Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Weather Forecast Office Sioux Falls, SD

Missouri Basin River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (CDT) Datum: NAVD88 Metadata

NOTE: No forecasts are available for this location NOTE: Forecasts are not available for the Split Rock Creek near Garretson. Only observed stages are available for this point.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 1395 Moderate Flood Stage: 1392 Flood Stage: 1389 Action Stage: 1386 Low Stage (in feet): -9999 Historic Crests (1) 1,380.63 ft on 08/18/2020 (P): Preliminary values subject to further review. Recent Crests (1) 1,380.63 ft on 08/18/2020 (P): Preliminary values subject to further review. Low Water Records Currently none available. For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:16 Legend FEMA Layer Gauge Location Disclaimer Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

If you notice any errors in the below information, please contact our Webmaster
1400	484th Avenue near the gauging location begins to flood as the bridge is overtopped.
1398	Portions of Highway 11 will begin to flood west and southwest of Garretson including the bridge west of town being overtopped.
1397	Water reaches the bottom of the bridge at the gauging location on 484th Avenue.
1395	Some of the roads in Palisades State Park will begin to flood, and water reaches the bottom of the bridges on Highway 11 west of Garretson.
1392	Significant agricultural flooding beings, and portions of 483rd Avenue near 257th Street will flood.
1389	The lower parts of the road at Split Rock Park in Garretson flood, and minor agricultural flooding begins along the entire stretch of the creek.
1386	The lowest banks overflow resulting in minor pasture flooding and flooding to some of the day-use areas in Palisades State Park. Water may begin to approach the bridge just north of the dam in Split Rock Park
Photos (1) Downstream View (2) Upstream View

About This Location

Latitude: 43.675600° N, Longitude: 96.531200° W, Horizontal Datum: NAD27 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 1389 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source NAVD88 0.00 1389.00 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Upper Missouri River Basin Monitoring Network Missouri Basin River Forecast Center North Central River Forecast Center NOHRSC Snow Information Drought Monitor USGS HADS River Stage Data Inundation Mapping Locations Precipitation Frequency Data South Dakota Flood Information System Iowa Flood Center Minnesota DNR FEMA Region VIII Flood Information ___

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management SDSU Climate and Weather SDSU Drought Dashboard Iowa State University Soil Temperatures Iowa DNR State Beach Water Quality Daily High Temperature Map Daily Low Temperature Map Daily Precipitation Map Daily Snowfall Map Daily Snow Depth Map Report on July 29-30, 2010 heavy rain/flood event in Jerauld County

Collaborative Agencies The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here. NWS Information National Weather Service Sioux Falls Weather Forecast Office 26 Weather Lane Sioux Falls, SD 57104-0198 (605) 330-4247 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:29 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities