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 Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

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 Great Falls, MT

Missouri Basin River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (MST) Datum: Not Available Metadata

NOTE: Stage data may not be available during winter months. NOTE: Forecasts are not available for the Saint Mary Canal near Babb at St Mary Crossing. Only observed stages are available for this point.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Upstream Gauge

Flood Categories (in feet) Not Available Historic Crests (P): Preliminary values subject to further review. 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: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.

About This Location

Latitude: 48.947222° N, Longitude: 113.374444° 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) Elevation (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 Other 4450 Not Available   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Babb at St Mary Crossing

Additional Information

Gauge readings available seasonally. Data unavailable during winter months.

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary MBRFC - Missouri Basin River Forecast Center Upper Missouri Reservoir Inflow Forecasts Milk River Reservoir Inflow Forecasts Water Supply Outlook for the Missouri Basin Great Falls Hydrograph Composite Montana East of Divide Hydrograph Composite Glossary Basin Composites - SNOTEL/Flow/Stage CRREL Map of Current Ice Jams

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management NWS - Great Falls Home Page USGS - Montana Daily Streamflow Conditions NRCS - Current Snow and Precipitation Data NOHRSC - Snow Information Montana Drought Information NOAA Drought Information Center Montana Ice Jam Awareness Flood Safety Awareness Week March 14-19, 2016 Video: USGS Streamgages - The Silent Superheroes FEMA National Flood Insurance Program

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 Great Falls Weather Forecast Office 5324 Tri-Hill Frontage Rd Great Falls, MT 59404-4933 (406) 453-2081 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:28 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities