Upper Missouri Basin
THE HIGH ELEVATION SNOW PACK IN THE UPPER MISSOURI BASIN AS OF
JUNE 1 WAS BELOW AVERAGE. THE SNOW PACK ABOVE TOSTON,
MONTANA WAS 84 PERCENT OF AVERAGE. THE SNOW PACK BETWEEN TOSTON
AND FORT PECK, MONTANA WAS 79 PERCENT. THE SNOW PACK IN THE
ST MARY AND MILK RIVER BASINS WAS 94 PERCENT.
MAY PRECIPITATION ACROSS THE UPPER MISSOURI BASIN WAS
ABOVE AVERAGE. BASIN PRECIPITATION SUMMARIES FOR THE MISSOURI
BASIN INCLUDE: MILK ST. MARY, 143 PERCENT; MILK CANADA, 146 PERCENT;
LOWER MILK, 163 PERCENT; ABOVE TOSTON, 99 PERCENT; TOSTON TO
FT. PECK, 128 PERCENT.
May 2016 Upper Missouri Mean Precip Oct-May WY2016 Upper Missouri Mean Precip
STREAM FLOW IN THE UPPER MISSOURI BASIN IS FORECAST TO BE
NEAR AVERAGE DURING THE UPCOMING SPRING AND SUMMER. THE ST.
MARY RIVER IS FORECAST TO HAVE 83 PERCENT OF AVERAGE MAY-SEPTEMBER
FLOWS. RUNOFF IS EXPECTED TO RANGE AROUND 74 PERCENT OF AVERAGE
FOR THE MISSOURI BASIN ABOVE FORT PECK, MONTANA.
Upper Missouri June 1, 2016 Spring and Summer Streamflow Forecasts
OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA: LIMA RESERVOIR
HAD 128 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 88 PERCENT OF
AVERAGE WATER, GIBSON RESERVOIR HAD 110 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 132 PERCENT OF AVERAGE STORED WATER.
THE MAJOR HYDROELECTRIC RESERVOIRS IN MONTANA (CANYON FERRY AND
FORT PECK) HAD MONTHEND STORAGE IN THE AVERAGE TO BELOW AVERAGE
RANGE; 109 AND 115 PERCENT OF AVERAGE WATER, RESPECTIVELY.
Yellowstone Basin
THE HIGH ELEVATION SNOW PACK IN THE YELLOWSTONE BASIN WAS NEAR AVERAGE
ON JUNE 1. THE SNOW PACK IN THE UPPER YELLOWSTONE BASIN WAS
60 PERCENT OF AVERAGE. THE SNOW PACKS IN THE WIND, BIGHORN, AND
SHOSHONE BASINS WERE 131, 70, AND 73 PERCENT OF AVERAGE,
RESPECTIVELY. THE SNOW PACKS IN THE TONGUE AND POWDER BASINS WERE
69 AND 135 PERCENT OF AVERAGE, RESPECTIVELY.
PRECIPITATION DURING MAY WAS NEAR TO ABOVE AVERAGE. THE UPPER
YELLOWSTONE RIVER BASIN RECEIVED 91 PERCENT OF AVERAGE PRECIPITATION
WHILE THE LOWER YELLOWSTONE BASIN REPORTED 112 PERCENT OF AVERAGE.
THE BIGHORN BASIN RECEIVED 93 PERCENT OF AVERAGE PRECIPITATION
WHILE THE WIND RIVER BASIN RECEIVED 150 PERCENT OF AVERAGE.
THE LITTLE BIGHORN - UPPER TONGUE BASIN RECEIVED 84 PERCENT OF
AVERAGE AND THE POWDER RIVER HAD 66 PERCENT OF AVERAGE PRECIPITATION.
May 2016 Yellowstone Mean Precip Oct-May WY2016 Yellowstone Mean Precip
FORECAST STREAM FLOW IN THE YELLOWSTONE BASIN IS ABOVE TO BELOW
AVERAGE RANGE FOR THE UPCOMING SPRING AND SUMMER. STREAM
FLOW FOR THE WIND-BIGHORN BASIN ABOVE ST. XAVIER, MONTANA IS
FORECAST TO BE ABOUT 140 PERCENT OF AVERAGE. FLOW IN THE
TONGUE BASIN IS EXPECTED TO BE 65 PERCENT OF AVERAGE. FLOWS IN THE
POWDER RIVER ARE EXPECTED TO BE ABOUT 79 PERCENT OF AVERAGE.
MONTHEND STORAGE AT BOYSEN RESERVOIR WAS 121 PERCENT OF AVERAGE.
STORED WATER IN BUFFALO BILL RESERVOIR WAS 132 PERCENT OF AVERAGE.
MONTHEND STORAGE WAS 100 PERCENT OF AVERAGE AT BIGHORN RESERVOIR.
Yellowstone June 1, 2016 Spring and Summer Streamflow Forecasts
Platte Basin
THE HIGH ELEVATION SNOW PACK IN THE UPPER NORTH PLATTE BASIN WAS
111 PERCENT OF AVERAGE ON JUNE 1. THE SNOW PACK IN THE NORTH
PLATTE BASIN BELOW SEMINOE RESERVOIR WAS 181 PERCENT OF AVERAGE.
THE SNOW PACK IN THE SOUTH PLATTE BASIN WAS 166 PERCENT OF AVERAGE.
MAY PRECIPITATION ACROSS THE PLATTE BASIN WAS ABOVE
AVERAGE. PRECIPITATION IN THE UPPER NORTH PLATTE ABOVE SEMINOE RESERVOIR
WAS 127 PERCENT OF AVERAGE. IN THE LOWER NORTH PLATTE BETWEEN SEMINOE
RESERVOIR AND GUERNSY RESERVOIR PRECIPITATION WAS 110 PERCENT OF AVERAGE.
THE NORTH PLATTE PLAINS BELOW GUERNSY RESERVOIR HAD 105 PERCENT OF AVERAGE
PRECIPITATION. THE HIGH ELEVATIONS OF THE SOUTH PLATTE BASIN HAD 85
PERCENT OF AVERAGE PRECIPITATION WHEREAS THE PLAINS HAD 128 PERCENT OF AVERAGE
MAY PRECIPITATION.
May 2016 Platte Mean Precip Oct-May WY2016 Platte Mean Precip
STREAM FLOW IN THE PLATTE BASIN IS FORECAST TO BE ABOVE
AVERAGE DURING THE UPCOMING SPRING AND SUMMER.
RUNOFF FOR STREAMS ABOVE SEMINOE RESERVOIR IS FORECAST NEAR
128 PERCENT OF AVERAGE. STREAM FLOWS FOR THE NORTH PLATTE
BELOW SEMINOE RESERVOIR ARE FORECAST TO BE 145 PERCENT OF
AVERAGE. STREAMS IN THE SOUTH PLATTE BASIN ABOVE SOUTH PLATTE,
COLORADO CAN EXPECT 120 PERCENT OF AVERAGE FLOW. FOR THE
REMAINDER OF THE SOUTH PLATTE BASIN FLOWS ARE EXPECTED NEAR
115 PERCENT OF AVERAGE.
STORED WATER IN THE SOUTH PLATTE BASIN WAS 112 PERCENT OF AVERAGE
ON JUNE 1. STORED WATER IN THE NORTH PLATTE BASIN WAS 140
PERCENT OF AVERAGE.
North Platte Streamflow Fcst South Platte Streamflow Fcst
