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Water Year snowpack trend graphs are available for the current water year October 1st through July, or as conditions warrant.
If you encounter any problems with the files provided on this page, please contact Lucas Zukiewicz at 406-587-6843.
MontanaKootenai River BasinFlathead River BasinBlackfoot River BasinUpper Clark Fork River BasinBitterroot River BasinLower Clark Fork River BasinJefferson River BasinMadison River BasinGallatin River Basin above Gallatin GatewayHyalite CreekBridger CreekGallatin River BasinMissouri Headwaters River BasinMissouri Mainstem River BasinHeadwaters Missouri Mainstem River BasinSmith-Judith-Musselshell River BasinsSun-Teton-Marias River BasinsMissouri River BasinSt. Mary and Milk River BasinsWind River BasinShoshone River BasinBig Horn River BasinUpper Yellowstone River BasinTongue River BasinPowder River BasinLower Yellowstone River BasinYellowstone River Basin
For a detailed explanation of the new trend graph format using the non-exceedance projections see How To Read Non-Exceedance Projections Graphs.
Please note the following basins do not have graphs prior to water year 2012:
See Wyoming Basin Forecast Trends on the Wyoming Snow Survey web site for the following basins affecting Montana:
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