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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.

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Hydrograph River at a Glance Download
Grace Coolidge Creek near Custer Stage (ft)Flow (kcfs)Observed: 6.9 ft at 2:30AM Sep 27, 2023Observed: 6.9 ft at 2:45AM Sep 27, 2023Observed: 6.9 ft at 3:00AM Sep 27, 2023Observed: 6.9 ft at 3:15AM Sep 27, 2023Observed: 6.9 ft at 3:30AM Sep 27, 2023Observed: 6.9 ft at 3:45AM Sep 27, 2023Observed: 6.9 ft at 4:00AM Sep 27, 2023Observed: 6.9 ft at 4:15AM Sep 27, 2023Observed: 6.9 ft at 4:30AM Sep 27, 2023Observed: 6.9 ft at 4:31AM Sep 27, 2023Observed: 6.9 ft at 4:45AM Sep 27, 2023Observed: 6.9 ft at 4:46AM Sep 27, 2023Observed: 6.9 ft at 5:00AM Sep 27, 2023Observed: 6.9 ft at 5:01AM Sep 27, 2023Observed: 6.9 ft at 5:15AM Sep 27, 2023Observed: 6.9 ft at 5:30AM Sep 27, 2023Observed: 6.9 ft at 5:45AM Sep 27, 2023Highest Observation: 6.91 ft at 6:00AM Sep 27, 2023Highest Observation: 6.91 ft at 6:15AM Sep 27, 2023Observed: 6.9 ft at 6:30AM Sep 27, 2023Highest Observation: 6.91 ft at 6:45AM Sep 27, 2023Observed: 6.9 ft at 7:00AM Sep 27, 2023Observed: 6.9 ft at 7:15AM Sep 27, 2023Observed: 6.9 ft at 7:30AM Sep 27, 2023Observed: 6.9 ft at 7:45AM Sep 27, 2023Observed: 6.9 ft at 8:00AM Sep 27, 2023Observed: 6.9 ft at 8:15AM Sep 27, 2023Observed: 6.9 ft at 8:30AM Sep 27, 2023Observed: 6.9 ft at 8:45AM Sep 27, 2023Observed: 6.9 ft at 9:00AM Sep 27, 2023Observed: 6.9 ft at 9:15AM Sep 27, 2023Observed: 6.9 ft at 9:30AM Sep 27, 2023Observed: 6.9 ft at 9:45AM Sep 27, 2023Observed: 6.9 ft at 10:00AM Sep 27, 2023Highest Observation: 6.91 ft at 10:15AM Sep 27, 2023Observed: 6.9 ft at 10:30AM Sep 27, 2023Observed: 6.9 ft at 10:45AM Sep 27, 2023Observed: 6.9 ft at 11:00AM Sep 27, 2023Observed: 6.9 ft at 11:15AM Sep 27, 2023Observed: 6.9 ft at 11:30AM Sep 27, 2023Observed: 6.9 ft at 11:45AM Sep 27, 2023Observed: 6.9 ft at 12:00PM Sep 27, 2023Observed: 6.9 ft at 1:15PM Sep 27, 2023Observed: 6.9 ft at 1:30PM Sep 27, 2023Observed: 6.9 ft at 1:45PM Sep 27, 2023Observed: 6.9 ft at 2:00PM Sep 27, 2023Observed: 6.9 ft at 2:15PM Sep 27, 2023Observed: 6.9 ft at 2:30PM Sep 27, 2023Observed: 6.9 ft at 2:45PM Sep 27, 2023Observed: 6.9 ft at 3:00PM Sep 27, 2023Observed: 6.9 ft at 3:15PM Sep 27, 2023Observed: 6.9 ft at 3:30PM Sep 27, 2023Observed: 6.9 ft at 3:45PM Sep 27, 2023Observed: 6.9 ft at 4:00PM Sep 27, 2023Observed: 6.9 ft at 4:15PM Sep 27, 2023Observed: 6.9 ft at 4:30PM Sep 27, 2023Observed: 6.9 ft at 4:45PM Sep 27, 2023Observed: 