Missouri Basin River Forecast Center
Water Supply Statement
Issued in cooperation with the Natural
Resources Conservation Service
Issued:  August 14, 2012


UPPER MISSOURI BASIN

 

JULY PRECIPITATION WAS BELOW AVERAGE ACROSS THE UPPER MISSOURI
BASIN. BASIN PRECIPITATION SUMMARIES FOR THE MISSOURI BASIN INCLUDE:
MILK ST. MARY, 66 PERCENT; MILK CANADA, 77 PERCENT; LOWER MILK, 59
PERCENT; ABOVE TOSTON, 90 PERCENT; TOSTON TO FT. PECK, 60 PERCENT.

OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA: LIMA RESERVOIR
HAD 131 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 98 PERCENT OF
AVERAGE WATER, GIBSON RESERVOIR HAD 106 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 95 PERCENT OF AVERAGE STORED WATER.
THE MAJOR HYDROELECTRIC RESERVOIRS IN MONTANA (CANYON FERRY AND
FORT PECK) HAD MONTHEND STORAGE IN THE ABOVE AVERAGE RANGE; 102 AND
107 PERCENT OF AVERAGE WATER, RESPECTIVELY.


 

YELLOWSTONE BASIN



PRECIPITATION DURING THE MONTH OF JULY WAS ABOUT 37 PERCENT OF
AVERAGE IN THE WIND RIVER BASIN ABOVE BOYSEN RESERVOIR, 58 PERCENT
OF AVERAGE IN THE UPPER YELLOWSTONE BASIN, 43 PERCENT OF AVERAGE
IN THE BIGHORN BASIN, AND 67 PERCENT OF AVERAGE IN THE LITTLE
BIGHORN BASINS-UPPER TONGUE BASINS, 85 PERCENT OF AVERAGE IN THE
POWDER RIVER BASIN, AND 76 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 JULY IN THE PLATTE BASIN RANGED FROM ABOVE TO BELOW
AVERAGE. JULY PRECIPITATION IN THE NORTH PLATTE BASIN
ABOVE SEMINOE RESERVOIR WAS 131 PERCENT OF AVERAGE. IN THE
NORTH PLATTE BASIN BETWEEN SEMINOE RESERVOIR AND GUERNSY
RESERVOIR PRECIPITATION WAS 70 PERCENT OF AVERAGE. THE NORTH
PLATTE BASIN BELOW GUERNSY RESERVOIR HAD 68 PERCENT OF AVERAGE
PRECIPITATION. THE HIGH ELEVATIONS OF THE SOUTH PLATTE BASIN HAD
177 PERCENT OF AVERAGE JULY PRECIPITATION WHEREAS THE PLAINS
HAD 99 PERCENT OF AVERAGE PRECIPITATION.

STORED WATER IN THE SOUTH PLATTE BASIN STORED WATER WAS 76 PERCENT OF AVERAGE.






 

 

          Precipitation Maps

 

 
          July 2012                       Oct-July WY 2012

                          

July 2012 Precipitation Percent of 1971-2000 Average                  Oct-Jul  WY2012 Precipitation as Percent of 1971-2000 Average

 


July 2012 Basin Mean Precipitation                                             Oct-Jul WY2012 Basin Mean Precipitation

                               

July 2012 MBRFC Basin Mean Precipitation                               Oct-Jul WY2012 MBRFC Basin Mean Precipitation

 

 

 

 

 

 


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