Visit https://www.weather.gov/owp/operations for access to new EXPERIMENTAL products and services from the National Water Center: National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook and the National Water Center Visualization Services, a suite of geospatial services depicting River Forecast Center and National Water Model information.

View the Enhanced Operating Capability Products and Services StoryMap here

Weather Forecast Office Rapid City, SD

Missouri Basin River Forecast Center

Hydrograph

River at a Glance

Download

Auto Refresh: OFF

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

NOTE: Forecasts are not available for the Grace Coolidge Creek near Custer. Only observed stages are available for this point.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Flood Categories (in feet) Major Flood Stage: 11 Moderate Flood Stage: 10 Flood Stage: 9.5 Action Stage: 8 Low Stage (in feet): -9999 Historic Crests (1) 12.76 ft on 02/09/1979 (2) 11.39 ft on 05/08/1995 (3) 10.90 ft on 06/15/1976 (4) 10.84 ft on 09/07/1989 (5) 10.67 ft on 05/28/2019 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 7.67 ft on 05/23/2021 (2) 7.31 ft on 05/17/2020 (3) 7.52 ft on 10/31/2019 (4) 10.67 ft on 05/28/2019 (5) 8.09 ft on 06/22/2018 Show More Recent Crests (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:14 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
11	Major Flood Stage. Extensive inundation of structures and roads possible due to flooding on Grace Coolidge Creek.
10	Moderate Flood Stage. Some inundation of structures and roads along Grace Coolidge Creek.
9.5	Minor Flood Stage. Minor flooding along Grace Coolidge Creek. Low lying roads in Custer State Park may become impassable.
8.5	Grace Coolidge Creek begins to overflow roads in Custer State Park.
8	Low land flooding along the creek begins.
Photos (1) Looking upstream (2) Looking downstream (3) Staff gage

About This Location

Latitude: 43.761111° N, Longitude: 103.363611° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 9.5 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 4107.04 4116.54 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   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Custer

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Missouri Basin River Forecast Center NOHRSC - Snow Survey Drought Monitor MADIS-HADS River Stage Data Turn Around Don't Drown Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Flood Event Archive Spring Flood Outlook

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 Rapid City Weather Forecast Office 300 East Signal Drive Rapid City, SD 57701-3800 (605) 341-7531 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:28 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities