Major Flood
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 ft
Minor Flood
1.5 ft
Action Stage
1 ft
What Floods at Each Level
2.9 ft
Major Flooding - 2.9 feet above MHHW - Extensive inundation of structures and roads in the area is expected. Evacuations of people or transfer of property to higher ground is likely and the advice of Emergency Management should be heeded.
1.9 ft
Moderate Flooding - 1.9 feet above MHHW - Some flooding of structures and roads along the St. Johns River and other inland waterways is expected. Evacuation of people or property to higher ground is possible and the advice of Emergency Management or local officials should be heeded.
1.4 ft
Minor Flooding - 1.4 feet above MHHW - Flooding of low lying areas...city parks and normally flood prone roadways is likely. Some boat ramps and docks along the St. Johns River and other inland waterways will begin to flood.
0.9 ft
Action Stage - 0.9 feet above MHHW - Minor Flooding possible. Should water levels continue rising...preparations to protect property should begin. Flooding may begin to impact low lying roads along Hogan Creek behind the Maxwell House Coffee Plant.
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 |
|---|---|---|
| Oct 12, 1846 | 6 ft | — |
| Sep 11, 2017 | 4.41 ft | — |
| Sep 8, 1964 | 3.49 ft | — |
About This Gauge
Get Flood Alerts for St. Johns 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 St. Johns River at Jacksonville (in MHHW)?
The St. Johns River at Jacksonville (in MHHW) gauge is maintained by USGS (site 02246500) 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 St. Johns River at Jacksonville (in MHHW)?
The NWS-defined flood stage for St. Johns River at Jacksonville (in MHHW) is 1.5 feet. Action stage begins at 1 feet. Moderate flooding starts at 2 feet, and major flooding at 3 feet.
How do I get alerts when St. Johns River rises?
Download StormCast free on Google Play, go to River Gauges, and add St. Johns River at Jacksonville (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 St. Johns River at Jacksonville (in MHHW) gauge located?
The gauge is located in Duval County, Florida at coordinates 30.3222°N, 81.6656°W. USGS site number: 02246500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on St. Johns River
St. Johns River at Astor
St. Johns River at Buckman Bridge (I-295) (in MHHW)
St. Johns River at Buckman Bridge (I-295) (in MHHW)
St. Johns River near Cocoa
St. Johns River near Deland
St. Johns River at Dames Point Bridge (I-295) (in MHHW)
St. Johns River at Dames Point Bridge (I-295) (in MHHW)
St. Johns River at Shands Bridge (in MHHW)
On This River
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.
- Coastal flood impacts are dependent upon waves as well as tide level. High waves can result in flooding even if the tide level is below flood stage.