Susquehanna River at Sunbury, PA
River level and flood forecast · Snyder County
The river is 15.9 ft below flood stage (24 ft).
Forecast to hold near 8.1 ft through Thu, Oct 15, 2 PM.
Flow: 13,200 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 2:51 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 34 ft |
| Moderate flood stage | 26 ft |
| Flood stage | 24 ft |
| Action stage | 20 ft |
| Record crest (June 24, 1972) | 35.8 ft |
What floods at each level
From the National Weather Service, highest first.
- 35 ftWidespread catastrophic flooding occurs in areas outside the flood wall and levee system. This is the design height of the flood protection works anround Sunbury.
- 34 ftMost areas adjacent to the river, which are not protected by the flood wall and levee system, are affected by high water. Catasrophic flooding occurs in some of these areas.
- 32 ftWidespread flooding occurs in areas not protected by the flood wall and levee system. Many homes and businesses are affected.
- 30 ftWidespread flooding occurs in areas not protected by the flood wall and levee system. Many homes and businesses are affected.
- 28 ftWidespread flooding occurs in areas not protected by the flood wall and levee system. Many homes and businesses are affected.
- 26 ftHigh water affects a number of homes and businesses in areas not protected by the flood wall and levee system.
- 24 ftBoth banks overflow. Areas not protected by the flood wall and levee system are affected.
- 22 ftRiver interests are encouraged to monitor conditions for further rises.
- 20 ftRiver interests are encouraged to monitor conditions for further rises. Shikellamy State Park closed due to high water.
Highest crests on record
- 35.8 ft — June 24, 1972
- 31.66 ft — September 9, 2011
- 30.62 ft — September 27, 1975
- 30.44 ft — September 19, 2004
- 30.32 ft — January 20, 1996
Recent crests: 21.17 ft (September 12, 2018) · 21.73 ft (August 15, 2018) · 22.16 ft (July 26, 2018) · 31.66 ft (September 9, 2011) · 25.58 ft (April 29, 2011)
Up and down the river, and nearby
- UpstreamSusquehanna River at Danville, PA
- DownstreamSusquehanna River at Harrisburg, PA
- Susquehanna River at Sunbury above Dam, PA
- West Branch Susquehanna River at Lewisburg, PA
- Chillisquaque Creek near Potts Grove, PA
- Penns Creek at Penns Creek, PA
- West Branch Susquehanna River at West Milton, PA
- East Mahantango Creek near Dalmatia, PA
- Chillisquaque Creek at Washingtonville, PA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SBYP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.