Water Supply Conditions in the Missouri River Basin for September 2014

Missouri Basin River Forecast Center
Water Supply Statement
Issued in cooperation with the Natural
Resources Conservation Service
Issued:  October 14, 2014

UPPER MISSOURI BASIN

SEPTEMBER PRECIPITATION WAS NEAR AVERAGE ACROSS THE UPPER MISSOURI
BASIN.  BASIN PRECIPITATION SUMMARIES FOR THE MISSOURI BASIN INCLUDE:
MILK ST. MARY, 79 PERCENT; MILK CANADA, 102 PERCENT; LOWER MILK, 95
PERCENT; ABOVE TOSTON, 130 PERCENT; TOSTON TO FT. PECK, 90 PERCENT.

OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA:  LIMA RESERVOIR
HAD 87 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 63 PERCENT OF
AVERAGE WATER, GIBSON RESERVOIR HAD 70 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 157 PERCENT OF AVERAGE STORED WATER.
THE  MAJOR  HYDROELECTRIC  RESERVOIRS  IN  MONTANA (CANYON  FERRY AND
FORT PECK) HAD MONTHEND STORAGE IN THE ABOVE AVERAGE RANGE; 105 AND
108 PERCENT OF AVERAGE WATER, RESPECTIVELY.

YELLOWSTONE BASIN

PRECIPITATION DURING THE MONTH OF SEPTEMBER WAS ABOUT 114 PERCENT OF
AVERAGE IN THE WIND RIVER BASIN ABOVE BOYSEN RESERVOIR, 131 PERCENT
OF AVERAGE IN THE UPPER YELLOWSTONE BASIN, 107 PERCENT OF AVERAGE
IN THE BIGHORN BASIN, AND 108 PERCENT OF AVERAGE IN THE LITTLE
BIGHORN BASINS-UPPER TONGUE BASINS, 90 PERCENT OF AVERAGE IN THE
POWDER RIVER BASIN, AND 59 PERCENT OF AVERAGE IN THE LOWER
YELLOWSTONE BASIN.

MONTHEND STORAGE WAS 107 PERCENT OF AVERAGE AT BIGHORN RESERVOIR ON
THE WYOMING/MONTANA BORDER.  

PLATTE BASIN

PRECIPITATION DURING SEPTEMBER IN THE PLATTE BASIN WAS ABOVE
AVERAGE. PRECIPITATION IN THE NORTH PLATTE BASIN
ABOVE SEMINOE RESERVOIR WAS 140 PERCENT OF AVERAGE. IN THE
NORTH PLATTE BASIN BETWEEN SEMINOE RESERVOIR AND GUERNSY
RESERVOIR PRECIPITATION WAS 127 PERCENT OF AVERAGE. THE NORTH
PLATTE BASIN BELOW GUERNSY RESERVOIR HAD 189 PERCENT OF AVERAGE
PRECIPITATION. THE HIGH ELEVATIONS OF THE SOUTH PLATTE BASIN HAD
158 PERCENT OF AVERAGE SEPTEMBER PRECIPITATION WHEREAS THE PLAINS
HAD 168 PERCENT OF AVERAGE PRECIPITATION.

STORED WATER IN THE SOUTH PLATTE BASIN STORED WATER WAS 139 PERCENT
OF AVERAGE. 

PRECIPITATION MAPS

September 2014	WY 2014
September 2014 Precipitation Percent of 1981-2010 Average	WY2014 Precipitation as Percent of 1981-2010 Average
September 2014 Basin Mean Precipitation	WY2014 Basin Mean Precipitation
September 2014 MBRFC Basin Mean Precipitation	WY2014 MBRFC Basin Mean Precipitation