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Hydrograph River at a Glance Download
Susquehanna River at Marietta Stage (ft)Flow (kcfs)Observed: 38.4 ft at 1:00AM Mar 23, 2023Observed: 38.39 ft at 1:30AM Mar 23, 2023Observed: 38.38 ft at 2:00AM Mar 23, 2023Observed: 38.37 ft at 2:30AM Mar 23, 2023Observed: 38.36 ft at 3:00AM Mar 23, 2023Observed: 38.34 ft at 3:30AM Mar 23, 2023Observed: 38.33 ft at 4:00AM Mar 23, 2023Observed: 38.32 ft at 4:30AM Mar 23, 2023Observed: 38.31 ft at 5:00AM Mar 23, 2023Observed: 38.3 ft at 5:30AM Mar 23, 2023Observed: 38.29 ft at 6:00AM Mar 23, 2023Observed: 38.3 ft at 6:30AM Mar 23, 2023Observed: 38.29 ft at 7:00AM Mar 23, 2023Observed: 38.29 ft at 7:30AM Mar 23, 2023Observed: 38.28 ft at 8:00AM Mar 23, 2023Observed: 38.27 ft at 8:30AM Mar 23, 2023Observed: 38.26 ft at 9:00AM Mar 23, 2023Observed: 38.25 ft at 9:30AM Mar 23, 2023Observed: 38.24 ft at 10:00AM Mar 23, 2023Observed: 38.23 ft at 10:30AM Mar 23, 2023Observed: 38.22 ft at 11:00AM Mar 23, 2023Observed: 38.21 ft at 11:30AM Mar 23, 2023Observed: 38.21 ft at 12:00PM Mar 23, 2023Observed: 38.2 ft at 12:30PM Mar 23, 2023Observed: 38.19 ft at 1:00PM Mar 23, 2023Observed: 38.18 ft at 1:30PM Mar 23, 2023Observed: 38.18 ft at 2:00PM Mar 23, 2023Observed: 38.17 ft at 2:30PM Mar 23, 2023Observed: 38.17 ft at 3:00PM Mar 23, 2023Observed: 38.16 ft at 3:30PM Mar 23, 2023Observed: 38.16 ft at 4:00PM Mar 23, 2023Observed: 38.15 ft at 4:30PM Mar 23, 2023Observed: 38.14 ft at 4:31PM Mar 23, 2023Observed: 38.14 ft at 5:00PM Mar 23, 2023Observed: 38.13 ft at 5:30PM Mar 23, 2023Observed: 38.13 ft at 6:00PM Mar 23, 2023Observed: 38.12 ft at 6:30PM Mar 23, 2023Observed: 38.11 ft at 7:00PM Mar 23, 2023Observed: 38.11 ft at 7:30PM Mar 23, 2023Observed: 38.09 ft at 8:00PM Mar 23, 2023Observed: 38.08 ft at 8:30PM Mar 23, 2023Observed: 38.08 ft at 9:00PM Mar 23, 2023Observed: 38.09 ft at 9:30PM Mar 23, 2023Observed: 38.11 ft at 10:00PM Mar 23, 2023Observed: 38.11 ft at 10:30PM Mar 23, 2023Observed: 38.1 ft at 11:00PM Mar 23, 2023Observed: 38.1 ft at 11:30PM Mar 23, 2023Observed: 38.1 ft at 12:00AM Mar 24, 2023Observed: 38.09 ft at 12:30AM Mar 24, 2023Observed: 38.08 ft at 1:00AM Mar 24, 2023Observed: 38.07 ft at 1:30AM Mar 24, 2023Observed: 38.06 ft at 2:00AM Mar 24, 2023Observed: 38.06 ft at 2:30AM Mar 24, 2023Observed: 38.06 ft at 3:00AM Mar 24, 2023Observed: 38.06 ft at 3:30AM Mar 24, 2023Observed: 38.05 ft at 4:00AM Mar 24, 2023Observed: 38.05 ft at 4:30AM Mar 24, 2023Observed: 38.05 ft at 5:00AM Mar 24, 2023Observed: 38.05 ft at 5:30AM Mar 24, 2023Observed: 38.04 ft at 6:00AM Mar 24, 2023Observed: 38.04 ft at 6:30AM Mar 24, 2023Observed: 38.03 ft at 7:00AM Mar 24, 2023Observed: 38.03 ft at 7:30AM Mar 24, 2023Observed: 38.03 ft at 8:00AM Mar 24, 2023Observed: 38.02 ft at 8:30AM Mar 24, 2023Observed: 38.02 ft at 9:00AM Mar 24, 2023Observed: 38.02 ft at 9:30AM Mar 24, 2023Observed: 38.02 ft at 10:00AM Mar 24, 2023Observed: 38.02 ft at 10:30AM Mar 24, 2023Observed: 38.01 ft at 11:00AM Mar 24, 2023Observed: 38.01 ft at 11:30AM Mar 24, 2023Observed: 38.01 ft at 12:00PM Mar 