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Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Flat River at Smyrna Observed crest: 3.98 ft at 1:00am Feb 05 Observed: 4.03 ft at 6:00am Jan 31 Observed: 4 ft at 7:00am Jan 31 Observed: 3.98 ft at 8:00am Jan 31 Observed: 3.96 ft at 9:00am Jan 31 Observed: 3.94 ft at 10:00am Jan 31 Observed: 3.95 ft at 11:00am Jan 31 Observed: 4 ft at 12:00pm Jan 31 Observed: 4.1 ft at 1:00pm Jan 31 Observed: 4.12 ft at 2:00pm Jan 31 Observed: 4.1 ft at 3:00pm Jan 31 Observed: 4.09 ft at 4:00pm Jan 31 Observed: 4.06 ft at 5:00pm Jan 31 Observed: 4.06 ft at 6:00pm Jan 31 Observed: 4.07 ft at 7:00pm Jan 31 Observed: 4.04 ft at 8:00pm Jan 31 Observed: 4 ft at 9:00pm Jan 31 Observed: 3.99 ft at 10:00pm Jan 31 Observed: 4 ft at 11:00pm Jan 31 Observed: 4.01 ft at 12:00am Feb 1 Observed: 4.02 ft at 1:00am Feb 1 Observed: 4.03 ft at 2:00am Feb 1 Observed: 4.03 ft at 3:00am Feb 1 Observed: 4.02 ft at 4:00am Feb 1 Observed: 4.02 ft at 5:00am Feb 1 Observed: 4.02 ft at 6:00am Feb 1 Observed: 4.02 ft at 7:00am Feb 1 Observed: 4.02 ft at 8:00am Feb 1 Observed: 4.02 ft at 9:00am Feb 1 Observed: 4.04 ft at 10:00am Feb 1 Observed: 4.06 ft at 11:00am Feb 1 Observed: 4.03 ft at 12:00pm Feb 1 Observed: 3.87 ft at 1:00pm Feb 1 Observed: 3.67 ft at 2:00pm Feb 1 Observed: 3.59 ft at 3:00pm Feb 1 Observed: 3.59 ft at 4:00pm Feb 1 Observed: 3.62 ft at 5:00pm Feb 1 Observed: 3.68 ft at 6:00pm Feb 1 Observed: 3.74 ft at 7:00pm Feb 1 Observed: 3.81 ft at 8:00pm Feb 1 Observed: 4.04 ft at 9:00pm Feb 1 Observed: 4.15 ft at 10:00pm Feb 1 Observed: 4.14 ft at 11:00pm Feb 1 Observed: 4.13 ft at 12:00am Feb 2 Observed: 4.12 ft at 1:00am Feb 2 Observed: 4.1 ft at 2:00am Feb 2 Observed: 4.02 ft at 3:00am Feb 2 Observed: 3.91 ft at 4:00am Feb 2 Observed: 3.91 ft at 5:00am Feb 2 Observed: 3.96 ft at 6:00am Feb 2 Observed: 3.98 ft at 7:00am Feb 2 Observed: 3.99 ft at 8:00am Feb 2 Observed: 3.99 ft at 9:00am Feb 2 Observed: 3.99 ft at 10:00am Feb 2 Observed: 4.05 ft at 11:00am Feb 2 Observed: 4.02 ft at 12:00pm Feb 2 Observed: 3.98 ft at 1:00pm Feb 2 Observed: 3.97 ft at 2:00pm Feb 2 Observed: 3.96 ft at 3:00pm Feb 2 Observed: 4.05 ft at 4:00pm Feb 2 Observed: 4.1 ft at 5:00pm Feb 2 Observed: 4.08 ft at 6:00pm Feb 2 Observed: 4.06 ft at 7:00pm Feb 2 Observed: 4.02 ft at 8:00pm Feb 2 Observed: 3.96 ft at 9:00pm Feb 2 Observed: 3.95 ft at 10:00pm Feb 2 Observed: 3.94 ft at 11:00pm Feb 2 Observed: 3.9 ft at 12:00am Feb 3 Observed: 3.87 ft at 1:00am Feb 3 Observed: 3.87 ft at 2:00am Feb 3 Observed: 3.9 ft at 3:00am Feb 3 Observed: 3.91 ft at 4:00am Feb 3 Observed: 3.92 ft at 5:00am Feb 3 Observed: 3.93 ft at 6:00am Feb 3 Observed: 3.93 ft at 7:00am Feb 3 Observed: 3.93 ft at 8:00am Feb 3 Observed: 3.93 ft at 9:00am Feb 3 Observed: 3.93 ft at 10:00am Feb 3 Observed: 3.93 ft at 11:00am Feb 3 Observed: 3.93 ft at 