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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

DID YOU KNOW... Please try our new TEST hydrograph page link at: - Just replace “abcde” with your local hydrograph five character ID found in the lower left corner of the hydrograph.  In late March of 2024, the base URL path will become  Feedback can be provided HERE

Hydrograph River at a Glance Download
Chocolay River near Harvey Stage (ft)Flow (kcfs)HRVM4(plotting HGIRZ) Graph Created (6:45PM Dec 4, 2023)Flood Stage is 10 ft
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Tabular Data (UTC)
Tabular Data (EST)
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Datum: NAVD88
NOTE: Stage measured manually and reported by river observer. No automated gauge on-site.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Chocolay River near Harvey are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - near Skandia Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 13
Moderate Flood Stage: 11.5
Flood Stage: 10
Action Stage: 9.5
Low Stage (in feet): -9999

Historic Crests
(1) 13.50 ft on 04/20/1985
(2) 11.70 ft on 05/13/2006
(3) 11.05 ft on 11/07/1988
(4) 10.84 ft on 10/19/2016
(5) 10.80 ft on 09/06/2018
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 10.34 ft on 04/15/2022
(2) 10.80 ft on 09/06/2018
(3) 10.84 ft on 10/19/2016
(4) 9.50 ft on 04/14/2015 (P)
(5) 10.06 ft on 04/29/2013
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
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
14.5 Water reaches the bottom of the M-28 bridge
13.5 Green Garden Road may be closed. Mangum Road will be covered in water and may be closed. Flood waters reach the April 1985 high water mark
12 Homes in low-lying areas along Riverside Road and homes in the 200 block of Timber Lane will be inundated. Backwater effects near the mouth of the river may impact homes on Motel Drive
11.5 The fishing pier and parking lot near the M-28 bridge will be under water. Timber Lane and Riverside Road may be closed. Homes along Timber Lane...and some along Riverside Road...will experience extensive flooding
10 Water inundates the entire parking lot at the M-28 bridge...and the fishing pier begins to be submerged. Water inundates low lying areas along Timber Lane and Riverside Road downstream of the river gauge site
9 Water begins to inundate the parking lot where M-28 crosses the Chocolay well as low lying areas along Timber Lane and towards the mouth of the river
(1) Upstream From M-28 Bridge
(2) Downstream From M-28 Bridge
(3) Downstream From DNR Fishing Pier
About This Location Collapse

Latitude: 46.489167° N, Longitude: 87.331111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 10 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 599.19 609.19 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
Additional Information Collapse
How low could the river get?
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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
Marquette Weather Forecast Office
112 Airpark Drive South
Negaunee, MI 49866
(906) 475-5212
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Page last modified: 2-Nov-2020 7:30 PM
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