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FLOOD CONDITIONS
Flood Alerts (observations)
Locations with water level in the range of alerts calculated using real-time stream level observations
FLOOD FORECAST
Flood Alerts (forecast)
Flood alerts calculated using NWS stage forecast
DATA RESOURCES
Stream Gauges (USGS)
USGS + SDDANR gauges
Stream Gauges (SDDANR + MNDNR)
FLOOD MAPS
Flood Map for Communities
Flood extents related to measured or forecasted river conditions
Watertown
Brookings
Dell Rapids
Sioux Falls
North Sioux City
Missouri River
WEATHER CONDITIONS
Current Rainfall
Daily Rainfall
RAINFALL FORECAST
Forecast (Hourly)
Forecast (Daily)
COMMUNITY INFORMATION
WATERSHED CHARACTERISTICS
View Maps by
River Stage
River stage references a local vertical datum (in feet, ft) established by the US Geological Survey for this specific river gage. This stage corresponds with stages reported by the USGS, the National Weather Service, and US Army Corps of Engineers. The corresponding river discharge or water flow is given in cfs or cubic feet per second.
Return Period
A return period is an estimate of the interval of time between floods of a certain intensity or size
Real-time Stage Values
Real-time Stage Values
Flood Scenarios
Water Depth and Stage (NAVD 88)
Click anywhere on the flood map to see water depth and stage for the location
Flood Scenario Hydrograph
Click here to see the hydrograph for selected model
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LEGEND
USGS Gauge
SD DANR or MNDNR Gauge
Major Flood Stage
Moderate Flood Stage
Flood Stage
Action Stage
No Alert
STREET
SATELLITE
HYBRID
TERRAIN
STREAMS
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Major Flood Stage
Moderate Flood Stage
Flood Stage
Action Stage
No Alert
USGS Gauge
SD DANR or MNDNR Gauge