St. Johns River above Lake Harney
Flood levels
Official flood levels at this gauge: action stage begins at 6.0 ft; minor flooding begins at 8.0 ft; moderate flooding begins at 9.0 ft; major flooding begins at 10.0 ft.
| Action stage | 6.0 ft |
|---|---|
| Minor flooding | 8.0 ft |
| Moderate flooding | 9.0 ft |
| Major flooding | 10.0 ft |
Highest recorded crests
- 12.7 ft on Oct 3, 2022 (historic crest)
- 11.2 ft on Aug 28, 2008 (historic crest)
- 10.6 ft on Oct 13, 1953 (historic crest)
- 10.5 ft on Sep 19, 2017 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 6.0 ft | No Wake Zones in effect and county parks closed for areas east of Lake Monroe to Lake Harney. |
|---|---|
| 6.5 ft | Minor flooding to a few low lying areas along the river. |
| 7.0 ft | Water approaches boat ramps, docks in Lake Jesup Park and 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. |
| 8.0 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. |
| 8.3 ft | Docks are partially submerged along the river between Lake Harney and Lemon Bluff. |
| 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. |
| 8.8 ft | Water covers Whitcomb Road. |
| 9.0 ft | Water enters the first story of homes on Whitcomb Drive between Crossover Lane and Lake Harney Road. Water covers Mullet Lake Park. |
| 9.3 ft | Many secondary roads are flooded near Lake Harney. Flooding in the Hatbill Road area near Loughman Lake. |
| 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. |
| 10.0 ft | Flooding of homes in low lying areas becomes more significant. Many secondary roads are impassable, limiting access to homes. |
| 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. |
| 10.8 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. |
Forecast office: NWS Melbourne · River Forecast Center: Southeast River Forecast Center.
St. Johns River above Lake Harney in your pocket
Tidora puts this spot on your Home Screen and Lock Screen with free widgets, and sends free flood alerts before the water reaches the levels that matter to you. No account, no subscription needed for either.
Download Tidora on the App Store
Tidora is preparing for launch; these pages go fully live when the app ships.
Nearby stations and gauges
- Econlockhatchee River near Chuluota NWS gauge · 5.4 mi
- Econlockhatchee River near Oviedo NWS gauge · 9.1 mi
- St. Johns River at Lake Jesup Outlet near Sanford NWS gauge · 10.1 mi
- Little Econlockhatchee near Oviedo NWS gauge · 12.3 mi
- Scottsmoor Turnbull Creek Boat Ramp (in MHHW) NWS gauge · 12.4 mi
- Howell Creek at 434 near Oviedo NWS gauge · 13.0 mi