Susquehanna River at Harrisburg, PA
River level and flood forecast · Dauphin County
Normal4.7 ftas of Mon 4 PM
The river is 12.3 ft below flood stage (17 ft).
Forecast to fall to 4.0 ft by Thu, Oct 15, 2 PM.
Flow: 29,400 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 | 23 ft |
| Moderate flood stage | 20 ft |
| Flood stage | 17 ft |
| Action stage | 11 ft |
| Record crest (June 24, 1972) | 33.27 ft |
What floods at each level
From the National Weather Service, highest first.
- 37 ftFEMA 0.2% Annual Chance Flood Level (500 year flood).
- 35 ftFlood waters begin to reach the Harvey Taylor Bridge.
- 33.3 ftFlood of record from Hurricane Agnes in 1972.
- 32 ftWidespread flooding occurs on both banks. The square and central business district in Harrisburg begin to be affected.
- 30 ftWidespread flooding occurs on both banks.
- 29 ftFEMA 1% Annual Chance Flood Level (100-year flood). Flood waters begin to reach the Market Street Bridge.
- 28 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.
- 26 ftFEMA 2% Annual Chance Flood Level (50-year flood). Flood waters begin to reach the Walnut Street Bridge. Green and Vaughn Streets flood.
- 24 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.
- 23 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.
- 22.5 ftUS 22/322 in the vicinity of the Dauphin Narrows is impacted by flood waters.
- 21 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.
- 20.5 ftFEMA 10% Annual Chance Flood Level (10-year flood).
- 20 ftRiverfront Park in Harrisburg begins to flood.
- 19 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.
- 17 ftBasements of residences and businesses on both banks flood. The parking lot on City Island begins to take on water.
- 15 ftThe recreation area of City Island is evacuated. River interests are encouraged to monitor conditions.
- 13 ftThe recreation area on City Island is evacuated. River interests are encouraged to monitor conditions.
- 11 ftRecreational use of City Island begins to be curtailed. River interests are encouraged to monitor conditions.
Highest crests on record
- 33.27 ft — June 24, 1972
- 29.23 ft — March 19, 1936
- 26.8 ft — June 2, 1889
- 25.7 ft — May 22, 1894
- 25.17 ft — September 9, 2011
Recent crests: 17.32 ft (July 26, 2018) · 25.17 ft (September 9, 2011) · 18.39 ft (April 29, 2011) · 20.09 ft (March 12, 2011) · 19.66 ft (June 29, 2006)
Up and down the river, and nearby
- UpstreamSusquehanna River at Sunbury, PA
- DownstreamSusquehanna River at Marietta, PA
- Yellow Breeches Creek near Camp Hill, PA
- Paxton Creek near Glenwood, PA
- Conodoguinet Creek near Hogestown, PA
- Swatara Creek at Middletown, PA
- Swatara Creek near Hershey, PA
- Conewago Creek near Falmouth, PA
- Swatara Creek near Palmyra, PA
- West Conewago Creek near Manchester, PA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (HARP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.