Water Supply Statement for the Missouri River Basin issued for November 2017

Missouri Basin River Forecast Center
Water Supply Statement
Issued in cooperation with the Natural
Resources Conservation Service
Issued:  December 19, 2017

UPPER MISSOURI BASIN

NOVEMBER PRECIPITATION RANGED FROM BELOW TO ABOVE AVERAGE ACROSS THE 
UPPER MISSOURI BASIN.  BASIN PRECIPITATION SUMMARIES FOR THE MISSOURI 
BASIN INCLUDE: MILK ST. MARY, 141 PERCENT; MILK CANADA, 135 PERCENT; 
LOWER MILK, 71 PERCENT; ABOVE TOSTON, 156 PERCENT; TOSTON TO 
FT. PECK, 139 PERCENT.

OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA:  LIMA RESERVOIR
HAD 183 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 112 PERCENT OF
AVERAGE WATER, GIBSON RESERVOIR HAD 36 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 138 PERCENT OF AVERAGE STORED WATER.
THE  MAJOR  HYDROELECTRIC  RESERVOIRS  IN  MONTANA (CANYON  FERRY AND
FORT PECK) HAD MONTHEND STORAGE IN THE ABOVE AVERAGE RANGE; 96 AND
115 PERCENT OF AVERAGE WATER, RESPECTIVELY.

YELLOWSTONE BASIN

PRECIPITATION DURING THE MONTH OF NOVEMBER WAS ABOUT 143 PERCENT OF
AVERAGE IN THE WIND RIVER BASIN ABOVE BOYSEN RESERVOIR, 216 PERCENT
OF AVERAGE IN THE UPPER YELLOWSTONE BASIN, 153 PERCENT OF AVERAGE
IN THE BIGHORN BASIN, AND 138 PERCENT OF AVERAGE IN THE LITTLE
BIGHORN BASINS-UPPER TONGUE BASINS, 102 PERCENT OF AVERAGE IN THE
POWDER RIVER BASIN, AND 116 PERCENT OF AVERAGE IN THE LOWER
YELLOWSTONE BASIN.

MONTHEND STORAGE WAS 105 PERCENT OF AVERAGE AT BIGHORN RESERVOIR ON
THE WYOMING/MONTANA BORDER.
 

PLATTE BASIN

PRECIPITATION DURING NOVEMBER IN THE PLATTE BASIN WAS BELOW
AVERAGE. NOVEMBER PRECIPITATION IN THE NORTH PLATTE BASIN
ABOVE SEMINOE RESERVOIR WAS 95 PERCENT OF AVERAGE. IN THE
NORTH PLATTE BASIN BETWEEN SEMINOE RESERVOIR AND GUERNSY
RESERVOIR PRECIPITATION WAS 73 PERCENT OF AVERAGE. THE NORTH
PLATTE BASIN BELOW GUERNSY RESERVOIR HAD 84 PERCENT OF AVERAGE
PRECIPITATION. THE HIGH ELEVATIONS OF THE SOUTH PLATTE BASIN HAD
65 PERCENT OF AVERAGE NOVEMBER PRECIPITATION WHEREAS THE PLAINS
HAD 46 PERCENT OF AVERAGE PRECIPITATION.

STORED WATER IN THE SOUTH PLATTE BASIN STORED WATER WAS 118 PERCENT
OF AVERAGE.

PRECIPITATION MAPS

November 2017	WY 2018
November 2017 Precipitation Percent of 1981-2010 Average	WY2018 Precipitation as Percent of 1981-2010 Average
November 2017 Basin Mean Precipitation	WY2018 Basin Mean Precipitation
November 2017 MBRFC Basin Mean Precipitation	WY2018 MBRFC Basin Mean Precipitation