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Hydrograph River at a Glance Download
Portage River at Woodville Stage (ft)Flow (kcfs)Observed: 6.55 ft at 1:00PM Feb 27, 2021Observed: 6.59 ft at 1:30PM Feb 27, 2021Observed: 6.63 ft at 2:00PM Feb 27, 2021Observed: 6.68 ft at 2:30PM Feb 27, 2021Observed: 6.72 ft at 3:00PM Feb 27, 2021Observed: 6.77 ft at 3:30PM Feb 27, 2021Observed: 6.83 ft at 4:00PM Feb 27, 2021Observed: 6.89 ft at 4:30PM Feb 27, 2021Observed: 6.95 ft at 5:00PM Feb 27, 2021Observed: 7.01 ft at 5:30PM Feb 27, 2021Observed: 7.08 ft at 6:00PM Feb 27, 2021Observed: 7.15 ft at 6:30PM Feb 27, 2021Observed: 7.22 ft at 7:00PM Feb 27, 2021Observed: 7.28 ft at 7:30PM Feb 27, 2021Observed: 7.34 ft at 8:00PM Feb 27, 2021Observed: 7.41 ft at 8:30PM Feb 27, 2021Observed: 7.47 ft at 9:00PM Feb 27, 2021Observed: 7.53 ft at 9:30PM Feb 27, 2021Observed: 7.58 ft at 10:00PM Feb 27, 2021Observed: 7.63 ft at 10:30PM Feb 27, 2021Observed: 7.68 ft at 11:00PM Feb 27, 2021Observed: 7.73 ft at 11:30PM Feb 27, 2021Observed: 7.77 ft at 12:00AM Feb 28, 2021Observed: 7.8 ft at 12:30AM Feb 28, 2021Observed: 7.84 ft at 1:00AM Feb 28, 2021Observed: 7.88 ft at 1:30AM Feb 28, 2021Observed: 7.91 ft at 2:00AM Feb 28, 2021Observed: 7.94 ft at 2:30AM Feb 28, 2021Observed: 7.96 ft at 3:00AM Feb 28, 2021Observed: 7.98 ft at 3:30AM Feb 28, 2021Observed: 8.01 ft at 4:00AM Feb 28, 2021Observed: 8.03 ft at 4:30AM Feb 28, 2021Observed: 8.05 ft at 5:00AM Feb 28, 2021Observed: 8.07 ft at 5:30AM Feb 28, 2021Observed: 8.08 ft at 6:00AM Feb 28, 2021Observed: 8.09 ft at 6:30AM Feb 28, 2021Observed: 8.11 ft at 7:00AM Feb 28, 2021Observed: 8.11 ft at 7:30AM Feb 28, 2021Observed: 8.12 ft at 8:00AM Feb 28, 2021Highest Observation: 8.13 ft at 8:30AM Feb 28, 2021Highest Observation: 8.13 ft at 9:00AM Feb 28, 2021Observed: 8.12 ft at 9:30AM Feb 28, 2021Highest Observation: 8.13 ft at 10:00AM Feb 28, 2021Observed: 8.12 ft at 10:30AM Feb 28, 2021Observed: 8.11 ft at 11:00AM Feb 28, 2021Observed: 8.11 ft at 11:30AM Feb 28, 2021Observed: 8.1 ft at 12:00PM Feb 28, 2021Observed: 8.09 ft at 12:30PM Feb 28, 2021Observed: 8.08 ft at 1:00PM Feb 28, 2021Observed: 8.06 ft at 1:30PM Feb 28, 2021Observed: 8.04 ft at 2:00PM Feb 28, 2021Observed: 8.03 ft at 2:30PM Feb 28, 2021Observed: 8.01 ft at 3:00PM Feb 28, 2021Observed: 7.99 ft at 3:30PM Feb 28, 2021Observed: 