Major Flood
3.3 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
2.3 ft
Minor Flood
1.3 ft
Action Stage
0.8 ft
What Floods at Each Level
3.3 ft
Extensive inundation of structures and roads in the area. Evacuations of people or transfer of property to higher ground is likely.
2.29 ft
Some inundation of structures and roads is expected. Evacuations of people or property to higher ground is possible.
1.3 ft
Minimal or no property damage. Minor flooding of low lying roads, campgrounds, boat ramps, docks along the river basin.
0.8 ft
Should water levels continue rising...preparations to protect property should begin.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Sep 11, 2017 | 4.52 ft | — |
| Nov 10, 2022 | 3.43 ft | — |
| Sep 29, 2022 | 3.02 ft | — |
About This Gauge
Get Flood Alerts for Nassau River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Nassau River near Tisonia (in MHHW)?
The Nassau River near Tisonia (in MHHW) gauge is maintained by USGS (site 02231291) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Nassau River near Tisonia (in MHHW)?
The NWS-defined flood stage for Nassau River near Tisonia (in MHHW) is 1.3 feet. Action stage begins at 0.8 feet. Moderate flooding starts at 2.3 feet, and major flooding at 3.3 feet.
How do I get alerts when Nassau River rises?
Download StormCast free on Google Play, go to River Gauges, and add Nassau River near Tisonia (in MHHW) to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Nassau River near Tisonia (in MHHW) gauge located?
The gauge is located in Duval County, Florida at coordinates 30.5506°N, 81.5900°W. USGS site number: 02231291. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- 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.