NWS Missouri River Basin/Pleasant Hill, MO

Missouri Basin River Forecast Center
Water Supply Statement
Issued in cooperation with the Natural
Resources Conservation Service
Issued:  October 15, 2015

UPPER MISSOURI BASIN

SEPTEMBER PRECIPITATION WAS ABOVE AVERAGE ACROSS THE UPPER MISSOURI
BASIN.  BASIN PRECIPITATION SUMMARIES FOR THE MISSOURI BASIN INCLUDE:
MILK ST. MARY, 103 PERCENT; MILK CANADA, 153 PERCENT; LOWER MILK, 91
PERCENT; ABOVE TOSTON, 161 PERCENT; TOSTON TO FT. PECK, 100 PERCENT.

OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA:  LIMA RESERVOIR
HAD 54 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 58 PERCENT OF
AVERAGE WATER, GIBSON RESERVOIR HAD 23 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 130 PERCENT OF AVERAGE STORED WATER.
THE  MAJOR  HYDROELECTRIC  RESERVOIRS  IN  MONTANA (CANYON  FERRY AND
FORT PECK) HAD MONTHEND STORAGE IN THE ABOVE AVERAGE RANGE; 92 AND
112 PERCENT OF AVERAGE WATER, RESPECTIVELY.

YELLOWSTONE BASIN

PRECIPITATION DURING THE MONTH OF SEPTEMBER WAS ABOUT 28 PERCENT OF
AVERAGE IN THE WIND RIVER BASIN ABOVE BOYSEN RESERVOIR, 72 PERCENT
OF AVERAGE IN THE UPPER YELLOWSTONE BASIN, 21 PERCENT OF AVERAGE
IN THE BIGHORN BASIN, AND 27 PERCENT OF AVERAGE IN THE LITTLE
BIGHORN BASINS-UPPER TONGUE BASINS, 35 PERCENT OF AVERAGE IN THE
POWDER RIVER BASIN, AND 51 PERCENT OF AVERAGE IN THE LOWER
YELLOWSTONE BASIN.

MONTHEND STORAGE WAS 102 PERCENT OF AVERAGE AT BIGHORN RESERVOIR ON
THE WYOMING/MONTANA BORDER.  

PLATTE BASIN

PRECIPITATION DURING SEPTEMBER IN THE PLATTE BASIN WAS BELOW
AVERAGE. SEPTEMBER PRECIPITATION IN THE NORTH PLATTE BASIN
ABOVE SEMINOE RESERVOIR WAS 78 PERCENT OF AVERAGE. IN THE
NORTH PLATTE BASIN BETWEEN SEMINOE RESERVOIR AND GUERNSY
RESERVOIR PRECIPITATION WAS 35 PERCENT OF AVERAGE. THE NORTH
PLATTE BASIN BELOW GUERNSY RESERVOIR HAD 31 PERCENT OF AVERAGE
PRECIPITATION. THE HIGH ELEVATIONS OF THE SOUTH PLATTE BASIN HAD
32 PERCENT OF AVERAGE SEPTEMBER PRECIPITATION WHEREAS THE PLAINS
HAD 21 PERCENT OF AVERAGE PRECIPITATION.

STORED WATER IN THE SOUTH PLATTE BASIN STORED WATER WAS 114 PERCENT
OF AVERAGE.
 

PRECIPITATION MAPS

September 2015	WY 2015
September 2015 Precipitation Percent of 1981-2010 Average	WY2015 Precipitation as Percent of 1981-2010 Average
September 2015 Basin Mean Precipitation	WY2015 Basin Mean Precipitation
September 2015 MBRFC Basin Mean Precipitation	WY2015 MBRFC Basin Mean Precipitation