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This probabilistic forecast is issued by the Ohio River Forecast Center.
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About this graph
Forecasts for the Conemaugh River at Johnstown are issued as needed during times of high water, but are not routinely available.
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Downstream Gauge Downstream Gauge - at Seward
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 34
Moderate Flood Stage: 30
Flood Stage: 28
Action Stage: 23
Low Stage (in feet): 0

Historic Crests
(1) 41.60 ft on 05/31/1889
(2) 39.00 ft on 03/18/1936
(3) 34.00 ft on 07/20/1977
(4) 30.20 ft on 03/29/1924
(5) 25.30 ft on 01/19/1996

(P): Preliminary values subject to further review.

Recent Crests
(1) 25.30 ft on 01/19/1996
(2) 34.00 ft on 07/20/1977
(3) 39.00 ft on 03/18/1936
(4) 30.20 ft on 03/29/1924
(5) 41.60 ft on 05/31/1889

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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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
41.6 Flood of record from 1889.
34 Flood waters begin to reach the Horner Street Bridge.
33.5 Approximate level of the FEMA 0.2% Annual Chance Flood level (500-year flood).
28 Unprotected areas in the vicinity of the river will flood.
26 High water levels should be monitored for contunued rises.
23.5 Approximate level of the FEMA 1% Annual Chance Flood level (100-year flood).
22.5 Flood waters begin to reach the Coopersdale, or Laurel Avenue Bridge.
20.5 Flood waters begin to reach the Fourth Avenue Bridge and the Bethlehem Steel footbridge.
19 Approximate level of the FEMA 2% Annual Chance Flood level (50-year flood).
10.5 Approximate level of the FEMA 10% Annual Chance Flood level (100-year flood).

Other Real-time and/or Archive Data Sources:

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
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

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: 5-Mar-2019 11:43 PM
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