Major Flood
1521 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: EGAS2). 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
1519 ft
Minor Flood
1516.5 ft
Action Stage
1515 ft
What Floods at Each Level
1527 ft
the bridge on 478th Avenue is overtopped.
1524 ft
The bridge on 2nd Street is overtopped.
1523 ft
The bridge on Highway 34 is overtopped, and water reaches the bottom of the bridge on 478th Avenue.
1522 ft
Water reaches the bottom of the bridge on 2nd Street and the ballfield at Egan Park floods.
1521 ft
Highway 34 begins to flood, and 478th Avenue north of the bridge begins to flood.
1519 ft
Water is across the road on both sides of the bridge by the Egan Park, and water reaches the bottom of the bridge on Highway 34.
1517.5 ft
City park in Egan begins to flood
1516.5 ft
Flooding begins to affect agricultural lands around Egan.
1515 ft
The lowest banks overflow near Highway 34 and also near 479th Avenue.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Sep 11, 2019 | 1524.2 ft | — |
| Mar 22, 2019 | 1522.48 ft | — |
| Apr 25, 2018 | 1520.3 ft | — |
About This Gauge
NWS LID
EGAS2
River
Big Sioux River
County
Moody, SD
Coordinates
44.0072°N, 96.6292°W
Get Flood Alerts for Big Sioux 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 Big Sioux River near Egan?
The Big Sioux River near Egan 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 Big Sioux River near Egan?
The NWS-defined flood stage for Big Sioux River near Egan is 1516.5 feet. Action stage begins at 1515 feet. Moderate flooding starts at 1519 feet, and major flooding at 1521 feet.
How do I get alerts when Big Sioux River rises?
Download StormCast free on Google Play, go to River Gauges, and add Big Sioux River near Egan 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 Big Sioux River near Egan gauge located?
The gauge is located in Moody County, South Dakota at coordinates 44.0072°N, 96.6292°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Observations courtesy of South Dakota DANR
- No forecasts are available for this location
- Gauge reading may be affected by ice.