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Hydrograph River at a Glance Download  
Clarion River at Johnsonburg Observed crest: 2.31 ft at 3:30pm Feb 07 Observed: 2.07 ft at 10:00pm Feb 6 Observed: 2.05 ft at 10:30pm Feb 6 Observed: 2.04 ft at 11:00pm Feb 6 Observed: 2 ft at 11:30pm Feb 6 Observed: 2 ft at 12:00am Feb 7 Observed: 2 ft at 12:30am Feb 7 Observed: 2 ft at 1:00am Feb 7 Observed: 1.99 ft at 1:30am Feb 7 Observed: 1.98 ft at 2:00am Feb 7 Observed: 1.97 ft at 2:30am Feb 7 Observed: 1.96 ft at 3:00am Feb 7 Observed: 1.95 ft at 3:30am Feb 7 Observed: 1.93 ft at 4:00am Feb 7 Observed: 1.92 ft at 4:30am Feb 7 Observed: 1.91 ft at 5:00am Feb 7 Observed: 1.9 ft at 5:30am Feb 7 Observed: 1.89 ft at 6:00am Feb 7 Observed: 1.87 ft at 6:30am Feb 7 Observed: 1.85 ft at 7:00am Feb 7 Observed: 1.84 ft at 7:30am Feb 7 Observed: 1.82 ft at 8:00am Feb 7 Observed: 1.82 ft at 8:30am Feb 7 Observed: 1.82 ft at 9:00am Feb 7 Observed: 1.82 ft at 9:30am Feb 7 Observed: 1.83 ft at 10:00am Feb 7 Observed: 1.83 ft at 10:30am Feb 7 Observed: 1.83 ft at 11:00am Feb 7 Observed: 1.86 ft at 11:30am Feb 7 Observed: 1.94 ft at 12:00pm Feb 7 Observed: 1.98 ft at 12:30pm Feb 7 Observed: 2.02 ft at 1:00pm Feb 7 Observed: 2.04 ft at 1:30pm Feb 7 Observed: 2.1 ft at 2:00pm Feb 7 Observed: 2.14 ft at 2:30pm Feb 7 Observed: 2.25 ft at 3:00pm Feb 7 Observed: 2.31 ft at 3:30pm Feb 7 Observed: 2.28 ft at 4:00pm Feb 7 Observed: 2.24 ft at 4:30pm Feb 7 Observed: 2.25 ft at 5:00pm Feb 7 Observed: 2.24 ft at 5:30pm Feb 7 Observed: 2.23 ft at 6:00pm Feb 7 Observed: 2.23 ft at 6:30pm Feb 7 Observed: 2.23 ft at 7:00pm Feb 7 Observed: 2.22 ft at 7:30pm Feb 7 Observed: 2.21 ft at 8:00pm Feb 7 Observed: 2.21 ft at 8:30pm Feb 7 Observed: 2.2 ft at 9:00pm Feb 7 Observed: 2.2 ft at 9:30pm Feb 7 Observed: 2.2 ft at 10:00pm Feb 7 Observed: 2.2 ft at 10:30pm Feb 7 Observed: 2.19 ft at 11:00pm Feb 7 Observed: 2.16 ft at 11:30pm Feb 7 Observed: 2.13 ft at 12:00am Feb 8 Observed: 2.12 ft at 12:30am Feb 8 Observed: 2.11 ft at 1:00am Feb 8 Observed: 2.1 ft at 1:30am Feb 8 Observed: 2.09 ft at 2:00am Feb 8 Observed: 2.08 ft at 2:30am Feb 8 Observed: 2.07 ft at 3:00am Feb 8 Observed: 2.06 ft at 3:30am Feb 8 Observed: 2.06 ft at 4:00am Feb 8 Observed: 2.05 ft at 4:30am Feb 8 Observed: 2.05 ft at 5:00am Feb 8 Observed: 2.05 ft at 5:30am Feb 8 Observed: 2.04 ft at 6:00am Feb 8 Observed: 2.03 ft at 6:30am Feb 8 Observed: 2.03 ft at 7:00am Feb 8 Observed: 2.03 ft at 7:30am Feb 8 Observed: 2.03 ft at 8:00am Feb 8 Observed: 2.01 ft at 8:30am Feb 8 Observed: 2 ft at 9:00am Feb 8 Observed: 2 ft at 9:30am Feb 8 Observed: 2 ft at 10:00am Feb 8 Observed: 1.99 ft at 10:30am Feb 8 Observed: 2 ft at 11:00am Feb 8 Observed: 2 ft at 11:30am Feb 8 Observed: 2.04 ft at 12:00pm Feb 8 Observed: 2.07 ft at 12:30pm Feb 8 Observed: 2.09 ft at 1:00pm Feb 8 Observed: 2.15 ft at 1:30pm Feb 8 Observed: 2.17 ft at 2:00pm Feb 8 Observed: 2.16 ft at 2:30pm Feb 8 Observed: 2.17 ft at 3:00pm Feb 8 Observed: 2.21 ft at 3:30pm Feb 8 Observed: 2.23 ft at 4:00pm Feb 8 Observed: 2.21 ft at 4:30pm Feb 8 Observed: 2.2 ft at 5:00pm Feb 8 Observed: 2.19 ft at 5:30pm Feb 8 Observed: 2.17 ft at 6:00pm Feb 8 Observed: 2.16 ft at 6:30pm Feb 8 Observed: 2.15 ft at 7:00pm Feb 8 Observed: 2.15 ft at 7:30pm Feb 8 Observed: 