24, 2023Observed: 38 ft at 12:30PM Mar 24, 2023Observed: 38 ft at 1:00PM Mar 24, 2023Observed: 38 ft at 1:30PM Mar 24, 2023Observed: 38 ft at 2:00PM Mar 24, 2023Observed: 38 ft at 2:30PM Mar 24, 2023Observed: 38 ft at 3:00PM Mar 24, 2023Observed: 38 ft at 3:30PM Mar 24, 2023Observed: 37.99 ft at 3:31PM Mar 24, 2023Observed: 37.99 ft at 4:00PM Mar 24, 2023Observed: 37.99 ft at 4:30PM Mar 24, 2023Observed: 37.99 ft at 5:00PM Mar 24, 2023Observed: 37.99 ft at 5:30PM Mar 24, 2023Observed: 37.99 ft at 6:00PM Mar 24, 2023Observed: 37.98 ft at 6:30PM Mar 24, 2023Observed: 37.98 ft at 7:00PM Mar 24, 2023Observed: 37.98 ft at 7:30PM Mar 24, 2023Observed: 37.98 ft at 8:00PM Mar 24, 2023Observed: 37.97 ft at 8:30PM Mar 24, 2023Observed: 37.97 ft at 9:00PM Mar 24, 2023Observed: 37.97 ft at 9:30PM Mar 24, 2023Observed: 37.97 ft at 10:00PM Mar 24, 2023Observed: 37.97 ft at 10:30PM Mar 24, 2023Observed: 37.97 ft at 11:00PM Mar 24, 2023Observed: 37.97 ft at 11:30PM Mar 24, 2023Observed: 37.97 ft at 12:00AM Mar 25, 2023Observed: 37.97 ft at 12:30AM Mar 25, 2023Observed: 37.97 ft at 1:00AM Mar 25, 2023Observed: 37.98 ft at 1:30AM Mar 25, 2023Observed: 37.98 ft at 2:00AM Mar 25, 2023Observed: 37.98 ft at 2:30AM Mar 25, 2023Observed: 37.99 ft at 3:00AM Mar 25, 2023Observed: 37.99 ft at 3:30AM Mar 25, 2023Observed: 37.99 ft at 4:00AM Mar 25, 2023Observed: 38 ft at 4:30AM Mar 25, 2023Observed: 38.01 ft at 5:00AM Mar 25, 2023Observed: 38.01 ft at 5:30AM Mar 25, 2023Observed: 38.02 ft at 6:00AM Mar 25, 2023Observed: 38.03 ft at 6:30AM Mar 25, 2023Observed: 38.03 ft at 7:00AM Mar 25, 2023Observed: 38.04 ft at 7:30AM Mar 25, 2023Observed: 38.05 ft at 8:00AM Mar 25, 2023Observed: 38.07 ft at 8:30AM Mar 25, 2023Observed: 38.07 ft at 9:00AM Mar 25, 2023Observed: 38.08 ft at 9:30AM Mar 25, 2023Observed: 38.08 ft at 10:00AM Mar 25, 2023Observed: 38.1 ft at 10:30AM Mar 25, 2023Observed: 38.13 ft at 11:00AM Mar 25, 2023Observed: 38.13 ft at 11:30AM Mar 25, 2023Observed: 38.14 ft at 12:00PM Mar 25, 2023Observed: 38.16 ft at 12:30PM Mar 25, 2023Observed: 38.17 ft at 1:00PM Mar 25, 2023Observed: 38.18 ft at 1:30PM Mar 25, 2023Observed: 38.19 ft at 2:00PM Mar 25, 2023Observed: 38.2 ft at 2:30PM Mar 25, 2023Observed: 38.21 ft at 3:00PM Mar 25, 2023Observed: 38.23 ft at 3:01PM Mar 25, 2023Observed: 38.23 ft at 3:30PM Mar 25, 2023Observed: 38.25 ft at 4:00PM Mar 25, 2023Observed: 38.27 ft at 4:30PM Mar 25, 2023Observed: 38.29 ft at 5:00PM Mar 25, 2023Observed: 38.3 ft at 5:30PM Mar 25, 2023Observed: 38.32 ft at 6:00PM Mar 25, 2023Observed: 38.34 ft at 6:30PM Mar 25, 2023Observed: 38.36 ft at 7:00PM Mar 25, 2023Observed: 38.38 ft at 7:30PM Mar 25, 2023Observed: 38.4 ft at 8:00PM Mar 25, 2023Observed: 38.42 ft at 8:30PM Mar 25, 2023Observed: 38.45 ft at 9:00PM Mar 25, 2023Observed: 38.47 ft at 9:30PM Mar 25, 2023Observed: 38.49 ft at 10:00PM Mar 25, 2023Observed: 38.5 ft at 10:30PM Mar 25, 2023Observed: 38.53 ft at 11:00PM Mar 25, 2023Observed: 38.55 ft at 11:30PM Mar 25, 2023Observed: 38.56 ft at 12:00AM Mar 26, 2023Highest Observation: 38.58 ft at 12:30AM Mar 26, 2023Forecast: 38.6 