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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit 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.

Hydrograph River at a Glance Download
Missouri River at Fort Peck Reservoir Pool (ft)Observed: 2229.26 ft at 11:00PM Nov 27, 2023Observed: 2229.25 ft at 11:00PM Nov 28, 2023Observed: 2229.3 ft at 11:00PM Nov 29, 2023Observed: 2229.28 ft at 11:00PM Nov 30, 2023Observed: 2229.29 ft at 11:00PM Dec 01, 2023Highest Observation: 2229.36 ft at 11:00PM Dec 02, 2023Observed: 2229.33 ft at 11:00PM Dec 03, 2023Observed: 2229.32 ft at 11:00PM Dec 04, 2023Observed: 2229.25 ft at 11:00PM Dec 05, 2023FPKM8(plotting HPIRZ) Graph Created (10:35PM Dec 6, 2023)ObservedLatest observed value: 2229.25 ft at 11:00 PM MST 5-Dec-2023.
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About this graph
Tabular Data (UTC)
Tabular Data (MST)
XML Data
RSS Files
Datum: Not Available
NOTE: Forecasts are not available for the Missouri River at Fort Peck Reservoir. Only observed stages are available for this point.
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Upstream Gauge - near Landusky Upstream Gauge Downstream Gauge Downstream Gauge - near Wolf Point
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 0
Low Stage (in feet): 0

Historic Crests
(1) 2,252.20 ft on 06/17/2011
(2) 2,251.60 ft on 07/14/1975
(3) 2,250.31 ft on 07/23/1997
(4) 2,249.60 ft on 06/20/1978
(5) 2,249.00 ft on 07/12/1976
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(P): Preliminary values subject to further review.

Recent Crests
(1) 2,247.87 ft on 07/04/2018
(2) 2,252.20 ft on 06/17/2011
(3) 2,250.31 ft on 07/23/1997
(4) 2,247.30 ft on 07/04/1996
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2,167.40 ft on 01/25/1956
(2) 2,196.30 ft on 02/28/2007
(3) 2,198.30 ft on 01/31/2005
Zoom Level:11
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Gauge LocationGauge Map Marker
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.
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If you notice any errors in the below information, please contact our Webmaster
2250 This level is the top of the spillway gates.
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Latitude: 48.011944° N, Longitude: 106.411667° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available 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
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Hydrologic Resources Additional Resources
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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
Glasgow Weather Forecast Office
92 Airport Road
Glasgow, MT 59230
(406) 228-4042
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Page last modified: 2-Nov-2020 7:28 PM
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