February 1, 2017 Spring and Summer Streamflow Forecasts
Missouri River Basin Mountain Snowpack as of February 1, 2017
Upper Missouri Basin
THE HIGH ELEVATION SNOW PACK IN THE UPPER MISSOURI BASIN AS OF
FEBRUARY 1 WAS BELOW AVERAGE. THE SNOW PACK ABOVE FORT PECK,
MONTANA WAS 75 PERCENT. THE SNOW PACK IN THE ST MARY BASIN WAS 81
PERCENT, AND THE MILK RIVER BASIN WAS 61 PERCENT.
JANUARY PRECIPITATION ACROSS THE UPPER MISSOURI BASIN WAS MAINLY
NEAR TO ABOVE AVERAGE. BASIN PRECIPITATION SUMMARIES FOR THE
MISSOURI BASIN INCLUDE: MILK ST. MARY, 51 PERCENT; MILK CANADA,
122 PERCENT;LOWER MILK, 90 PERCENT; ABOVE TOSTON, 89 PERCENT;
TOSTON TO FT. PECK, 132 PERCENT.
January 2017 Upper Missouri Mean Precip Oct-Jan WY2017 Upper Missouri Mean Precip
STREAM FLOW IN THE UPPER MISSOURI BASIN IS FORECAST TO BE
BELOW AVERAGE DURING THE UPCOMING SPRING AND SUMMER. THE ST.
MARY RIVER IS FORECAST TO HAVE 85 PERCENT OF AVERAGE APRIL-SEPTEMBER
FLOWS. RUNOFF IS EXPECTED TO RANGE AROUND 98 PERCENT OF AVERAGE
FOR THE MISSOURI BASIN ABOVE FORT PECK, MONTANA.
Upper Missouri February 1, 2017 Spring and Summer Streamflow Forecasts
OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA: LIMA RESERVOIR
HAD 118 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 79 PERCENT OF
AVERAGE WATER, GIBSON RESERVOIR HAD 80 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 127 PERCENT OF AVERAGE STORED WATER.
THE MAJOR HYDROELECTRIC RESERVOIRS IN MONTANA (CANYON FERRY AND
FORT PECK) HAD MONTHEND STORAGE IN THE AVERAGE TO ABOVE AVERAGE
RANGE; 93 AND 116 PERCENT OF AVERAGE WATER, RESPECTIVELY.
Yellowstone Basin
THE HIGH ELEVATION SNOW PACK IN THE YELLOWSTONE BASIN WAS ABOVE
AVERAGE ON FEBRUARY 1. THE SNOW PACK IN THE UPPER YELLOWSTONE BASIN WAS
105 PERCENT OF AVERAGE. THE SNOW PACKS IN THE WIND, BIGHORN, AND
SHOSHONE BASINS WERE 168, 98, AND 123 PERCENT OF AVERAGE,
RESPECTIVELY. THE SNOW PACKS IN THE TONGUE AND POWDER BASINS WERE
103 AND 90 PERCENT OF AVERAGE, RESPECTIVELY.
PRECIPITATION DURING JANUARY WAS ABOVE AVERAGE. THE UPPER
YELLOWSTONE RIVER BASIN RECEIVED 119 PERCENT OF AVERAGE PRECIPITATION
WHILE THE LOWER YELLOWSTONE BASIN REPORTED 133 PERCENT OF AVERAGE.
THE BIGHORN BASIN RECEIVED 180 PERCENT OF AVERAGE PRECIPITATION
WHILE THE WIND RIVER BASIN RECEIVED 283 PERCENT OF AVERAGE.
THE LITTLE BIGHORN - UPPER TONGUE BASIN RECEIVED 134 PERCENT OF
AVERAGE AND THE POWDER RIVER HAD 107 PERCENT OF AVERAGE PRECIPITATION.
January 2017 Yellowstone Mean Precip Oct-Jan WY2017 Yellowstone Mean Precip
FORECAST STREAM FLOW IN THE YELLOWSTONE BASIN RANGED FROM BELOW
TO ABOVE AVERAGE FOR THE UPCOMING SPRING AND SUMMER. STREAM
FLOW FOR THE BIGHORN RIVER AT ST. XAVIER, MONTANA IS
FORECAST TO BE ABOUT 147 PERCENT OF AVERAGE. FLOW IN THE
TONGUE BASIN IS EXPECTED TO BE 75 PERCENT OF AVERAGE. FLOWS IN THE
POWDER RIVER ARE EXPECTED TO BE ABOUT 70 PERCENT OF AVERAGE.
MONTHEND STORAGE AT BOYSEN RESERVOIR WAS 117 PERCENT OF AVERAGE.
STORED WATER IN BUFFALO BILL RESERVOIR WAS 136 PERCENT OF AVERAGE.
MONTHEND STORAGE WAS 105 PERCENT OF AVERAGE AT BIGHORN RESERVOIR.
Yellowstone February 1, 2017 Spring and Summer Streamflow Forecasts
Platte Basin
THE HIGH ELEVATION SNOW PACK IN THE UPPER NORTH PLATTE BASIN WAS
129 PERCENT OF AVERAGE ON FEBRUARY 1. THE SNOW PACK IN THE NORTH
PLATTE BASIN BELOW SEMINOE RESERVOIR WAS 109 PERCENT OF AVERAGE.
THE SNOW PACK IN THE SOUTH PLATTE BASIN WAS 134 PERCENT OF AVERAGE.
PRECIPITATION DURING JANUARY IN THE UPPER NORTH PLATTE
BASIN WAS 217 PERCENT OF AVERAGE. IN THE LOWER NORTH PLATTE BASIN
PRECIPITATION WAS 188 PERCENT OF AVERAGE. THE NORTH PLATTE PLAINS
BELOW GUERNSY RESERVOIR HAD 212 PERCENT. THE SOUTH PLATTE MOUNTAINS
HAD 176 PERCENT WHEREAS THE PLAINS HAD 181 PERCENT OF AVERAGE
JANUARY PRECIPITATION.
January 2017 Platte Mean Precip Oct-Jan WY2017 Platte Mean Precip
STREAM FLOW IN THE PLATTE BASIN IS FORECAST TO BE NEAR
AVERAGE DURING THE UPCOMING SPRING AND SUMMER. RUNOFF FOR
STREAMS ABOVE SEMINOE RESERVOIR ARE EXPECTED TO BE ABOUT
135 PERCENT OF AVERAGE. STREAMS IN THE SOUTH PLATTE BASIN
ABOVE SOUTH PLATTE, COLORADO CAN EXPECT 75 PERCENT OF AVERAGE
FLOW. FOR THE REMAINDER OF THE SOUTH PLATTE BASIN FLOWS ARE
EXPECTED NEAR 78 PERCENT OF AVERAGE.
STORED WATER IN THE SOUTH PLATTE BASIN WAS 104 PERCENT OF AVERAGE
ON FEBRUARY 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