2.14 ft at 8:00pm Feb 8 Observed: 2.13 ft at 8:30pm Feb 8 Observed: 2.13 ft at 9:00pm Feb 8 Observed: 2.12 ft at 9:30pm Feb 8 Observed: 2.11 ft at 10:00pm Feb 8 Observed: 2.11 ft at 10:30pm Feb 8 Observed: 2.11 ft at 11:00pm Feb 8 Observed: 2.1 ft at 11:30pm Feb 8 Observed: 2.09 ft at 12:00am Feb 9 Observed: 2.08 ft at 12:30am Feb 9 Observed: 2.07 ft at 1:00am Feb 9 Observed: 2.07 ft at 1:30am Feb 9 Observed: 2.07 ft at 2:00am Feb 9 Observed: 2.07 ft at 2:30am Feb 9 Observed: 2.07 ft at 3:00am Feb 9 Observed: 2.07 ft at 3:30am Feb 9 Observed: 2.07 ft at 4:00am Feb 9 Observed: 2.07 ft at 4:30am Feb 9 Observed: 2.07 ft at 5:00am Feb 9 Observed: 2.07 ft at 5:30am Feb 9 Observed: 2.08 ft at 6:00am Feb 9 Observed: 2.09 ft at 6:30am Feb 9 Observed: 2.09 ft at 7:00am Feb 9 Observed: 2.09 ft at 7:30am Feb 9 Observed: 2.1 ft at 8:00am Feb 9 Observed: 2.1 ft at 8:30am Feb 9 Observed: 2.1 ft at 9:00am Feb 9 Observed: 2.09 ft at 9:30am Feb 9 Observed: 2.06 ft at 10:00am Feb 9 Observed: 2.04 ft at 10:30am Feb 9 Observed: 2.03 ft at 11:00am Feb 9 Observed: 2.03 ft at 11:30am Feb 9 Observed: 2.03 ft at 12:00pm Feb 9 Observed: 2.03 ft at 12:30pm Feb 9 Observed: 2.04 ft at 1:00pm Feb 9 Observed: 2.05 ft at 1:30pm Feb 9 Observed: 2.05 ft at 2:00pm Feb 9 Observed: 2.06 ft at 2:30pm Feb 9 Observed: 2.06 ft at 3:00pm Feb 9 Observed: 2.06 ft at 3:30pm Feb 9 Observed: 2.06 ft at 4:00pm Feb 9 Observed: 2.06 ft at 4:30pm Feb 9 Observed: 2.06 ft at 5:00pm Feb 9 Observed: 2.06 ft at 5:30pm Feb 9 Observed: 2.05 ft at 6:00pm Feb 9 Observed: 2.05 ft at 6:30pm Feb 9 Observed: 2.04 ft at 7:00pm Feb 9 Observed: 2.04 ft at 7:30pm Feb 9 Observed: 2.04 ft at 8:00pm Feb 9 Observed: 2.03 ft at 8:30pm Feb 9 Graph Created (9:58pm Feb 9, 2010) Observed USGS--Water Resources of the United States JHNP1 (plotting HGIRG) Gage 0 Datum: 1423.00 Latest observed value: 2.03 ft at 8:30 PM EST 9-Feb-2010. Flood Stage is 7.0 ft. Stage (ft) Flow (kcfs)
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NOTE: Forecasts for the Clarion River at Johnsonburg are issued as needed during times of high water, but are not routinely available.

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Downstream Gauge Downstream Gauge - at Ridgway

Flood Categories (in feet)
Major Flood Stage:10
Moderate Flood Stage:9
Flood Stage:7
Action Stage:5

Historical Crests
(1) 16.70 ft on 07/01/1942
(2) 12.60 ft on 01/19/1996
(3) 9.99 ft on 06/22/1972
(4) 9.86 ft on 06/20/1989
(5) 9.20 ft on 05/28/1946
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Low Water Records
(1) 0.7 ft on 09/18/1952

 Clarion River at Johnsonburg location map

Flood Impacts Collapse
10.0 A number of homes flood. Travel is restricted on Route 219.
9.0 Water level reaches Route 210. Several homes are affected by high water.
7.0 High water results in overflow of both banks.

About This Location Collapse
Latitude: 41.486000° N, Longitude: 78.679000° W, Horizontal Datum: NAD83

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 7 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 1423 ft 1430 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 Johnsonburg

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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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