Susquehanna River at Harrisburg

1. 37.00 ftFEMA 0.2% Annual Chance Flood Level (500 year flood).
2. 35.00 ftFlood waters begin to reach the Harvey Taylor Bridge.
3. 33.30 ftFlood of record from Hurricane Agnes in 1972.
4. 32.00 ftWidespread flooding occurs on both banks. The square and central business district in Harrisburg begin to be affected.
5. 30.00 ftWidespread flooding occurs on both banks.
6. 29.00 ftFEMA 1% Annual Chance Flood Level (100-year flood). Flood waters begin to reach the Market Street Bridge.
7. 28.00 ftWidespread flooding occurs in the residential sections of Front and Second Streets and in the Shipoke area of Harrisburg. Flooding reaches Italian Lake Park in Harrisburg.
8. 26.00 ftFEMA 2% Annual Chance Flood Level (50-year flood). Flood waters begin to reach the Walnut Street Bridge. Green and Vaughn Streets flood.
9. 24.00 ftThe residential section of Front and Second Streets in Harrisburg flood at this level. Cameron Street in Harrisburg floods due to backwater from Paxton Creek.
10. 23.00 ftEvacuations are necessary in the Shipoke area of Harrisburg. Listen to local emergency officials for specific details. The water level reaches the corner of Kelker and Front Streets. Delaware Street, Geiger Street and Maclay Streets may also be impacted.
11. 22.50 ftUS 22/322 in the vicinity of the Dauphin Narrows is impacted by flood waters.
12. 21.00 ftHomes on both banks are affected by high water. This is the approximate level of Routes 11 and 15, upstream of the Market Street Bridge. Flood waters begin to reach South Main Street in Marysville.
13. 20.50 ftFEMA 10% Annual Chance Flood Level (10-year flood).
14. 20.00 ftRiverfront Park in Harrisburg begins to flood.
15. 19.00 ftA number of homes in West Fairview, Dauphin, and Harrisburg flood. Flood waters begin to reach Front Street in East Pennsboro Township in Cumberland County.
16. 17.00 ftBasements of residences and businesses on both banks flood. The parking lot on City Island begins to take on water.
17. 15.00 ftThe recreation area of City Island is evacuated. River interests are encouraged to monitor conditions.
18. 13.00 ftThe recreation area on City Island is evacuated. River interests are encouraged to monitor conditions.
19. 11.00 ftRecreational use of City Island begins to be curtailed. River interests are encouraged to monitor conditions.

Chance of flooding, September to November

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.

Most recent crests

• July 26, 2018: 17.32 ft
• September 9, 2011: 25.17 ft
• April 29, 2011: 18.39 ft
• March 12, 2011: 20.09 ft
• June 29, 2006: 19.66 ft
• April 4, 2005: 18.87 ft
• March 30, 2005: 17.43 ft
• September 19, 2004: 24.40 ft
• January 10, 1998: 17.30 ft
• January 21, 1996: 24.66 ft

• UpstreamSusquehanna River at Sunbury
• DownstreamSusquehanna River at Marietta
• Paxton Creek at Cameron
• Yellow Breeches Creek at Camp Hill
• Paxton Creek at Glenwood
• Conodoguinet Creek at Hogestown
• Swatara Creek at Middletown
• Fishing Creek at Goldsboro
• Swatara Creek at Hershey
• Conewago Creek at Falmouth

Forecasts by the Middle Atlantic River Forecast Center. Forecasts are issued routinely year-round. Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.