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Weather Forecast Office State College, PA Middle Atlantic River Forecast Center

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Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels
Chance of Exceeding Levels
During Entire Period
Susquehanna River at Harrisburg Observed crest: 4.91 ft at 1:30am Feb 09 Observed: 4.87 ft at 12:00pm Feb 8 Observed: 4.86 ft at 12:30pm Feb 8 Observed: 4.84 ft at 1:00pm Feb 8 Observed: 4.82 ft at 1:30pm Feb 8 Observed: 4.8 ft at 2:00pm Feb 8 Observed: 4.78 ft at 2:30pm Feb 8 Observed: 4.76 ft at 3:00pm Feb 8 Observed: 4.75 ft at 3:30pm Feb 8 Observed: 4.75 ft at 4:00pm Feb 8 Observed: 4.74 ft at 4:30pm Feb 8 Observed: 4.74 ft at 5:00pm Feb 8 Observed: 4.74 ft at 5:30pm Feb 8 Observed: 4.74 ft at 6:00pm Feb 8 Observed: 4.74 ft at 6:30pm Feb 8 Observed: 4.74 ft at 7:00pm Feb 8 Observed: 4.74 ft at 7:30pm Feb 8 Observed: 4.77 ft at 8:00pm Feb 8 Observed: 4.79 ft at 8:30pm Feb 8 Observed: 4.82 ft at 9:00pm Feb 8 Observed: 4.83 ft at 9:30pm Feb 8 Observed: 4.85 ft at 10:00pm Feb 8 Observed: 4.87 ft at 10:30pm Feb 8 Observed: 4.87 ft at 11:00pm Feb 8 Observed: 4.89 ft at 11:30pm Feb 8 Observed: 4.89 ft at 12:00am Feb 9 Observed: 4.9 ft at 12:30am Feb 9 Observed: 4.9 ft at 1:00am Feb 9 Observed: 4.91 ft at 1:30am Feb 9 Observed: 4.91 ft at 2:00am Feb 9 Observed: 4.91 ft at 2:30am Feb 9 Observed: 4.91 ft at 3:00am Feb 9 Observed: 4.91 ft at 3:30am Feb 9 Observed: 4.9 ft at 4:00am Feb 9 Observed: 4.9 ft at 4:30am Feb 9 Observed: 4.9 ft at 5:00am Feb 9 Observed: 4.9 ft at 5:30am Feb 9 Observed: 4.89 ft at 6:00am Feb 9 Observed: 4.88 ft at 6:30am Feb 9 Observed: 4.85 ft at 7:00am Feb 9 Observed: 4.84 ft at 7:30am Feb 9 Observed: 4.82 ft at 8:00am Feb 9 Observed: 4.8 ft at 8:30am Feb 9 Observed: 4.76 ft at 9:00am Feb 9 Observed: 4.72 ft at 9:30am Feb 9 Observed: 4.7 ft at 10:00am Feb 9 Observed: 4.7 ft at 10:30am Feb 9 Observed: 4.69 ft at 11:00am Feb 9 Observed: 4.69 ft at 11:30am Feb 9 Observed: 4.69 ft at 11:31am Feb 9 Observed: 4.69 ft at 11:32am Feb 9 Observed: 4.69 ft at 12:00pm Feb 9 Observed: 4.68 ft at 12:30pm Feb 9 Observed: 4.68 ft at 1:00pm Feb 9 Observed: 4.67 ft at 1:30pm Feb 9 Observed: 4.67 ft at 2:00pm Feb 9 Observed: 4.66 ft at 2:30pm Feb 9 Observed: 4.66 ft at 3:00pm Feb 9 Observed: 4.66 ft at 3:30pm Feb 9 Observed: 4.66 ft at 4:00pm Feb 9 Observed: 4.66 ft at 4:30pm Feb 9 Observed: 4.66 ft at 5:00pm Feb 9 Observed: 4.66 ft at 5:30pm Feb 9 Observed: 4.67 ft at 6:00pm Feb 9 Observed: 4.67 ft at 6:30pm Feb 9 Observed: 4.67 ft at 7:00pm Feb 9 Observed: 4.67 ft at 7:30pm Feb 9 Observed: 4.67 ft at 8:00pm Feb 9 Observed: 4.66 ft at 8:30pm Feb 9 Observed: 4.66 ft at 9:00pm Feb 9 Forecast: 4.69 ft at 1:00pm Feb 9 Forecast: 4.66 ft at 7:00pm Feb 9 Forecast: 4.66 ft at 1:00am Feb 10 Forecast: 4.64 ft at 7:00am Feb 10 Forecast: 4.62 ft at 1:00pm Feb 10 Forecast: 4.58 ft at 7:00pm Feb 10 Forecast: 4.53 ft at 1:00am Feb 11 Forecast: 4.5 ft at 7:00am Feb 11 Forecast: 4.46 ft at 1:00pm Feb 11 Forecast: 4.43 ft at 7:00pm Feb 11 Forecast: 4.4 ft at 1:00am Feb 12 Forecast: 4.38 ft at 7:00am Feb 12 Graph Created (9:58pm Feb 9, 2010) Observed Forecast (issued 9:34am Feb 9)  USGS--Water Resources of the United States HARP1 (plotting HGIRG)   Gage 0  Datum: 290.00 Latest observed value: 4.66 ft at 9:00 PM EST 9-Feb-2010. Flood Stage is 17.0 ft.   Stage (ft) Flow (kcfs)
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NOTE: Forecasts for the Susquehanna River at Harrisburg are issued routinely year-round.

