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News Release

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Scott Oviatt

406-587-6844


February 1 Mountain Snowpack Remains Above Average

February 1 Mountain Snowpack Remains Above Average and Well Above Last Year


Bozeman--The Natural Resources Conservation Service announced that above average mountain precipitation for the third consecutive month has resulted in February 1 mountain snowpack being above average and well above last year. January mountain precipitation west of the Divide was 131 percent of average and east of the Divide was 110 percent of average.

The first of February is when we are at 65 percent of our seasonal snowpack maximum west of the Divide and 63 percent of our seasonal snowpack maximum east of the Divide. State-wide mountain snow water contents were 113 percent of average and 154 percent of 2010. West of the Divide snowpack was 113 percent of average and 157 percent of last year and east of the Divide snowpack was 111 percent of average and 149 percent of last year.

Snow Water Content
River Basin Percent of Average Percent of Last Year January percent Change
Columbia 113 157 +7
Kootenai, Montana 107 142 +6
Kootenai, Canada 94 111 -
Flathead, Montana 121 159 +10
Flathead, Canada 110 162 -
Upper Clark Fork 112 154 +2
Bitterroot 103 183 +9
Lower Clark Fork 116 182 +4
Missouri 113 142 0
Missouri Headwaters 109 143 -8
 - Jefferson 107 135 -3
 - Madison 109 154 -12
 - Gallatin 113 144 -3
Missouri Mainstem 109 143 +1
 - Headwaters Mainstem 104 117 -2
 - Smith-Judith-Musselshell 119 125 +2
 - Sun-Teton-Marias 93 146 +3
 - Milk 233 183 -
 -- Milk (Bearpaw Mountains) 203 243 +69
 -- Milk (Cypress Hills, Canada) 257 159 -
St. Mary 108 139 +14
St. Mary & Milk 155 161 +52
Yellowstone 110 158 -4
Upper Yellowstone 115 161 -6
Lower Yellowstone 106 159 -1
State-Wide 113 154 +1

If you encounter any problems with the files provided on this page, please contact Scott.Oviatt at .

See the following text document for detailed basin snowpack information:

Basin-Wide Snowpack Summary (TXT; 64 KB)

Assuming near average precipitation, Montana streamflows are forecast at 107 percent of average. West of the Continental Divide streamflows are forecast at 112 percent of average. East of the Continental Divide streamflows are forecast at 104 percent of average.

Below are averaged river basin streamflow forecast summaries for the period April 1 through July 31. These forecasts assume near normal spring conditions and do not account well below average (70 percent or less) or well above average (130 percent or more) snowmelt or spring rain.

Streamflow Forecasts
River Basin April to July this Year Percent of Average April to July Last Year Percent of Average
Columbia 112 69
-- Kootenai 101 66
-- Flathead 123 75
-- Upper Clark Fork 107 69
-- Bitterroot 105 56
-- Lower Clark Fork 110 65
Missouri 106 68
-- Jefferson 102 57
-- Madison 99 71
-- Gallatin 103 74
-- Missouri Mainstem 102 61
-- Smith-Judith-Musselshell 115 84
-- Sun-Teton-Marias 97 67
-- Milk 148 79
St. Mary 107 85
Yellowstone 101 65
-- Upper Yellowstone 105 72
-- Lower Yellowstone 97 53
State-Wide 107 68

NOTE: The "April to July Last Year Percent of Average" column above is what was forecast last year, NOT what actually occurred.

See the following text document for detailed basin streamflow forecast information:

Provisional Water Supply Forecasts (TXT; 24 KB)

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