National Weather Service
|National Operational Hydrologic
Remote Sensing Center
GIS Data Sets
The NOHRSC provides and maintains the NWS Integrated Hydrologic Automated Basin Boundary System (IHABBS) GIS database to support river and flood forecasting throughout the nation. Basin boundary data sets and RFC boundaries are provided here in shapefiles that have been tarred and gzipped.
Rudimentary metadata information for basin shapefiles can be found here.
The following data sets are also used on the Interactive Snow Information page:
The Rivers and Streams coverage (based on the EPA RF1 dataset) is also available by River Forecast Center regions:
Notes for Internet Explorer users
Some versions of Internet Explorer will attempt to rename the suffix of the saved shapefile to .tar.tar, instead of the original .tar.gz.
Make sure the saved shapefile keeps the .tar.gz suffix, renaming the file if necessary. Otherwise, the unzipping software might not be able to read it.
Same with the KMZ files. Make sure that the web browser keeps the .kmz suffix, renaming the file if necessary.
The identification of ski locations are purely intended as informational with no implied endorsement. For further information on these ski areas, you will need to contact them directly. The locations shown are those we are aware of at the present time. To request the addition of another ski area to the GIS dataset please contact us.