United States Department of Agriculture
Natural Resources Conservation Service
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MONTANA SNOTEL Snow Water Equivalent Update Graph

As of SATURDAY: MAY 8 , 2021

BasinSnow Water Equivalent Percent of Median
KOOTENAI RIVER BASINPercentage Bar 68% 68%
FLATHEAD RIVER BASINPercentage Bar 85% 85%
UPPER CLARK FORK RIVER BASINPercentage Bar 83% 83%
BITTERROOT RIVER BASINPercentage Bar 80% 80%
LOWER CLARK FORK RIVER BASINPercentage Bar 76% 76%
JEFFERSON RIVER BASINPercentage Bar 61% 61%
MADISON RIVER BASINPercentage Bar 71% 71%
GALLATIN RIVER BASINPercentage Bar 85% 85%
MISSOURI HEADWATERSPercentage Bar 68% 68%
HELENA VALLEYPercentage Bar 64% 64%
SMITH, JUDITH, AND MUSSELSHELL RIVER BASINSPercentage Bar 82% 82%
SUN, TETON AND MARIAS RIVER BASINSPercentage Bar 96% 96%
MISSOURI MAINSTEM RIVER BASINPercentage Bar 84% 84%
ST MARYS RIVER BASINPercentage Bar 106% 106%
MILK RIVER BASIN*
UPPER YELLOWSTONE RIVER BASINPercentage Bar 82% 82%
WIND RIVER BASIN (WYOMING)Percentage Bar 89% 89%
SHOSHONE RIVER BASIN (WYOMING)Percentage Bar 65% 65%
BIGHORN RIVER BASIN (WYOMING)Percentage Bar 91% 91%
TONGUE RIVER BASIN (WYOMING)Percentage Bar 118% 118%
POWDER RIVER BASIN (WYOMING)Percentage Bar 127% 127%
LOWER YELLOWSTONE RIVER BASINPercentage Bar 98% 98%

Legend: Percentage Bar Below 70% <70% Percentage Bar 70-90% 70-90% Percentage Bar 91-110% 91-110% Percentage Bar 111-130% 111-130% Percentage Bar Above 130% >130%

* = Data are not available or data may not provide a valid measure of conditions for over half of the sites within the basin.

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