12:00pm Feb 3 Observed: 3.93 ft at 1:00pm Feb 3 Observed: 3.93 ft at 2:00pm Feb 3 Observed: 3.93 ft at 3:00pm Feb 3 Observed: 3.93 ft at 4:00pm Feb 3 Observed: 3.93 ft at 5:00pm Feb 3 Observed: 3.98 ft at 6:00pm Feb 3 Observed: 4 ft at 7:00pm Feb 3 Observed: 3.97 ft at 8:00pm Feb 3 Observed: 3.9 ft at 9:00pm Feb 3 Observed: 3.88 ft at 10:00pm Feb 3 Observed: 3.86 ft at 11:00pm Feb 3 Observed: 3.82 ft at 12:00am Feb 4 Observed: 3.82 ft at 1:00am Feb 4 Observed: 3.83 ft at 2:00am Feb 4 Observed: 3.84 ft at 3:00am Feb 4 Observed: 3.86 ft at 4:00am Feb 4 Observed: 3.86 ft at 5:00am Feb 4 Observed: 3.87 ft at 6:00am Feb 4 Observed: 3.86 ft at 7:00am Feb 4 Observed: 3.85 ft at 8:00am Feb 4 Observed: 3.85 ft at 9:00am Feb 4 Observed: 3.85 ft at 10:00am Feb 4 Observed: 3.89 ft at 11:00am Feb 4 Observed: 3.98 ft at 12:00pm Feb 4 Observed: 3.88 ft at 1:00pm Feb 4 Observed: 3.71 ft at 2:00pm Feb 4 Observed: 3.59 ft at 3:00pm Feb 4 Observed: 3.51 ft at 4:00pm Feb 4 Observed: 3.49 ft at 5:00pm Feb 4 Observed: 3.52 ft at 6:00pm Feb 4 Observed: 3.59 ft at 7:00pm Feb 4 Observed: 3.77 ft at 8:00pm Feb 4 Observed: 3.92 ft at 9:00pm Feb 4 Observed: 3.97 ft at 10:00pm Feb 4 Observed: 3.99 ft at 11:00pm Feb 4 Observed: 3.98 ft at 12:00am Feb 5 Observed: 3.98 ft at 1:00am Feb 5 Observed: 3.97 ft at 2:00am Feb 5 Observed: 3.96 ft at 3:00am Feb 5 Observed: 3.95 ft at 4:00am Feb 5 Observed: 3.94 ft at 5:00am Feb 5 Observed: 3.93 ft at 6:00am Feb 5 Observed: 3.92 ft at 7:00am Feb 5 Observed: 3.91 ft at 8:00am Feb 5 Observed: 3.9 ft at 9:00am Feb 5 Observed: 3.9 ft at 10:00am Feb 5 Observed: 3.88 ft at 11:00am Feb 5 Observed: 3.87 ft at 12:00pm Feb 5 Observed: 3.87 ft at 1:00pm Feb 5 Observed: 3.89 ft at 2:00pm Feb 5 Observed: 3.89 ft at 3:00pm Feb 5 Observed: 3.88 ft at 4:00pm Feb 5 Observed: 3.88 ft at 5:00pm Feb 5 Observed: 3.88 ft at 6:00pm Feb 5 Observed: 3.89 ft at 7:00pm Feb 5 Observed: 3.89 ft at 8:00pm Feb 5 Observed: 3.89 ft at 9:00pm Feb 5 Observed: 3.88 ft at 10:00pm Feb 5 Observed: 3.84 ft at 11:00pm Feb 5 Observed: 3.81 ft at 12:00am Feb 6 Observed: 3.81 ft at 1:00am Feb 6 Observed: 3.82 ft at 2:00am Feb 6 Observed: 3.82 ft at 3:00am Feb 6 Observed: 3.84 ft at 4:00am Feb 6 Observed: 3.86 ft at 5:00am Feb 6 Observed: 3.87 ft at 6:00am Feb 6 Observed: 3.86 ft at 7:00am Feb 6 Observed: 3.86 ft at 8:00am Feb 6 Observed: 3.85 ft at 9:00am Feb 6 Observed: 3.84 ft at 10:00am Feb 6 Observed: 3.87 ft at 11:00am Feb 6 Observed: 3.97 ft at 12:00pm Feb 6 Observed: 3.98 ft at 1:00pm Feb 6 Observed: 3.88 ft at 2:00pm Feb 6 Observed: 3.8 ft at 3:00pm Feb 6 Observed: 3.74 ft at 4:00pm Feb 6 Observed: 3.77 ft at 5:00pm Feb 6 Observed: 3.82 ft at 6:00pm Feb 6 Observed: 3.83 ft at 7:00pm Feb 6 Observed: 3.81 ft at 8:00pm Feb 6 Observed: 3.76 ft at 9:00pm Feb 6 Observed: 3.75 ft at 10:00pm Feb 6 Observed: 3.74 ft at 11:00pm Feb 6 Observed: 3.7 