Lynches River at Effingham, SC
River level and flood forecast · Florence County
Normal2.5 ftas of Mon 4 PM
The river is 11.5 ft below flood stage (14 ft).
Flow: 245 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 18 ft |
| Moderate flood stage | 16 ft |
| Flood stage | 14 ft |
| Action stage | 11 ft |
| Record crest (September 22, 1945) | 21.21 ft |
What floods at each level
From the National Weather Service, highest first.
- 21 ftNear record flooding will occur.
- 18 ftExtensive flooding will occur.
- 17.5 ftExtensive flooding will occur along the river. In addition, flood waters will affect some residential areas up stream near the Sumter County line.
- 16.5 ftWater will enter some homes along Roundtree Road. Several homes will be isolated along North Old Georgetown, Roundtree, and Bengause Roads near Effingham and New Hope.
- 16 ftFlood waters will affect several homes along the river and isolate those residents without boats.
- 15.5 ftFlood waters will affect portions of North Old Georgetown, Roundtree and Bengause Roads near Effingham and New Hope. The roads will be impassable in places.
- 15 ftFlood waters will affect roads near Effingham and New Hope. North Old Georgetown, Roundtree and Bengause Roads will flood in low lying areas near the river.
- 14 ftFlooding will affect low lying areas along the river.
Highest crests on record
- 21.21 ft — September 22, 1945
- 20 ft — August 30, 1908
- 19.7 ft — October 6, 2015
- 19.4 ft — September 20, 1928
- 19.4 ft — September 24, 1928
Recent crests: 9.46 ft (October 14, 2025) · 10.06 ft (March 25, 2025) · 15.74 ft (August 14, 2024) · 15.58 ft (August 9, 2024) · 13.18 ft (March 9, 2024)
Up and down the river, and nearby
- UpstreamLynches River at I-95, SC
- DownstreamLynches River at US 378 near Lake City, SC
- Jeffries Creek at James Jones Ave, SC
- Black Creek (SC) near Quinby, SC
- Pee Dee River below Pee Dee - 4 Miles South, SC
- Pee Dee River at Pee Dee, SC
- Pee Dee River at Interstate 95 near Florence, SC
- Pee Dee River above Poston at US 378, SC
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (EFFS1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.