6.9 ft at 5:00PM Sep 27, 2023Observed: 6.9 ft at 5:15PM Sep 27, 2023Observed: 6.9 ft at 5:30PM Sep 27, 2023Observed: 6.9 ft at 5:45PM Sep 27, 2023Observed: 6.9 ft at 6:00PM Sep 27, 2023Observed: 6.9 ft at 6:15PM Sep 27, 2023Observed: 6.89 ft at 6:30PM Sep 27, 2023Observed: 6.89 ft at 6:45PM Sep 27, 2023Observed: 6.9 ft at 7:00PM Sep 27, 2023Observed: 6.9 ft at 7:15PM Sep 27, 2023Observed: 6.9 ft at 7:30PM Sep 27, 2023Observed: 6.9 ft at 7:45PM Sep 27, 2023Observed: 6.9 ft at 8:00PM Sep 27, 2023Observed: 6.9 ft at 8:15PM Sep 27, 2023Observed: 6.9 ft at 8:30PM Sep 27, 2023Observed: 6.9 ft at 8:45PM Sep 27, 2023Observed: 6.9 ft at 9:00PM Sep 27, 2023Observed: 6.9 ft at 9:15PM Sep 27, 2023Observed: 6.9 ft at 9:30PM Sep 27, 2023Observed: 6.9 ft at 9:45PM Sep 27, 2023Observed: 6.9 ft at 10:00PM Sep 27, 2023Observed: 6.9 ft at 10:15PM Sep 27, 2023Observed: 6.9 ft at 10:30PM Sep 27, 2023Observed: 6.9 ft at 10:45PM Sep 27, 2023Observed: 6.9 ft at 11:00PM Sep 27, 2023Observed: 6.9 ft at 11:15PM Sep 27, 2023Observed: 6.9 ft at 11:30PM Sep 27, 2023Observed: 6.9 ft at 11:45PM Sep 27, 2023Observed: 6.9 ft at 12:00AM Sep 28, 2023Observed: 6.9 ft at 12:15AM Sep 28, 2023Observed: 6.9 ft at 12:30AM Sep 28, 2023Observed: 6.89 ft at 12:45AM Sep 28, 2023Observed: 6.9 ft at 1:00AM Sep 28, 2023Observed: 6.89 ft at 1:15AM Sep 28, 2023Observed: 6.9 ft at 1:30AM Sep 28, 2023Observed: 6.9 ft at 1:45AM Sep 28, 2023Observed: 6.9 ft at 2:00AM Sep 28, 2023Observed: 6.9 ft at 2:15AM Sep 28, 2023Observed: 6.89 ft at 2:30AM Sep 28, 2023Observed: 6.9 ft at 2:45AM Sep 28, 2023Observed: 6.9 ft at 3:00AM Sep 28, 2023Observed: 6.89 ft at 3:15AM Sep 28, 2023Observed: 6.89 ft at 3:30AM Sep 28, 2023Observed: 6.89 ft at 3:45AM Sep 28, 2023Observed: 6.9 ft at 4:00AM Sep 28, 2023Observed: 6.9 ft at 4:15AM Sep 28, 2023Observed: 6.89 ft at 4:30AM Sep 28, 2023Observed: 6.89 ft at 4:45AM Sep 28, 2023Observed: 6.89 ft at 5:00AM Sep 28, 2023Observed: 6.89 ft at 5:15AM Sep 28, 2023Observed: 6.89 ft at 5:30AM Sep 28, 2023Observed: 6.89 ft at 5:45AM Sep 28, 2023Observed: 6.9 ft at 6:00AM Sep 28, 2023Observed: 6.9 ft at 7:15AM Sep 28, 2023Observed: 6.9 ft at 7:30AM Sep 28, 2023Observed: 6.9 ft at 7:45AM Sep 28, 2023Observed: 6.9 ft at 8:00AM Sep 28, 2023Observed: 6.9 ft at 8:15AM Sep 28, 2023Observed: 6.9 ft at 8:30AM Sep 28, 2023Observed: 6.9 ft at 8:45AM Sep 28, 2023Highest Observation: 6.91 ft at 9:00AM Sep 28, 2023Observed: 6.9 ft at 9:15AM Sep 28, 2023Observed: 6.9 ft at 9:30AM Sep 28, 2023Observed: 6.9 ft at 9:45AM Sep 28, 2023Observed: 6.9 ft at 