Daily Guidance Streamflow Forecasts Using SNOTEL Data

Disclaimer:  This is a completely automated unofficial experimental product based on SNOTEL data. This product is not meant to replace or supercede the official forecasts produced in coordination with the National Weather Service. Official forecasts can be found at State Basin Outlook Reports.

If you encounter any problems with the files provided on this page, please contact Water Supply Specialist at 406-587-6991.

The following document requires Adobe Reader format.

Development and Interpretation of Daily Seasonal Water Supply Forecasts (PDF; 240 KB)

The following document requires Microsoft Excel. Percent & Skill, Exceedance Forecasts, and Scatter Graphs are graphs derived from the Summary Output document.

Summary Output (XLS; 68 KB)

• Big Goose Creek near Sheridan Wyoming
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 41 KB)  
• Big Hole River near Wisdom
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 41 KB)  
• Bighorn River near St. Xavier
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 41 KB)  
• Bitterroot River near Darby
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)  
• Blackfoot River near Bonner
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Boysen Reservoir Inflow, Wyoming
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Buffalo Bill Reservoir Inflow, Wyoming
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Clark Canyon Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Ennis Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Flathead Lake Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Gallatin River near Gateway
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Gallatin River near Logan
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Gibson Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Hebgen Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Hyalite Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Lake Sherburne Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Lima Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Little Goose Creek near Big Horn Wyoming
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Lower Willow Creek Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 41 KB)
• Marias River near Shelby
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 41 KB)
• Middle Fork Flathead River near West Glacier
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Mission Creek near St. Ignatius
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Missouri River at Toston
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Musselshell River at Harlowton
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Musselshell River near Roundup
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Nevada Creek near Helmville
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 42 KB)
• Powder River at Moorehead
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 42 KB)
• South Crow Creek near Ronan
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 42 KB)
• South Fork Jocko River near Arlee
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 42 KB)
• Swift Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 42 KB)
• Tongue River near Dayton Wyoming
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Tongue River Reservoir Inflow
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Yellowstone at Lake Outlet
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 43 KB)
• Yellowstone River at Corwin Springs
      Percent & Skill  |  Exceedance Forecasts  |  Scatter Graphs  | Excel Data (XLS; 42 KB)

Last Modified: 09/14/2009