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Water Supply & Reservoir Storage

Water Supply Outlook Reports (WSOR)

  • Idaho and ALL Western States WSOR  (current & historic reports available - HTML and text versions)
  • Idaho WSOR in Adobe PDF format
       The following documents require Adobe Acrobat.
       Adobe Acrobat Document

       Adobe Acrobat Document Idaho WSOR Streamflow Adjustments and Reservoir Capacity Definitions (167 KB)

  • Idaho WSOR Email Notification - To receive email notification when the latest issue has been published to the web please contact us.

  • New Latest information about changing the 30-year period for climactic "normals" or averages.
    The following document requires Adobe Acrobat.
    Adobe Acrobat Document Monthly Site and Basin Comparison Table of Old vs. New Normals:   January 1 (96 kb) | February 1 (96 kb)
  • Adobe Acrobat Document NRCS Idaho 1981-2010 New Normal Explanation  (406 KB)

Drought and Surface Water Supply Index (SWSI)

Streamflow Forecasts

Monthly Snowpack and Streamflow Maps

Peak Streamflow for Individual Basins

Water Supply Presentations given by Idaho Snow Survey Staff

    The following documents require Adobe Acrobat.

    Adobe Acrobat Document

More Information about Water Supply Forecast Products

Last Modified: 02/12/2013