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MONTANA SNOTEL Year-to-Date Precipitation Update Graph



As of THURSDAY: OCTOBER 21 , 2021
BasinYear-to-Date Precipitation Percent of Average
KOOTENAI RIVER BASINPercentage Bar 37% 37%
FLATHEAD RIVER BASINPercentage Bar 22% 22%
UPPER CLARK FORK RIVER BASINPercentage Bar 42% 42%
BITTERROOT RIVER BASINPercentage Bar 35% 35%
LOWER CLARK FORK RIVER BASINPercentage Bar 41% 41%
JEFFERSON RIVER BASINPercentage Bar 147% 147%
MADISON RIVER BASINPercentage Bar 157% 157%
GALLATIN RIVER BASINPercentage Bar 139% 139%
MISSOURI HEADWATERSPercentage Bar 132% 132%
HELENA VALLEYPercentage Bar 94% 94%
SMITH, JUDITH, AND MUSSELSHELL RIVER BASINSPercentage Bar 55% 55%
SUN, TETON AND MARIAS RIVER BASINSPercentage Bar 25% 25%
MISSOURI MAINSTEM RIVER BASINPercentage Bar 42% 42%
ST MARYS RIVER BASINPercentage Bar 15% 15%
MILK RIVER BASIN*
UPPER YELLOWSTONE RIVER BASINPercentage Bar 85% 85%
WIND RIVER BASIN (WYOMING)Percentage Bar 177% 177%
SHOSHONE RIVER BASIN (WYOMING)Percentage Bar 38% 38%
BIGHORN RIVER BASIN (WYOMING)Percentage Bar 109% 109%
TONGUE RIVER BASIN (WYOMING)*
POWDER RIVER BASIN (WYOMING)*
LOWER YELLOWSTONE RIVER BASINPercentage Bar 109% 109%

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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