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.
Downloads for Great Falls, MT (TFX)
While the AHPS display allows for the use of interactive toggles with the image, AHPS data can also be utilized within GIS software.
This page links to "Shapefiles" and "KMZ" files (generated every 15 minutes) which are compressed "KML" files compatible with several
GIS software applications. A list of some of the software applications that support Shapefiles and KML can be found
or, visit the
NWS website Standards Description Website
which explains KML in more detail.
Recently, the downloadable observations and forecast files have changed.
Click here to see a summary of the changes.
- No observed shapefile files available at this time.
- No observed kmz files available at this time.
- No forecast shapefile files available at this time.
- No forecast kmz files available at this time.
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