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Hydrograph River at a Glance Download
Wisconsin River at Merrill Stage (ft)Flow (kcfs)Observed: 5.27 ft at 7:00AM Jan 18, 2022Observed: 5.22 ft at 7:00AM Jan 19, 2022Highest Observation: 5.42 ft at 7:00AM Jan 20, 2022USGS--Water Resources of the United StatesRRLW3(plotting HGIRZ) Graph Created (5:05PM Jan 20, 2022)ObservedLatest observed value: 5.42 ft at 7:00 AM CST 20-Jan-2022. Flood Stage is 11 ft
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Datum: NAVD88
NOTE: Gauge reading affected by power generation.

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

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Upstream Locations Upstream Gauge Downstream Gauge Downstream Gauge - below Wausau Dam
Flood Categories (in feet)
Major Flood Stage: 15
Moderate Flood Stage: 13.5
Flood Stage: 11
Action Stage: 10
Low Stage (in feet): 4

Historic Crests
(1) 18.26 ft on 08/31/1941
(2) 17.50 ft on 07/24/1912
(3) 13.85 ft on 09/18/1942
(4) 13.23 ft on 04/11/2011
(5) 13.04 ft on 04/02/1967
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(P): Preliminary values subject to further review.

Recent Crests
(1) 11.65 ft on 06/13/2017 (P)
(2) 12.25 ft on 05/19/2017 (P)
(3) 11.43 ft on 03/17/2016
(4) 13.23 ft on 04/11/2011
(5) 12.23 ft on 09/25/2010
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(P): Preliminary values subject to further review.

Low Water Records
(1) 2.00 ft on 09/15/1910
(2) 2.86 ft on 08/06/2005
(3) 2.90 ft on 08/11/2009
(4) 3.28 ft on 08/13/2007
(5) 3.35 ft on 08/10/1934
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Zoom Level:14
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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
18 The Merrill sewage disposal plant...area parks and lowland are flooded. The western approach of Highway 64 bridge is covered with floodwaters.
16 The west approach to the highway 64 bridge becomes flooded.
13 Several feet of water may be covering area parks and lowland in Merrill. Floodwaters reach the base of the river gauging station.
11 Flooding mainly affects Merrill area parks and agricultural land.
10 There is minor lowland flooding. Flood stage is at 11 feet.
3.5 About 2 feet below normal stage...submerged rocks and structures may become more hazardous to boaters over more sections of the river .
(1) Riverside park in Merrill at 12.35 feet
(2) Downstream looking at the Business 51 bridge. Stage at 6.94 feet.
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Latitude: 45.178056° N, Longitude: 89.681111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 11 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 1228.83 ft 1139.83 ft Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 1228.85 ft 1239.85 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:

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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
Green Bay Weather Forecast Office
2485 South Point Road
Green Bay, WI 54313
(920) 494-2363
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Page last modified: 2-Nov-2020 7:29 PM
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