10:00AM Sep 28, 2023Observed: 6.9 ft at 10:15AM Sep 28, 2023Observed: 6.9 ft at 10:30AM Sep 28, 2023Observed: 6.9 ft at 10:45AM Sep 28, 2023Observed: 6.9 ft at 11:00AM Sep 28, 2023Observed: 6.9 ft at 11:15AM Sep 28, 2023Observed: 6.9 ft at 11:30AM Sep 28, 2023Observed: 6.9 ft at 11:45AM Sep 28, 2023Observed: 6.9 ft at 12:00PM Sep 28, 2023Observed: 6.9 ft at 12:15PM Sep 28, 2023Observed: 6.9 ft at 12:30PM Sep 28, 2023Observed: 6.9 ft at 12:45PM Sep 28, 2023Observed: 6.9 ft at 1:00PM Sep 28, 2023Observed: 6.9 ft at 1:15PM Sep 28, 2023Highest Observation: 6.91 ft at 1:30PM Sep 28, 2023Observed: 6.9 ft at 1:45PM Sep 28, 2023Observed: 6.9 ft at 2:00PM Sep 28, 2023Observed: 6.9 ft at 2:15PM Sep 28, 2023Observed: 6.9 ft at 2:30PM Sep 28, 2023Observed: 6.9 ft at 2:45PM Sep 28, 2023Observed: 6.9 ft at 3:00PM Sep 28, 2023Observed: 6.9 ft at 3:15PM Sep 28, 2023Observed: 6.9 ft at 3:30PM Sep 28, 2023Observed: 6.9 ft at 3:45PM Sep 28, 2023Observed: 6.89 ft at 4:00PM Sep 28, 2023Observed: 6.9 ft at 4:15PM Sep 28, 2023Observed: 6.89 ft at 4:30PM Sep 28, 2023Observed: 6.89 ft at 4:45PM Sep 28, 2023Observed: 6.89 ft at 5:00PM Sep 28, 2023Observed: 6.9 ft at 5:15PM Sep 28, 2023Observed: 6.89 ft at 5:30PM Sep 28, 2023Observed: 6.89 ft at 5:45PM Sep 28, 2023Observed: 6.89 ft at 6:00PM Sep 28, 2023Observed: 6.9 ft at 6:15PM Sep 28, 2023Observed: 6.89 ft at 6:30PM Sep 28, 2023Observed: 6.89 ft at 6:45PM Sep 28, 2023Observed: 6.89 ft at 7:00PM Sep 28, 2023Observed: 6.9 ft at 7:15PM Sep 28, 2023Observed: 6.89 ft at 7:30PM Sep 28, 2023Observed: 6.89 ft at 7:45PM Sep 28, 2023Observed: 6.89 ft at 8:00PM Sep 28, 2023Observed: 6.89 ft at 8:15PM Sep 28, 2023Observed: 6.89 ft at 8:30PM Sep 28, 2023Observed: 6.89 ft at 8:31PM Sep 28, 2023Observed: 6.89 ft at 8:45PM Sep 28, 2023Observed: 6.89 ft at 8:46PM Sep 28, 2023Observed: 6.89 ft at 9:00PM Sep 28, 2023Observed: 6.89 ft at 9:01PM Sep 28, 2023Observed: 6.9 ft at 9:15PM Sep 28, 2023Observed: 6.89 ft at 9:30PM Sep 28, 2023Observed: 6.89 ft at 9:45PM Sep 28, 2023Observed: 6.89 ft at 10:00PM Sep 28, 2023Observed: 6.89 ft at 10:15PM Sep 28, 2023Observed: 6.89 ft at 10:30PM Sep 28, 2023Observed: 6.89 ft at 10:45PM Sep 28, 2023Observed: 6.89 ft at 11:00PM Sep 28, 2023Observed: 6.89 ft at 11:15PM Sep 28, 2023Observed: 6.89 ft at 11:30PM Sep 28, 2023Observed: 6.89 ft at 11:45PM Sep 28, 2023Observed: 6.89 ft at 12:00AM Sep 29, 2023Observed: 6.89 ft at 12:15AM Sep 29, 2023Observed: 6.89 ft at 12:30AM Sep 29, 2023Observed: 6.89 ft at 12:45AM Sep 29, 2023Observed: 6.89 ft at 1:00AM Sep 29, 