Major Flood
10 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
9 ft
Minor Flood
8 ft
Action Stage
6 ft
What Floods at Each Level
10.8 ft
Water covers State Road 46 and it may become impassable near Jungle Road and Prevatt Road. Standing water on secondary roads near the river deepens to more than three feet in some areas. Flooding becomes more significant to structures and marinas from above Lake Harney to the Lake Jesup area.
10.5 ft
Water covers many secondary roads near the river, limiting access to homes to boats or high terrain vehicles. Flooding of homes along secondary roads near the river becomes more significant. Water begins to encroach on State Road 46 near Jungle Road and Prevatt Road.
10 ft
Flooding of homes in low lying areas becomes more significant. Many secondary roads are impassable, limiting access to homes.
9.5 ft
Water begins to move into homes in low lying areas along the river. Flooding around the Black Hammock area near Lake Jesup.
9.3 ft
Many secondary roads are flooded near Lake Harney. Flooding in the Hatbill Road area near Loughman Lake.
9 ft
Water enters the first story of homes on Whitcomb Drive between Crossover Lane and Lake Harney Road. Water covers Mullet Lake Park.
8.8 ft
Water covers Whitcomb Road.
8.5 ft
Water surrounds homes on stilts on Prevatt road, entering garages on the first story. Water fills yards and ditches along Whitcomb Drive and Lake Harney Road. Roads flood in the Palm Shores and Mullet Lake areas.
8.3 ft
Docks are partially submerged along the river between Lake Harney and Lemon Bluff.
8 ft
Water moves into yards on Prevatt Road off State Road 46 near Lake Harney. Flooding of boat ramps and roads occurs in Mullet Lake Park.
7.5 ft
Some docks, islands and small trees along the river north of Lake Harney will be covered with water, making boating hazardous.
7 ft
Water approaches boat ramps, docks in Lake Jesup Park and Mullet Lake Park.
6.5 ft
Minor flooding to a few low lying areas along the river.
6 ft
No Wake Zones in effect and county parks closed for areas east of Lake Monroe to Lake Harney.
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 3, 2022 | 12.67 ft | 19,816 cfs |
| Aug 27, 2008 | 11.15 ft | — |
| Oct 12, 1953 | 10.62 ft | — |
About This Gauge
USGS Site
NWS LID
GENF1
River
St. Johns River
County
Seminole, FL
Coordinates
28.7139°N, 81.0356°W
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 above Lake Harney?
The St. Johns River above Lake Harney gauge is maintained by USGS (site 02234000) 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 above Lake Harney?
The NWS-defined flood stage for St. Johns River above Lake Harney is 8 feet. Action stage begins at 6 feet. Moderate flooding starts at 9 feet, and major flooding at 10 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 above Lake Harney 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 above Lake Harney gauge located?
The gauge is located in Seminole County, Florida at coordinates 28.7139°N, 81.0356°W. USGS site number: 02234000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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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
Downstream: St. Johns River near Sanford
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- 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.