ft 2:00AM Mar 26, 2023Forecast: 38.9 ft 8:00AM Mar 26, 2023Forecast: 39.1 ft 2:00PM Mar 26, 2023Forecast: 39.5 ft 8:00PM Mar 26, 2023Forecast: 39.9 ft 2:00AM Mar 27, 2023Forecast: 40.2 ft 8:00AM Mar 27, 2023Forecast: 40.4 ft 2:00PM Mar 27, 2023Forecast: 40.6 ft 8:00PM Mar 27, 2023Highest Forecast: 40.7 ft 2:00AM Mar 28, 2023Highest Forecast: 40.7 ft 8:00AM Mar 28, 2023USGS--Water Resources of the United StatesMRTP1(plotting HGIRG) Graph Created (12:47AM Mar 26, 2023)ObservedForecast (issued 10:38AM Mar 25)Latest observed value: 38.58 ft at 12:30 AM EDT 26-Mar-2023. Flood Stage is 49 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Susquehanna River at Marietta are issued routinely year-round.
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Upstream Gauge - at Harrisburg Upstream Gauge Downstream Gauge Downstream Gauge - at Conowingo Dam
Flood Categories (in feet)
Major Flood Stage: 54
Moderate Flood Stage: 52
Flood Stage: 49
Action Stage: 44
Low Stage (in feet): 0

Historic Crests
(1) 64.54 ft on 06/23/1972
(2) 60.73 ft on 03/19/1936
(3) 58.30 ft on 06/02/1889
(4) 58.16 ft on 09/09/2011
(5) 56.80 ft on 01/21/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 49.61 ft on 12/27/2020 (P)
(2) 50.93 ft on 07/26/2018
(3) 58.16 ft on 09/09/2011
(4) 51.15 ft on 04/29/2011
(5) 52.86 ft on 03/12/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 30.89 ft on 09/26/1932
(2) 31.23 ft on 09/27/1964
(3) 31.35 ft on 11/15/1964
(4) 31.43 ft on 09/04/1966
(5) 31.75 ft on 10/21/1980

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:13
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
64 Widespread flooding on both banks affects homes, businesses, and the water and sewage plants.
59 Widespread flooding occurs on both sides of the river. Many homes and businesses are affected by high water. The Wrightsville water supply is affected by flood waters.
56 Widespread flooding occurs on both sides of the river. Many homes and businesses are affected.
54 Numerous homes and businesses in the Columbia and Wrightsville areas are affected by high water. The Wilton Company in Wrightsville experiences problems with high water.
52 A number of residences in the Wrightsville and Columbia areas begin to be affected.
49 Front Street in Wrightsville floods. Low lying areas of route 624 on the right, or west bank and along route 441 on the left, or east bank are also affected. Riverside recreation area is also inundated.
47 Low lying undeveloped areas on both banks are inundated. A couple of roadways are closed.
44 The right, or west bank overflows. Some roadways are affected.
Photos
(1) looking upstream
(2) view of the gagehouse
(3) looking downstream
About This Location Collapse

Latitude: 40.054444° N, Longitude: 76.531111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 49 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 200.6 ft 249.6 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.
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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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