ft at 12:00am Feb 7 Observed: 3.67 ft at 1:00am Feb 7 Observed: 3.68 ft at 2:00am Feb 7 Observed: 3.72 ft at 3:00am Feb 7 Observed: 3.74 ft at 4:00am Feb 7 Observed: 3.76 ft at 5:00am Feb 7 Observed: 3.75 ft at 6:00am Feb 7 Observed: 3.75 ft at 7:00am Feb 7 Observed: 3.74 ft at 8:00am Feb 7 Observed: 3.74 ft at 9:00am Feb 7 Observed: 3.74 ft at 10:00am Feb 7 Observed: 3.65 ft at 11:00am Feb 7 Observed: 3.65 ft at 12:00pm Feb 7 Observed: 3.62 ft at 1:00pm Feb 7 Observed: 3.61 ft at 2:00pm Feb 7 Observed: 3.54 ft at 3:00pm Feb 7 Observed: 3.48 ft at 4:00pm Feb 7 Observed: 3.49 ft at 5:00pm Feb 7 Observed: 3.56 ft at 6:00pm Feb 7 Observed: 3.74 ft at 7:00pm Feb 7 Observed: 3.86 ft at 8:00pm Feb 7 Observed: 3.89 ft at 9:00pm Feb 7 Observed: 3.85 ft at 10:00pm Feb 7 Observed: 3.82 ft at 11:00pm Feb 7 Observed: 3.81 ft at 12:00am Feb 8 Observed: 3.8 ft at 1:00am Feb 8 Observed: 3.76 ft at 2:00am Feb 8 Observed: 3.72 ft at 3:00am Feb 8 Observed: 3.79 ft at 4:00am Feb 8 Observed: 3.8 ft at 5:00am Feb 8 Observed: 3.8 ft at 6:00am Feb 8 Observed: 3.78 ft at 7:00am Feb 8 Observed: 3.76 ft at 8:00am Feb 8 Observed: 3.74 ft at 9:00am Feb 8 Observed: 3.74 ft at 10:00am Feb 8 Observed: 3.75 ft at 11:00am Feb 8 Observed: 3.75 ft at 12:00pm Feb 8 Observed: 3.64 ft at 1:00pm Feb 8 Observed: 3.58 ft at 2:00pm Feb 8 Observed: 3.48 ft at 3:00pm Feb 8 Observed: 3.43 ft at 4:00pm Feb 8 Observed: 3.46 ft at 5:00pm Feb 8 Observed: 3.52 ft at 6:00pm Feb 8 Observed: 3.68 ft at 7:00pm Feb 8 Observed: 3.8 ft at 8:00pm Feb 8 Observed: 3.82 ft at 9:00pm Feb 8 Observed: 3.8 ft at 10:00pm Feb 8 Observed: 3.82 ft at 11:00pm Feb 8 Observed: 3.86 ft at 12:00am Feb 9 Observed: 3.88 ft at 1:00am Feb 9 Observed: 3.9 ft at 2:00am Feb 9 Observed: 3.92 ft at 3:00am Feb 9 Observed: 3.91 ft at 4:00am Feb 9 Observed: 3.89 ft at 5:00am Feb 9 Observed: 3.86 ft at 6:00am Feb 9 Observed: 3.85 ft at 7:00am Feb 9 Observed: 3.82 ft at 8:00am Feb 9 Observed: 3.8 ft at 9:00am Feb 9 Observed: 3.79 ft at 10:00am Feb 9 Observed: 3.78 ft at 11:00am Feb 9 Observed: 3.84 ft at 12:00pm Feb 9 Observed: 3.85 ft at 1:00pm Feb 9 Observed: 3.79 ft at 2:00pm Feb 9 Observed: 3.75 ft at 3:00pm Feb 9 Observed: 3.73 ft at 4:00pm Feb 9 Observed: 3.72 ft at 5:00pm Feb 9 Observed: 3.72 ft at 6:00pm Feb 9 Observed: 3.73 ft at 7:00pm Feb 9 Observed: 3.75 ft at 8:00pm Feb 9 Observed: 3.79 ft at 9:00pm Feb 9 Observed: 3.83 ft at 10:00pm Feb 9 Observed: 3.84 ft at 11:00pm Feb 9 Observed: 3.84 ft at 12:00am Feb 10 Observed: 3.82 ft at 1:00am Feb 10 Graph Created (5:45am Feb 10, 2010) Observed USGS--Water Resources of the United States SMYM4 (plotting HGIRP) Gage 0 Datum: 729.53 Latest observed value: 3.82 ft at 1:00 AM EST 10-Feb-2010. Flood Stage is 8.5 ft. Flow (kcfs)
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Datum: N/A
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

