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Water Supply & Reservoir Storage

Oregon Water Supply Outlook Reports & Streamflow Forecasting

The June 1, 2020 Water Supply Outlook Report (WSOR) is now available.

WSOR Cover Image

The following documents require Adobe Acrobat.

Click here to view the June 1 WSOR Report   

Retrieve Oregon WSOR publication in PDF format (PDF version available 2006-current):




Retrieve historic Oregon WSOR publication in text format (text version available 1990-2013):

  • Water Supply Outlook Reports (WSOR)  (Released monthly Jan-Jun by state, current & historic reports available)

  • Western US Streamflow Forecast Maps

  • Western US Streamflow Forecast Tables

  • Daily Water Supply Forecasts  (For selected stations):

  • Historic Streamflow Table for Discontinued Forecasts in the Willamette Basin (pdf)

  • Guide to Interpreting Streamflow Forecasts

Reservoir Storage