NRCS Monthly Maps and Data
(Snowpack, Precipitation, Reservoir Storage and Streamflow Forecasts)
All maps shown below are interactive. Select individual basins to view the basin totals, view sites used in the calculations, or download data. In addition to the basin data, you can also select individual SNOTEL sites, snowcourses, reservoirs and streamflow points to view information related to the metric selected in the menu bar.
Volumetric Streamflow Forecasts for the spring and summer are issued monthly between March 1st and June 1st for streamgages in Montana. Forecasts will be issued by the fifth business day of each month and will be available for access in the chart tool below.