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This probabilistic forecast is issued by the Middle Atlantic River Forecast Center.
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About this graph
Forecasts for the Juniata River at Mapleton Depot are issued routinely year-round.
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Upstream Gauge - at Huntingdon Upstream Gauge Downstream Gauge Downstream Gauge - at Lewistown
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 26
Moderate Flood Stage: 24
Flood Stage: 20
Action Stage: 15
Low Stage (in feet): 0

Historic Crests
(1) 38.20 ft on 03/18/1936
(2) 33.07 ft on 06/23/1972
(3) 26.40 ft on 11/25/1950
(4) 23.76 ft on 09/18/2004
(5) 22.47 ft on 01/20/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 23.76 ft on 09/18/2004
(2) 22.47 ft on 01/20/1996
(3) 18.33 ft on 02/15/1984
(4) 33.07 ft on 06/23/1972
(5) 20.76 ft on 04/03/1970
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 1.13 ft on 09/13/1963
(2) 1.19 ft on 01/15/1956
(3) 1.19 ft on 11/14/1957
(4) 1.30 ft on 10/12/1953
(5) 1.35 ft on 10/02/1938
KML Image
Gauge LocationGauge Map Marker
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
30 Widespread flooding occurs in the Mapleton area.
28 Numerous homes and businesses in the Mapleton area are flooded. High water inundates the approaches to the bridge connecting Mapleton with Route 22.
26 Many homes on the right, or south bank are affected. The approaches of the highway bridge connecting Mapleton with Route 22 are inundated.
24 The right, or south bank overflows. High water affects homes on the right bank near the gage. The glass plant upstream of the gage on the left bank is also flooded.
22 The left, or north bank overflows into low lying areas. Route 22 is threatened.
20 The left or north bank overflows into low lying areas.
(1) looking upstream
(2) view of the gagehouse
(3) looking downstream

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.

ESP Expected Values plot
Probabilistic QPF Trace Ensemble
River Level Exceedence Chart
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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