7.97 ft at 4:00PM Feb 28, 2021Observed: 7.95 ft at 4:30PM Feb 28, 2021Observed: 7.93 ft at 5:00PM Feb 28, 2021Observed: 7.91 ft at 5:30PM Feb 28, 2021Observed: 7.89 ft at 6:00PM Feb 28, 2021Observed: 7.87 ft at 6:30PM Feb 28, 2021Observed: 7.85 ft at 7:00PM Feb 28, 2021Observed: 7.83 ft at 7:30PM Feb 28, 2021Observed: 7.81 ft at 8:00PM Feb 28, 2021Observed: 7.79 ft at 8:30PM Feb 28, 2021Observed: 7.77 ft at 9:00PM Feb 28, 2021Observed: 7.75 ft at 9:30PM Feb 28, 2021Observed: 7.73 ft at 10:00PM Feb 28, 2021Observed: 7.7 ft at 10:30PM Feb 28, 2021Observed: 7.68 ft at 11:00PM Feb 28, 2021Observed: 7.67 ft at 11:30PM Feb 28, 2021Observed: 7.65 ft at 12:00AM Mar 01, 2021Observed: 7.63 ft at 12:30AM Mar 01, 2021Observed: 7.61 ft at 1:00AM Mar 01, 2021Observed: 7.6 ft at 1:30AM Mar 01, 2021Observed: 7.58 ft at 2:00AM Mar 01, 2021Observed: 7.57 ft at 2:30AM Mar 01, 2021Observed: 7.55 ft at 3:00AM Mar 01, 2021Observed: 7.55 ft at 3:30AM Mar 01, 2021Observed: 7.54 ft at 4:00AM Mar 01, 2021Observed: 7.53 ft at 4:30AM Mar 01, 2021Observed: 7.52 ft at 5:00AM Mar 01, 2021Observed: 7.51 ft at 5:30AM Mar 01, 2021Observed: 7.5 ft at 6:00AM Mar 01, 2021Observed: 7.49 ft at 6:30AM Mar 01, 2021Observed: 7.48 ft at 7:00AM Mar 01, 2021Observed: 7.47 ft at 7:30AM Mar 01, 2021Observed: 7.46 ft at 8:00AM Mar 01, 2021Observed: 7.45 ft at 8:30AM Mar 01, 2021Observed: 7.44 ft at 9:00AM Mar 01, 2021Observed: 7.43 ft at 9:30AM Mar 01, 2021Observed: 7.41 ft at 10:00AM Mar 01, 2021Observed: 7.39 ft at 10:30AM Mar 01, 2021Observed: 7.37 ft at 11:00AM Mar 01, 2021Observed: 7.35 ft at 11:30AM Mar 01, 2021Observed: 7.33 ft at 12:00PM Mar 01, 2021Observed: 7.31 ft at 12:30PM Mar 01, 2021Observed: 7.29 ft at 1:00PM Mar 01, 2021Observed: 7.26 ft at 1:30PM Mar 01, 2021Observed: 7.24 ft at 2:00PM Mar 01, 2021Observed: 7.21 ft at 2:30PM Mar 01, 2021Observed: 7.18 ft at 3:00PM Mar 01, 2021Observed: 7.14 ft at 3:30PM Mar 01, 2021Observed: 7.11 ft at 4:00PM Mar 01, 2021Observed: 7.07 ft at 4:30PM Mar 01, 2021Observed: 7.03 ft at 5:00PM Mar 01, 2021Observed: 7 ft at 5:30PM Mar 01, 2021Observed: 6.95 ft at 6:00PM Mar 01, 2021Observed: 6.91 ft at 6:30PM Mar 01, 2021Observed: 6.86 ft at 7:00PM Mar 01, 2021Observed: 6.82 ft at 7:30PM Mar 01, 2021Observed: 6.78 ft at 8:00PM Mar 01, 2021Observed: 6.72 ft at 8:30PM Mar 01, 2021Observed: 6.68 ft at 9:00PM