National Weather Service Advanced Hydrologic Prediction Service

By inergency On Apr 15, 2024

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Web Portal Changes:

Please visit https://www.weather.gov/owp/operations for more information.

River Raisin at GRAPE

NOTE: Forecasts are not available for the River Raisin at GRAPE. Only observed stages are available for this point.

Flood Categories (in feet)

Historic Crests
(1) 11.16 ft on 03/15/1982
(2) 10.40 ft on 03/16/1982
(3) 8.97 ft on 02/13/2001
(4) 8.79 ft on 01/26/1999
(5) 8.38 ft on 01/12/2008

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.38 ft on 01/12/2008
(2) 8.97 ft on 02/13/2001
(3) 8.79 ft on 01/26/1999
(4) 10.40 ft on 03/16/1982
(5) 11.16 ft on 03/15/1982

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

Show FEMA’s National Flood Hazard Layers

	Gauge Location	Disclaimer
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.

Latitude: 41.960556° N,
Longitude: 83.531111° W,
Horizontal Datum:
NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	Not Available	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	Not Available	Not Available	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

Current/Historical Observations:

THE OFFICIAL NAME OF THIS USGS GAGE IS “NEAR MONROE”. SINCE THE NATIONAL WEATHER SERVICE OPERATES A GAGE FOR FLOOD FORECASTING IN DOWNTOWN MONROE, FOR DISPLAY PURPOSE AND TO AVOID CONFUSION IT HAS BEEN RENAMED GRAPE WHICH IS THE NAME OF THE REFERENCE POINT LOCATION IT IS IN.

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.

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