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Upstream Gauge - at Sunbury Upstream Gauge Downstream Gauge Downstream Gauge - at Marietta

Flood Categories (in feet)
Major Flood Stage:23
Moderate Flood Stage:20
Flood Stage:17
Action Stage:11

Historical Crests
(1) 32.57 ft on 06/24/1972
(2) 29.23 ft on 03/19/1936
(3) 26.80 ft on 06/02/1889
(4) 25.70 ft on 05/22/1894
(5) 25.08 ft on 01/20/1996
Show More Historical Crests

Low Water Records
(1) 1.8 ft on 09/13/1964
(2) 2.5 ft on 09/25/1963
(2) 2.5 ft on 11/29/1930
(4) 2.6 ft on 09/28/1959
(5) 2.7 ft on 11/06/1964

Susquehanna River at Harrisburg location map

Flood Impacts & Photos Collapse
32.0 Widespread flooding occurs on both banks. The square and central business district in Harrisburg begin to be affected.
30.0 Widespread flooding occurs on both banks.
28.0 Widespread flooding occurs in the residential sections of Front and Second Streets and in the Shipoke area of Harrisburg.
26.0 Green and Vaughn Streets flood.
24.0 The residential section of Front and Second Streets in Harrisburg flood at this level. Cameron Street in Harrisburg floods due to backwater from Paxton Creek.
23.0 Evacuations are necessary in the Shipoke area of Harrisburg. The water level reaches the corner of Keller and Front Streets.
21.0 Homes on both banks are affected by high water. This is the approximate level of Routes 11 and 15...upstream of the Market Street Bridge.
19.0 A number of homes in West Fairview...Dauphin...and Harrisburg flood.
17.0 Basements of residences and businesses on both banks flood. The parking lot on City Island begins to take on water.
15.0 The recreation area of City Island is evacuated. River interests are encouraged to monitor conditions.
13.0 The recreation area on City Island is evacuated. River interests are encouraged to monitor conditions.
11.0 Recreational use of City Island begins to be curtailed. River interests are encouraged to monitor conditions.
Photos
(1) looking upstream
(2) view of the gagehouse
(3) looking downstream

About This Location Collapse
Latitude: 40.255000° N, Longitude: 76.886000° W, Horizontal Datum: NAD83

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 17 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
Elevation
(gauge height = flood stage)
Elevation information source
NAVD88 N/A N/A Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 290 ft 307 ft Older USGS topographic maps, NGVD29 benchmarks
MSL N/A N/A Older USGS topographic maps, MSL benchmarks
Other N/A N/A  

Other Data Sources:
U.S. Geological Survey (USGS) Data and Site Info for Harrisburg

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Hydrologic Resources
Additional Resources
   

Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

NWS Information
National Weather Service
State College Weather Forecast Office
328 Innovation Boulevard, Suite 330
State College, PA 16803
(814) 231-2408
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Page last modified: 29-Jun-2009 10:11 PM
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