at 11:30PM Nov 30, 2022Observed: -3.67 ft at 11:45PM Nov 30, 2022Observed: -3.37 ft at 12:00AM Dec 01, 2022Observed: -3.11 ft at 12:15AM Dec 01, 2022Observed: -2.87 ft at 12:30AM Dec 01, 2022Observed: -2.66 ft at 12:45AM Dec 01, 2022Observed: -2.4 ft at 1:00AM Dec 01, 2022Observed: -2.14 ft at 1:15AM Dec 01, 2022Observed: -1.86 ft at 1:30AM Dec 01, 2022Observed: -1.55 ft at 1:45AM Dec 01, 2022Observed: -1.31 ft at 2:00AM Dec 01, 2022Observed: -1.09 ft at 2:15AM Dec 01, 2022Observed: -0.86 ft at 2:30AM Dec 01, 2022Observed: -0.63 ft at 2:45AM Dec 01, 2022Observed: -0.45 ft at 3:00AM Dec 01, 2022Observed: -0.29 ft at 3:15AM Dec 01, 2022Observed: -0.16 ft at 3:30AM Dec 01, 2022Observed: -0.11 ft at 3:45AM Dec 01, 2022Observed: -0.04 ft at 4:00AM Dec 01, 2022Observed: 0.02 ft at 4:15AM Dec 01, 2022Observed: 0.04 ft at 4:30AM Dec 01, 2022Observed: 0.04 ft at 4:45AM Dec 01, 2022Observed: 0.02 ft at 5:00AM Dec 01, 2022Observed: -0.03 ft at 5:15AM Dec 01, 2022Observed: -0.15 ft at 5:30AM Dec 01, 2022Observed: -0.3 ft at 5:45AM Dec 01, 2022Observed: -0.45 ft at 6:00AM Dec 01, 2022Observed: -0.61 ft at 6:15AM Dec 01, 2022Observed: -0.78 ft at 6:30AM Dec 01, 2022Observed: -0.94 ft at 6:45AM Dec 01, 2022Observed: -1.13 ft at 7:00AM Dec 01, 2022Observed: -1.28 ft at 7:15AM Dec 01, 2022Observed: -1.43 ft at 7:30AM Dec 01, 2022Observed: -1.6 ft at 7:45AM Dec 01, 2022Observed: -1.79 ft at 8:00AM Dec 01, 2022Observed: -1.97 ft at 8:15AM Dec 01, 2022Observed: -2.16 ft at 8:30AM Dec 01, 2022Observed: -2.36 ft at 8:45AM Dec 01, 2022Observed: -2.56 ft at 9:00AM Dec 01, 2022Observed: -2.74 ft at 9:15AM Dec 01, 2022Observed: -2.9 ft at 9:30AM Dec 01, 2022Observed: -3.06 ft at 9:45AM Dec 01, 2022Observed: -3.19 ft at 10:00AM Dec 01, 2022Observed: -3.29 ft at 10:15AM Dec 01, 2022Observed: -3.34 ft at 10:30AM Dec 01, 2022USGS--Water Resources of the United StatesNATF1(plotting HGIRG) Graph Created (11:54AM Dec 1, 2022)ObservedLatest observed value: -3.34 ft at 10:30 AM EST 1-Dec-2022. Flood Stage is 1.3 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
Metadata
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 Nassau River near Tisonia (in MHHW). Only observed stages are available for this point.

Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 3.3
Moderate Flood Stage: 2.3
Flood Stage: 1.3
Action Stage: 0.8
Low Stage (in feet): -6

Historic Crests
(1) 4.01 ft on 09/11/2017
(2) 3.02 ft on 09/29/2022
(3) 2.71 ft on 07/04/1995
(4) 2.33 ft on 10/07/2016 (P)
(5) 2.24 ft on 09/30/2022
(6) 2.20 ft on 09/21/2020
(7) 2.16 ft on 09/10/2017
(8) 2.08 ft on 09/20/2020
(9) 2.04 ft on 11/06/2021
(10) 1.99 ft on 09/13/1985
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 2.24 ft on 09/30/2022
(2) 1.60 ft on 09/30/2022
(3) 3.02 ft on 09/29/2022
(4) 1.78 ft on 09/29/2022
(5) 1.46 ft on 09/28/2022
(6) 1.70 ft on 11/08/2021
(7) 1.81 ft on 11/07/2021
(8) 2.04 ft on 11/06/2021
(9) 1.49 ft on 11/06/2021
(10) 1.64 ft on 11/05/2021
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -5.02 ft on 03/13/1993
(2) -3.57 ft on 03/14/1993
(3) -3.30 ft on 02/15/1992
(4) -3.03 ft on 04/07/1989
(5) -2.98 ft on 12/26/1993
Show More Low Water Records

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:14
KML Image
Gauge LocationGauge Map Marker
 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
If you notice any errors in the below information, please contact our Webmaster
3.3 Extensive inundation of structures and roads in the area. Evacuations of people or transfer of property to higher ground is likely.
2.29 Some inundation of structures and roads is expected. Evacuations of people or property to higher ground is possible.
1.3 Minimal or no property damage. Minor flooding of low lying roads, campgrounds, boat ramps, docks along the river basin.
0.8 Should water levels continue rising...preparations to protect property should begin.
About This Location Collapse

Latitude: 30.550556° N, Longitude: 81.590000° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 1.3 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 1.97 3.3 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 Mean Higher High Water - used to approximate inundation

Current/Historical Observations:
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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
Jacksonville Weather Forecast Office
13701 Fang Drive
Jacksonville, FL 32218
(904) 741-4370
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