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

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

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Flood Categories (in feet)
Major Flood Stage:10.5
Moderate Flood Stage:9.5
Flood Stage:8.5
Action Stage:5

Historical Crests
(1) 9.05 ft on 09/13/1986
(2) 8.50 ft on 01/22/2005
(3) 7.84 ft on 12/22/2000
(4) 7.77 ft on 01/26/2005
(5) 7.71 ft on 12/24/2008
Show More Historical Crests

Low Water Records
(1) 2.3 ft on 09/09/1953
(2) 0 ft on 08/03/1961
(2) 0 ft on 09/05/1964

 Flat River at Smyrna location map

Flood Impacts Collapse
9.1 Expect major flooding of campground sites and evacuation of campers in Double R Ranch campground during the camping season. Approximately a dozen homes have water in their basements
8.5 Flooding begins to impact homes and flood basements in low lying areas along the river
7.0 Expect minor flooding of about 30 Double R Ranch campground sites and in low lying areas adjacent to the river
6.0 Expect minor flooding of low lying areas adjacent to the river and Double R Ranch campground
5.0 Overflow begins in low areas adjacent to the river

About This Location Collapse
Latitude: 43.052800° N, Longitude: 85.264700° W, Horizontal Datum: NAD83

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 8.5 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 29 729.53 ft 735.53 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 Smyrna

Additional Information Collapse
How low could the river get?

Resources Collapse
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
Grand Rapids Weather Forecast Office
4899 South Complex Drive SE
Grand Rapids, MI 49512-4034
(616) 949-0643
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