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News Release

March 1 Snowpack Continues Above Average Trend

Contact:
Scott Oviatt
406-587-6844


 


Bozeman--The Natural Resources Conservation Service announced that March 1 mountain snowpack remains above average for the fourth straight month. Snowpack values in all areas are well above last year at this time. February mountain precipitation was near average and was the fourth month in a row with average to above average accumulated precipitation. February mountain precipitation west of the Divide was 106 percent of average and east of the Divide was 105 percent of average.

On March 1, seasonal snowpack accumulation west of the divide should be about 82 percent and east of the divide should be about 75 percent. Seasonal snowpack peaks are typically reached the first to middle of April. Statewide mountain snowpack was 113 percent of average and 165 percent of last year at this time. West of the Divide, snowpack was 114 percent of average and 177 percent of last year and east of the Divide, snowpack was 110 percent of average and 153 percent of last year.

Snow Water Content
River Basin Percent of Average Percent of Last Year February percent Change
Columbia 114 177 +1
Kootenai, Montana 117 176 +10
Kootenai, Canada 100 134 +6
Flathead, Montana 123 175 +2
Flathead, Canada 136 139 +26
Upper Clark Fork 110 171 -2
Bitterroot 103 198 --
Lower Clark Fork 117 218 +1
Missouri 111 147 -2
Missouri Headwaters 105 147 -4
 - Jefferson 103 142 -4
 - Madison 103 161 -6
 - Gallatin 112 141 -1
Missouri Mainstem 124 147 +15
 - Headwaters Mainstem 110 140 +6
 - Smith-Judith-Musselshell 126 123 +7
 - Sun-Teton-Marias 104 195 +11
 - Milk 216 150 -17
 -- Milk (Bearpaw Mountains) 185 179 -18
 -- Milk (Cypress Hills, Canada) 240 137 -17
St. Mary 111 158 +3
St. Mary and Milk 144 154 -11
Yellowstone 108 157 -2
Upper Yellowstone 112 159 -3
Lower Yellowstone 103 160 -3
Statewide 113 165 --

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)

Streamflows across Montana are forecast to be 109 percent of average. West of the Divide, streamflows are forecast to be 114 percent of average and east of the Divide, streamflows are forecast to be 106 percent of average.

Below are averaged streamflow forecasts, by river basin, for the period April 1 through July 31. These forecasts assume near normal spring conditions and do not account for 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 114 62
-- Kootenai 106 63
-- Flathead 124 72
-- Upper Clark Fork 109 60
-- Bitterroot 106 51
-- Lower Clark Fork 112 53
Missouri 111 64
-- Jefferson 96 52
-- Madison 96 68
-- Gallatin 105 75
-- Missouri Mainstem 102 58
-- Smith-Judith-Musselshell 121 81
-- Sun-Teton-Marias 111 60
-- Milk 164 75
St. Mary 112 78
Yellowstone 99 60
-- Upper Yellowstone 102 68
-- Lower Yellowstone 96 50
Statewide 109 63

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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