Major Flood
1117 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: SWMS2). 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
1115 ft
Minor Flood
1113 ft
Action Stage
1110 ft
What Floods at Each Level
1117 ft
479th Avenue begins to flood.
1115 ft
148th Street begins to flood, water reaches the bottom of the bridge on 479th Avenue, and there is major agricultural flooding.
1113 ft
Water reaches the bottom of the bridge on 148th Street.
1110 ft
The lower banks overtop with minor agricultural flooding.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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About This Gauge
NWS LID
SWMS2
River
South Fork Whetstone River
County
Grant, SD
Coordinates
45.2329°N, 96.6189°W
Get Flood Alerts for South Fork Whetstone 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 Whetstone River near Milbank?
The South Fork Whetstone River near Milbank 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 Whetstone River near Milbank?
The NWS-defined flood stage for South Fork Whetstone River near Milbank is 1113 feet. Action stage begins at 1110 feet. Moderate flooding starts at 1115 feet, and major flooding at 1117 feet.
How do I get alerts when South Fork Whetstone River rises?
Download StormCast free on Google Play, go to River Gauges, and add South Fork Whetstone River near Milbank 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 Whetstone River near Milbank gauge located?
The gauge is located in Grant County, South Dakota at coordinates 45.2329°N, 96.6189°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: Observations courtesy of South Dakota DANR