2023Observed: 6.89 ft at 1:15AM Sep 29, 2023Observed: 6.89 ft at 1:30AM Sep 29, 2023Observed: 6.89 ft at 1:45AM Sep 29, 2023Observed: 6.89 ft at 2:00AM Sep 29, 2023Observed: 6.89 ft at 2:15AM Sep 29, 2023Observed: 6.89 ft at 2:30AM Sep 29, 2023Observed: 6.89 ft at 2:45AM Sep 29, 2023Observed: 6.89 ft at 3:00AM Sep 29, 2023Observed: 6.89 ft at 3:15AM Sep 29, 2023Observed: 6.89 ft at 3:30AM Sep 29, 2023Observed: 6.89 ft at 3:45AM Sep 29, 2023Observed: 6.89 ft at 4:00AM Sep 29, 2023Observed: 6.89 ft at 4:15AM Sep 29, 2023Observed: 6.89 ft at 4:30AM Sep 29, 2023Observed: 6.89 ft at 4:31AM Sep 29, 2023Observed: 6.89 ft at 4:45AM Sep 29, 2023Observed: 6.89 ft at 4:46AM Sep 29, 2023Observed: 6.89 ft at 5:00AM Sep 29, 2023Observed: 6.89 ft at 5:01AM Sep 29, 2023Observed: 6.89 ft at 5:15AM Sep 29, 2023Observed: 6.89 ft at 5:30AM Sep 29, 2023Observed: 6.88 ft at 5:45AM Sep 29, 2023Observed: 6.89 ft at 6:00AM Sep 29, 2023Observed: 6.88 ft at 6:15AM Sep 29, 2023Observed: 6.89 ft at 6:30AM Sep 29, 2023Observed: 6.89 ft at 6:45AM Sep 29, 2023Observed: 6.88 ft at 7:00AM Sep 29, 2023Observed: 6.89 ft at 7:15AM Sep 29, 2023Observed: 6.89 ft at 7:30AM Sep 29, 2023Observed: 6.89 ft at 7:45AM Sep 29, 2023Observed: 6.88 ft at 8:00AM Sep 29, 2023Observed: 6.89 ft at 8:15AM Sep 29, 2023Observed: 6.89 ft at 8:30AM Sep 29, 2023Observed: 6.89 ft at 8:45AM Sep 29, 2023Observed: 6.89 ft at 9:00AM Sep 29, 2023Observed: 6.89 ft at 9:15AM Sep 29, 2023Observed: 6.89 ft at 9:30AM Sep 29, 2023Observed: 6.89 ft at 9:45AM Sep 29, 2023Observed: 6.89 ft at 10:00AM Sep 29, 2023Observed: 6.89 ft at 10:15AM Sep 29, 2023Observed: 6.89 ft at 10:30AM Sep 29, 2023Observed: 6.89 ft at 10:45AM Sep 29, 2023Observed: 6.89 ft at 11:00AM Sep 29, 2023Observed: 6.89 ft at 11:15AM Sep 29, 2023Observed: 6.89 ft at 11:30AM Sep 29, 2023Observed: 6.89 ft at 11:45AM Sep 29, 2023Observed: 6.88 ft at 12:00PM Sep 29, 2023Observed: 6.89 ft at 12:15PM Sep 29, 2023Observed: 6.89 ft at 12:30PM Sep 29, 2023Observed: 6.89 ft at 12:31PM Sep 29, 2023Observed: 6.89 ft at 12:45PM Sep 29, 2023Observed: 6.89 ft at 12:46PM Sep 29, 2023Observed: 6.89 ft at 1:00PM Sep 29, 2023Observed: 6.89 ft at 1:01PM Sep 29, 2023Observed: 6.89 ft at 1:15PM Sep 29, 2023Observed: 6.89 ft at 1:30PM Sep 29, 2023Observed: 6.89 ft at 1:45PM Sep 29, 2023Observed: 6.89 ft at 2:00PM Sep 29, 2023Observed: 6.89 ft at 2:15PM Sep 29, 2023Observed: 6.89 ft at 2:30PM Sep 29, 2023Observed: 6.89 ft at 2:45PM Sep 29, 2023Observed: 6.89 ft at 3:00PM Sep 29, 2023Observed: 6.89 ft at 3:15PM Sep 29, 2023Observed: 6.89 