Mar 01, 2021Observed: 6.63 ft at 9:30PM Mar 01, 2021Observed: 6.58 ft at 10:00PM Mar 01, 2021Observed: 6.53 ft at 10:30PM Mar 01, 2021Observed: 6.49 ft at 11:00PM Mar 01, 2021Observed: 6.44 ft at 11:30PM Mar 01, 2021Observed: 6.39 ft at 12:00AM Mar 02, 2021Observed: 6.34 ft at 12:30AM Mar 02, 2021Observed: 6.3 ft at 1:00AM Mar 02, 2021Observed: 6.25 ft at 1:30AM Mar 02, 2021Observed: 6.21 ft at 2:00AM Mar 02, 2021Observed: 6.16 ft at 2:30AM Mar 02, 2021Observed: 6.12 ft at 3:00AM Mar 02, 2021Observed: 6.08 ft at 3:30AM Mar 02, 2021Observed: 6.03 ft at 4:00AM Mar 02, 2021Observed: 6 ft at 4:30AM Mar 02, 2021Observed: 5.96 ft at 5:00AM Mar 02, 2021Observed: 5.91 ft at 5:30AM Mar 02, 2021Observed: 5.88 ft at 6:00AM Mar 02, 2021Observed: 5.84 ft at 6:30AM Mar 02, 2021Observed: 5.8 ft at 7:00AM Mar 02, 2021Observed: 5.76 ft at 7:30AM Mar 02, 2021Observed: 5.72 ft at 8:00AM Mar 02, 2021Observed: 5.69 ft at 8:30AM Mar 02, 2021Observed: 5.65 ft at 9:00AM Mar 02, 2021Observed: 5.62 ft at 9:30AM Mar 02, 2021Observed: 5.58 ft at 10:00AM Mar 02, 2021Observed: 5.55 ft at 10:30AM Mar 02, 2021Observed: 5.51 ft at 11:00AM Mar 02, 2021Observed: 5.48 ft at 11:30AM Mar 02, 2021Highest Forecast: 5.5 ft 1:00PM Mar 02, 2021Forecast: 5.2 ft 7:00PM Mar 02, 2021Forecast: 5 ft 1:00AM Mar 03, 2021Forecast: 4.8 ft 7:00AM Mar 03, 2021Forecast: 4.6 ft 1:00PM Mar 03, 2021Forecast: 4.5 ft 7:00PM Mar 03, 2021Forecast: 4.3 ft 1:00AM Mar 04, 2021Forecast: 4.2 ft 7:00AM Mar 04, 2021Forecast: 4.1 ft 1:00PM Mar 04, 2021Forecast: 4 ft 7:00PM Mar 04, 2021Forecast: 3.9 ft 1:00AM Mar 05, 2021Forecast: 3.8 ft 7:00AM Mar 05, 2021Forecast: 3.7 ft 1:00PM Mar 05, 2021Forecast: 3.7 ft 7:00PM Mar 05, 2021Forecast: 3.6 ft 1:00AM Mar 06, 2021Forecast: 3.6 ft 7:00AM Mar 06, 2021Forecast: 3.5 ft 1:00PM Mar 06, 2021Forecast: 3.5 ft 7:00PM Mar 06, 2021Forecast: 3.4 ft 1:00AM Mar 07, 2021Forecast: 3.4 ft 7:00AM Mar 07, 2021USGS--Water Resources of the United StatesWDVO1(plotting HGIRG) Graph Created (12:32PM Mar 2, 2021)ObservedForecast (issued 9:24AM Mar 2)Latest observed value: 5.48 ft at 11:30 AM EST 2-Mar-2021. Flood Stage is 9 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
NOTE: Gauge reading may be affected by ice.

NOTE: Forecasts for the Portage River at Woodville are issued as needed during times of high water, but are not routinely available.

