Water Supply & Reservoir Storage

Streamflow Forecasting

• Water Supply Outlook Reports  (Released monthly by state, current & historic reports available)
• Montana Streamflow Forecast Tables (1st of Month) (Text file)
• Montana Streamflow Forecast Charts (1st of Month)
• Montana Updated Volume Forecast Tables (Text file)

• Daily Guidance Streamflow Forecasts Using SNOTEL Data - NEW

• Streamflow Forecast Maps for: Montana | Western US
• Streamflow Forecast Tables for: Montana | Western US
• Streamflow Forecast Probability Charts  (For selected stations in each state)
• Guide to Interpreting Streamflow Forecasts
• Snowmelt Peak Streamflow Forecast Graphs
• Snowmelt Peak Streamflow Dates Forecast Table
• Snowmelt Peak Streamflow Volume Forecast Table
• Low Flow Forecasts

Reservoir Storage

• Current Montana Reservoir Storage Graphic
• Water Year Reservoir Storage Graphs for Montana (List-based access by month)
• Current Western US Reservoir Storage Graphic
• Historic Western US Reservoir Storage Graphics 
• Monthly Reservoir Reports  (Format types: BARE, BARS)

Surface Water Supply Index (SWSI)

• Surface Water Supply Index Maps and Tables [Montana Natural Resource Information System (NRIS) web site]

Last Modified: 02/12/2007