United States Department of Agriculture
Natural Resources Conservation Service		 Montana Go to Accessibility Information
Skip to Page Content

Weekly SNOTEL Snowpack Comparison Tables

Data from 138 SNOTEL sites. SWE = Snow Water Equivalent.

May 11, 2009
Basin This Year Percent of Average This Week versus Last Week Last Year Percent of Average This Year as Percent of Last Year
Kootenai 102% 6% 141% 72%
Flathead 103% 7% 124% 83%
Upper Clark Fork 130% 12% 106% 123%
Bitterroot 118% 10% 149% 79%
Lower Clark Fork 111% 12% 149% 74%
Jefferson 133% 9% 113% 118%
Madison 124% 8% 122% 102%
Gallatin 140% 15% 126% 111%
Missouri Headwaters 132% 10% 121% 109%
Headwaters Mainstem 145% 16% 105% 138%
Smith,Judith,Musselshell 150% 17% 127% 118%
Sun,Teton,Marias 119% 11% 125% 95%
Missouri Mainstem 136% 14% 121% 112%
St. Mary 77% 1% 113% 68%
Upper Yellowstone 126% 6% 118% 107%
Lower Yellowstone 111% 3% 110% 101%
State-wide 122% 10% 123% 99%


May 18, 2009
Basin This Year Percent of Average This Week versus Last Week Last Year Percent of Average This Year as Percent of Last Year
Kootenai 110% 8% 140% 79%
Flathead 112% 9% 126% 89%
Upper Clark Fork 143% 13% 104% 138%
Bitterroot 117% -1% 146% 80%
Lower Clark Fork 126% 15% 163% 77%
Jefferson 133% 0% 105% 127%
Madison 126% 2% 124% 102%
Gallatin 144% 4% 132% 109%
Missouri Headwaters 134% 2% 119% 113%
Headwaters Mainstem 162% 17% 98% 165%
Smith, Judith, Musselshell 175% 25% 128% 137%
Sun, Teton, Marias 122% 3% 123% 99%
Missouri Mainstem 151% 15% 118% 128%
St. Mary 81% 5% 110% 74%
Upper Yellowstone 126% 0% 118% 107%
Lower Yellowstone 105% -6% 110% 95%
State-wide 129% 7% 123% 105%


May 25, 2009
Basin This Year Percent of Average This Week versus Last Week Last Year Percent of Average This Year as Percent of Last Year
Kootenai 108% -2% 139% 78%
Flathead 109% -3% 134% 81%
Upper Clark Fork 133% -10% 111% 120%
Bitterroot 116% -1% 152% 76%
Lower Clark Fork 119% -7% 175% 68%
Jefferson 112% -21% 114% 98%
Madison 114% -12% 139% 82%
Gallatin 130% -14% 149% 87%
Missouri Headwaters 116% -18% 132% 88%
Headwaters Mainstem 138% -24% 131% 105%
Smith, Judith, Musselshell 153% -22% 161% 95%
Sun, Teton, Marias 101% -21% 168% 60%
Missouri Mainstem 125% -26% 156% 80%
St. Mary 81% 0% 117% 70%
Upper Yellowstone 111% -15% 132% 84%
Lower Yellowstone 77% -28% 135% 57%
State-wide 115% -14% 140% 82%


June 1, 2009
Basin This Year Percent of Average This Week versus Last Week Last Year Percent of Average This Year as Percent of Last Year
Kootenai 79% -29% 124% 64%
Flathead 92% -17% 133% 69%
Upper Clark Fork 112% -21% 118% 95%
Bitterroot 79% -37% 147% 54%
Lower Clark Fork 81% -38% 175% 46%
Jefferson 91% -21% 126% 72%
Madison 89% -25% 163% 55%
Gallatin 100% -30% 160% 63%
Missouri Headwaters 91% -25% 147% 62%
Headwaters Mainstem 108% -30% 150% 72%
Smith, Judith, Musselshell 96% -57% 178% 54%
Sun, Teton, Marias 65% -36% 185% 35%
Missouri Mainstem 83% -42% 171% 49%
St. Mary 74% -8% 118% 62%
Upper Yellowstone 87% -24% 148% 59%
Lower Yellowstone 53% -24% 160% 33%
State-wide 86% -29% 150% 57%

< Back to Current Water Year Data

Last Modified: 06/01/2009