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Downstream Gauge Downstream Gauge - at Elmore
Flood Categories (in feet)
Major Flood Stage: 13.5
Moderate Flood Stage: 12.5
Flood Stage: 9
Action Stage: 6
Low Stage (in feet): 0

Historic Crests
(1) 17.00 ft on 03/27/1913
(2) 14.66 ft on 02/07/2008
(3) 14.51 ft on 02/15/1950
(4) 14.40 ft on 01/15/2005
(5) 14.13 ft on 12/23/2013
(6) 13.98 ft on 08/27/1998
(7) 13.98 ft on 03/23/1948
(8) 13.97 ft on 03/14/1992
(9) 13.90 ft on 05/21/2020
(10) 13.71 ft on 06/29/2015
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 13.90 ft on 05/21/2020
(2) 10.94 ft on 03/30/2020 (P)
(3) 13.15 ft on 06/03/2019
(4) 13.15 ft on 06/03/2019
(5) 13.29 ft on 11/20/2017
(6) 10.26 ft on 11/07/2017
(7) 13.41 ft on 07/15/2017
(8) 12.89 ft on 05/07/2017
(9) 13.71 ft on 06/29/2015
(10) 14.13 ft on 12/23/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to

Zoom Level:16
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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
22.5 River gage flooded. Historic flooding in Woodville.
20 Main Street, or State Route 20 bridge threatened. Significant flood inundation of several feet effecting property along the river.
18 FEMA 0.2 percent flood level. Significant flooding across most of Woodville. Cherry Street bridge threatened.
17 Record flood. Severe flooding will occur from the Portage River. Residents living in these areas can be expect major flood losses. Property along Erie Street, South Cherry Street, East Main Street, and Water Street effected. Backwater from Victoria Creek flood Fort Findlay Road and Lueke Avenue.
16.5 Flood waters overrun Pemberville Road east of Woodville. Several properties near the river will be inundated along the southern portion of the town. Riverside Drive, Erie Street, and Pemberville Road properties will be the hardest hit. Grand Avenue bridge threatened. Corner of U.S. Route 20 and State Route 105 flooded.
15 FEMA 1 percent flood level. Flood waters affect several low lying roads in Woodville including Erie Street, South Cherry Street, Riverside Drive, East Main Street, and Water Street. Backwater from Victoria Creek flood Fort Findlay Road and Grand Avenue. Half a dozen homes inundated in Pemberville.
14.5 Homes in Pemberville along Bierley and Bridge Street inundated with a few feet of water.
14 State Route 23 inundated.
13.5 Homes in Pemberville upstream of Woodville inundated with a few feet of water and cut off. Water reaches the buildings in the business district.
13 Flood waters inundate basements of property adjecent to the river near Pemberville. The parking lot of the downtown business district in Pemberville is flooded. Backwater from the ditch east of Wayne Rd inundates South River Road. West of Wayne Road, both North and South River Roads are inundated with feet of water. In Woodville, Trail Marker Park and adjacent low lying roads of Cherry Street and Erie Street are inundated. Backwater from the ditch on State Route 105 west of State Route 582 covers the road.
12 Water inundates some of the parking lot of the downtown business district in Pemberville and Water Street is flooded. In Woodville the lower portions of South Cherry Street near Trail Marker Park inundated. Flood waters threaten homes on Bierly Street, Bridge Street, and Water Street in Pemberville. Some roads southwest of Pemberville flood.
11 Water over State Route 105 in Sandusky County. Water near homes on Water, Bierley, and Bridge Streets in Pemberville. The river floods Trail Marker Park up to Erie Street in Woodville.
10.5 Water is encroaching on State Route 105 in Sandusky County northeast of U.S. 23. Water is in the backyard of residents on Bierley, Bridge, and Water Streets in Pemberville.
9 The river inundates lower portions of Trail Marker Park and is out of banks in Pemberville.
About This Location Collapse

Latitude: 41.449496° N, Longitude: 83.361320° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 9 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 29 614.75 ft 623.75 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 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.

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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
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Page last modified: 30-Oct-2020 4:10 PM
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