Snow Water Equivalent Watershed Maps and Reports

Snow water equivalent (SWE) values are derived from measurements taken at snow course and SNOTEL data stations. The amount of water contained in the snow columns are measured and expressed as percent of average and summarized by watershed. Snow water equivalent maps are available for the first of each month from January through June beginning in 2002.

View a map by choosing the month and year of interest from the dropdown box or by selecting from the thumbnails below. Asterisk (*) denotes missing map.

June 2014          Download Report          Download Map

Legend (% of Normal)

Extremely Above Average (Over 150)
Much Above Average (131-150)
Above Average (111-130)
Near Average (91-110)
Below Average (71-90)
Much Below Average (51-70)
Extremely Below Average (Below 51)
    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.

    Natural Resource Conservation Service

    For additional information, contact:
    Brian Domonkos, Water Supply Specialist
    Natural Resources Conservation Service
    brian.domonkos@mt.usda.gov
    (406) 587-6991