View 2016 statewide maps of Surface Water Supply Index, Snow Water Equivalent, Precipitation, Streamflow Forecast, and Reservoir Levels
View 2016 individual basin maps of Streamflow Forecasts, Snow Water Equivalent, Precipitation, and Reservoir Levels
View pre-2016 Snow and Water Supply Maps
Page History
A A A A
The Montana State Library utilizes the ePass system for application login. You will be temporarily redirected to the secure Montana.gov website for authentication.
If you previously used a login to access State Library services, you will have an opportunity to connect that information with our updated system.
These maps are produced in partnership with the NRCS. Data are compiled by the Montana Snow Survey Program of the USDA Natural Resources Conservation Service. Please see the NRCS web site for explanations of their data collection programs. For additional information, contact: Lucas Zukiewicz, Hydrologist Natural Resources Conservation Service Lucas.Zukiewicz@mt.usda.gov (406) 587-6843
Map Gallery
