Major Flood
1499 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: TRES2). 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
1496 ft
Minor Flood
1495 ft
Action Stage
1494 ft
What Floods at Each Level
1501 ft
Water reaches the bottom of the bridge at the gauge site on 240th St.
1499 ft
Several houses in Trent will be surrounded by water.
1498 ft
Flood waters reach into the backyards of several houses in Trent. 240th St on the west side of Trent begins to flood.
1496 ft
478th Avenue and 242nd Street begin to flood.
1495 ft
Flooding begins to affect agricultural lands west of Trent along 240th Street. The river access road just east of the bridge on 240th begins to flood.
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 12, 2019 | 1501.42 ft | — |
| Mar 23, 2019 | 1500 ft | — |
| Apr 9, 2023 | 1498.12 ft | — |
About This Gauge
NWS LID
TRES2
River
Big Sioux River
County
Moody, SD
Coordinates
43.9063°N, 96.6631°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 at Trent?
The Big Sioux River at Trent 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 at Trent?
The NWS-defined flood stage for Big Sioux River at Trent is 1495 feet. Action stage begins at 1494 feet. Moderate flooding starts at 1496 feet, and major flooding at 1499 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 at Trent 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 at Trent gauge located?
The gauge is located in Moody County, South Dakota at coordinates 43.9063°N, 96.6631°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.