ft at 3:30PM Sep 29, 2023Observed: 6.89 ft at 3:45PM Sep 29, 2023Observed: 6.89 ft at 4:00PM Sep 29, 2023Observed: 6.89 ft at 4:15PM Sep 29, 2023Observed: 6.89 ft at 4:30PM Sep 29, 2023Observed: 6.89 ft at 4:45PM Sep 29, 2023Observed: 6.89 ft at 5:00PM Sep 29, 2023Observed: 6.89 ft at 5:15PM Sep 29, 2023Observed: 6.89 ft at 5:30PM Sep 29, 2023Observed: 6.89 ft at 5:45PM Sep 29, 2023Observed: 6.88 ft at 6:00PM Sep 29, 2023Observed: 6.88 ft at 6:15PM Sep 29, 2023Observed: 6.89 ft at 6:30PM Sep 29, 2023Observed: 6.89 ft at 6:45PM Sep 29, 2023Observed: 6.89 ft at 7:00PM Sep 29, 2023Observed: 6.89 ft at 7:15PM Sep 29, 2023Observed: 6.88 ft at 7:30PM Sep 29, 2023Observed: 6.89 ft at 7:45PM Sep 29, 2023Observed: 6.89 ft at 8:00PM Sep 29, 2023Observed: 6.88 ft at 8:15PM Sep 29, 2023Observed: 6.89 ft at 8:30PM Sep 29, 2023Observed: 6.88 ft at 8:45PM Sep 29, 2023Observed: 6.89 ft at 9:00PM Sep 29, 2023Observed: 6.88 ft at 9:15PM Sep 29, 2023Observed: 6.88 ft at 9:30PM Sep 29, 2023Observed: 6.89 ft at 9:45PM Sep 29, 2023Observed: 6.88 ft at 10:00PM Sep 29, 2023Observed: 6.89 ft at 10:15PM Sep 29, 2023Observed: 6.89 ft at 10:30PM Sep 29, 2023Observed: 6.88 ft at 10:45PM Sep 29, 2023Observed: 6.88 ft at 11:00PM Sep 29, 2023Observed: 6.88 ft at 11:15PM Sep 29, 2023Observed: 6.88 ft at 11:30PM Sep 29, 2023Observed: 6.88 ft at 11:45PM Sep 29, 2023Observed: 6.88 ft at 12:00AM Sep 30, 2023Observed: 6.88 ft at 12:15AM Sep 30, 2023Observed: 6.88 ft at 12:30AM Sep 30, 2023Observed: 6.88 ft at 12:45AM Sep 30, 2023Observed: 6.88 ft at 1:00AM Sep 30, 2023USGS--Water Resources of the United StatesGCOS2(plotting HGIRG) Graph Created (2:24AM Sep 30, 2023)ObservedLatest observed value: 6.88 ft at 1:00 AM MDT 30-Sep-2023. Flood Stage is 9.5 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts are not available for the Grace Coolidge Creek near Custer. Only observed stages are available for this point.
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) 7.19 ft on 05/31/2022
(2) 7.26 ft on 12/29/2021
(3) 7.67 ft on 05/23/2021
(4) 7.31 ft on 05/17/2020
(5) 7.52 ft on 10/31/2019
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.
Zoom Level:14
KML Image
Gauge LocationGauge Map Marker
 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 Collapse
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 Collapse

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:
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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
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