Major Flood
2586 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: REVS2). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
2584 ft
Minor Flood
2582 ft
Action Stage
2580 ft
What Floods at Each Level
2586 ft
Major flood stage. Significant and widespread flooding along the South Fork of the Grand River. Water may approach portions of White Hill Road and Divide Road.
2584 ft
Moderate flood stage. Widespread flooding of pasture lands along the South Fork of the Grand River. Water will approach the low steel on the White Hill Road Bridge and the Divide Road bridges.
2582 ft
Minor flood stage. Minor flooding of pasture land along the South Fork of the Grand River from Highway 70 downstream to White Hill Road and Divide Road.
2580 ft
Action stage. Low lying areas along the South Fork of the Grand River will be innundated.
Impact statements from the National Weather Service, describing what typically happens at each water level.
Low-Water Impacts
5 ft
Stage needed to inundate designated Gulf Sturgeon critical habitat below Jim Woodruff Lock and Dam.
3 ft
Temporary (not sustainable) operating level for of Scholz Power Plant
What happens as water levels drop, per the National Weather Service.
7-Day Water Level Chart
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About This Gauge
NWS LID
REVS2
River
South Fork Grand River
County
Perkins, SD
Coordinates
45.6399°N, 102.9975°W
Get Flood Alerts for South Fork Grand River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of South Fork Grand River at Hwy 79?
The South Fork Grand River at Hwy 79 gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for South Fork Grand River at Hwy 79?
The NWS-defined flood stage for South Fork Grand River at Hwy 79 is 2582 feet. Action stage begins at 2580 feet. Moderate flooding starts at 2584 feet, and major flooding at 2586 feet.
How do I get alerts when South Fork Grand River rises?
Download StormCast free on Google Play, go to River Gauges, and add South Fork Grand River at Hwy 79 to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the South Fork Grand River at Hwy 79 gauge located?
The gauge is located in Perkins County, South Dakota at coordinates 45.6399°N, 102.9975°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
On This River
Downstream: South Fork Grand River (SD) near Cash
More Resources
Source & Notes
Data provided by: South Dakota Department of Agriculture and Natural Resources